Pulse amplitude modulation Block Diagram

Pulse Amplitude Modulation (PAM) : Working, Types & Its

  1. The generation of PAM can be done based on the following block diagram of pulse amplitude modulation. The basic type of pulse modulation is known as PAM or Pulse amplitude modulation, where the signal can be sampled at regular intervals & every sample can be made relative to the modulating signal's amplitude on the sampling moment
  2. Pulse Amplitude Modulation (PAM) Definition: A modulation technique in which the amplitude of the pulsed carrier signal is changed according to the amplitude of the message signal is known as Pulse Amplitude Modulation (PAM). Simply put, the transmission of data takes place by the variation of the amplitude of pulse according to the modulating.
  3. ed level. A block diagram showing the basic classification of modulation techniques is given below
  4. The Pulse Width Modulation (PWM) varies the width of individual pulses according to the amplitude of the modulating signal. The Pulse Position Modulation (PPM) varies the position of individual pulses from their mean position according to the amplitude of the modulating signal. The PWM is a kind of modulation technique indented for power efficiency, but the power required to transmit individual pulses varies significantly

What is Pulse Amplitude Modulation (PAM)? Definition

  1. Pulse Amplitude Modulation Objective 1. To investigate the process of sampling and the implications of its different In the basic block diagram of Fig.6 the received PAM pulses are used to regenerate the sampling pulse train at the receiver to be used then along with th
  2. Baseband Pulse Amplitude Modulation (PAM) Contents Slide 1 Pulse Amplitude Modulation (PAM) Slide 2 Block Diagram of PAM System Slide 3 PAM Block Diagram Description Slide 4 Block Diagram Description (cont. 1) Slide 5 Block Diagram Description (cont. 2) Slide 6 Block Diagram Description (cont. 3) Slide 7 Intersymbol Interference (ISI) Slide 8 Eye Diagrams
  3. Fig. 1: Block Diagram Of Pulse Amplitude Modulation (PAM) { 1) Variable frequency sine wave generator. A sine wave generator circuit is used in this project which is based on the Wien Bridge Oscillator (WBO) circuit. The Wien Bridge oscillator circuit can produce distortion less sinusoidal sweep at its output
  4. PWM Demodulator Block Diagram (Fig : 1) PWM coding can be done using 741 op amp that we discussed before. Here the modulated (PWM) wave is applied to the decoder system for getting the message signal

Amplitude Modulation Block Diagram. Here the modulating signals might be an audio or video signal. These are also called as baseband signals as these are modulated with the carrier signals. Carriers are extremely high-frequency radio signals, In general, carrier signals are received from the RF oscillators. These two signals are combined in a modulator Block Diagram of Pulse Code Modulation Here is a block diagram of the steps which are included in PCM. In sampling, we are using a PAM sampler that is Pulse Amplitude Modulation Sampler which converts continuous amplitude signal into Discrete-time- continuous signal (PAM pulses)

Pulse Modulation - Definition, Types, Block Diagrams

Block Diagram of Pulse Amplitude Modulation (PAM

Circuit Design: Pulse Amplitude Demodulatio

Part I: Binary PAM Modulator Using blocks from the SIMULINK Block Library, the Signal Processing Blockset, and the Communications Blockset, design a modulator (below) for the system model above. Use the modulator to send the sequence 1 -1 -1 1. The modulator is composed of three blocks. The first block can be found a - LAB Manual Pulse Amplitude Modulation Experiment 5 Experiment 2 Delta Modulation Block Diagram The transmitter consists of a hard limiter (comparator), whose output is high or low depending on the difference between the input signal and its approximation. See figure 4. The output of the limiter is multiplied with the sampling clock

amplitude level . 2. The amplitude level modulates the output of the transmitting filter, the output of the modulator is the transmitted signal. Thus, we can describe the modulator as a model with a pre-code which performs the task 1 and a pulse shape filter or the transmitting filter which performs the task 2. {}0, 1 binary sequence a n ∈. For pulse-amplitude modulated (PAM) signals, the demodulation is done using a holding circuit. Figure 3.26(b) shows the block diagram of a PAM demodulator. DIAGRAM FIGURE 3.26 (b) A block diagram of PAM demodulator In this method, the received PAM signal is allowed to pass through a holding circuit and a low pass filter (LPF) as shown in above. To study and perform Pulse Amplitude Modulation and Demodulation. 4. To study and perform Pulse Width Modulation and Demodulation. CIRCUIT DIAGRAM: Fig.1: FM Modulator PROCEDURE: 1. (given in AF oscillator block) with the DC marked socket..

8.2.1 Pulse Amplitude Modulation. A PAM system can be visualized as a switch that closes every T s seconds for Δ seconds, and remains open otherwise. The PAM signal is thus the multiplication of the continuous-time signal x ( t) by a periodic signal p ( t) consisting of pulses of width Δ, amplitude 1 / Δ and period T s Pulse Amplitude Modulation & Demodulation 7 Pulse Width Modulation & Demodulation 8 Pulse Position Modulation & Demodulation 9 PCM Generation and Detection 10 Delta Modulation 11 BLOCK DIAGRAM: AM MODULATOR . AM DEMODULATOR THEORY : Amplitude modulation (AM) is defined as a process in which the amplitude of the carrier wave.


In this post we will discuss Pulse Amplitude Modulation (PAM). Pulse Amplitude Modulation is a pulse modulation technique. Other techniques of analog pulse modulation are- Pulse Width Modulation and Pulse Position Modulation ().But before discussing pulse amplitude modulation, it is important to know, what is pulse modulation and how it is different from continuous wave modulation Fig1. Simple Block Diagram of PAM Unlike the Amplitude modulation that varies the amplitude of the carrier signal in both the half cycles, the PAM modulation varies the amplitude of all the pulses.

Today communication is the heart of the technology.Communication is achieved over a transmitter and a receiver through signals. These signals carry the information through modulation. Pulse Amplitude Modulation is one of the kinds of modulation techniques used in signal transmission. Pulse amplitude modulation is the simplest form of modulation Pulse Amplitude Modulation (PAM) is an analog modulating scheme in which the amplitude of the pulse carrier varies proportional to the instantaneous amplitude of the message signal. The pulse amplitude modulated signal, will follow the amplitude of the original signal, as the signal traces out the path of the whole wave 1.1Designing and Simulating an 4-PAM Modulator The PAM modulator can be divided into five main stages: a) bit stream source, b) mapping, c) upsampling or impulse modulation, d) pulse shaping and e) modulation. You will design and test these stages using Simulink, and will put them together to create a 4-PAM modulator Different modulation techniques are explained with the help of the following block diagram: If the amplitude of a pulse or duration of a pulse is varied according to the instantaneous values of the baseband modulating signal, then such a technique is called as Pulse Amplitude Modulation (PAM)

Pulse Width Demodulation theory with Block diagram and

Pulse Amplitude Modulation (PAM) is a type of pulse modulation in which the signal is sampled at regular intervals, with each sample proportional to the amplitude of the signal at the time of sampling. Contents show How to generate PAM Advantages of Pulse Amplitude Modulation Disadvantages of Pulse Amplitude Modulation There are two types of Pulse <a title=Pulse Amplitude Modulation (PAM. EECS 700: M-ary Pulse Amplitude Modulation (MPAM) The goal of this exercise is to correctly demodulate the noisy received signal in Rx8PAM.mat . The major new step in this exercise is the need for proper DECISION logic (not just a simple SIGN operation). The transmitted data points are taken from the signal space constellation below Sep 27, 2018 - The Pulse Position Modulation (PPM) is a modulation technique designed to achieve the goals like simple transmitter and receiver circuitry, noise performance, constant bandwidth and the power efficiency and constant transmitter power. In Pulse Position Modulation the amplitude of the pulse is kept constant as in the case of the FM and PWM to avoid noise interference In pulse amplitude modulation (PAM), the information, signal is sampled at the sampling rate and the carrier pulse In pulse is discretely amplitude - modulated at the sampling frequency. For faithful transmission, the signal should It-119 The information is transferred to e sampled sufficiently. the pulse at the sampling frequency A pulse amplitude modulation, frequency modulation telemetric data transmission system comprising: FIG. 3 illustrates in partially circuit schematic and partially block diagram of the channel commutator, premodulation filter and mixing amplifier more broadly shown in block in FIG. 1


Amplitude Modulation - Types, Derivatives, Block Diagram

both the phase and amplitude axes. Since (in QAM technologies) 2. N. QAM offers increased Nth frequency usage efficiency compared to the normal OOK (On Off Keying), it is the focus of active R&D as a prospective technology for configuring future large-capacity core networks. Fig.2 shows a typical digital coherent block diagram Pulse-amplitude modulation, acronym PAM, is a form of signal modulation where the message information is encoded in the amplitude of a series of signal pulses. It is an analog pulse modulation scheme in which the amplitude of train of carrier pulse are varied according to the sample value of the message signal. Example: A two-bit modulator will. Pulse Amplitude Modulation: LabVIEW Implementation Programming: The following steps describe how to build a VI which implements Pulse Amplitude Modulation. Download PAM-ModulationTemplate.vi from the course website. Inspect the front panel and block diagram that has already been created for you. When this VI i

Fig.1 Block diagram of Delta modulation transmitter. Sample and hold circuit will sample the analog input signal into Pulse amplitude modulated (PAM) signal. The generated PAM signal is given as one of the input to the comparator and the other input is a signal from DAC output BLOCK DIAGRAM OF PAM: WAVEFORM: PULSE POSITION MODULATION: Pulse-position modulation (PPM) is a form of signal modulation, sometimes known as pulse phase modulation is used for digital signal transition in which M message bits are encoded by transmitting a single pulse in one of possible time-shifts Pulse Position Modulation (PPM) is an analog modulation scheme in which, the amplitude and the width of the pulses are kept constant, while the position of each pulse, with reference to the position of a reference pulse varies according to the instantaneous sampled value of the message signal Modulation and Demodulation Chapter 9. oscillator 90. o. I . baseband Q baseband QPSK Modulated Output. Σ. f. c. cos. w. c. t −sin. w. c. t Rtcos( ) wq. c + Figure 9.2. Block diagram of QPSK modulator. to the carrier frequency, the modulated signal is given simply as. x(t) ˜ = I(t) + jQ(t) (9.2.2) Simulation of this idealized signal.

this is a ppt for pulse modulation for final year EJ diplom View MATLAB Command. Generate random data symbols and apply pulse amplitude modulation. Set the modulation order. M = 8; Generate random integers and apply PAM modulation having an initial phase of /4. data = randi ( [0 M-1],100,1); modData = pammod (data,M,pi/4); Display the PAM constellation diagram

Pulse Code Modulation and Demodulation : Block Diagram

  1. The Fig1 illustrates the block diagram of Delta modulation transmitter. Fig1. Delta modulation transmitter. Sample and hold circuit will sample the analog input signal into Pulse amplitude modulated (PAM) signal. The generated PAM signal is given as one of the input to the comparator and the other input is a signal from DAC output
  2. In this post, we will discuss the Quadrature Amplitude Modulation (QAM). Here we will see, the basic concept of quadrature amplitude modulation and why it is known as quadrature amplitude modulation. The block diagram of QAM transmitter and receiver also has been explained here. Watch the Complete Video Here
  3. File Pwm Using 555 Timer Circuit Diagram Webp Wikimedia ~15 kv, the flat top pulse amplitude made up about 2 kv, the pulse delay ∆t = 0.3 µs, the fall time was 0.5 µs. at a beam current of 23 a, the flat top pulse amplitude was ~13 kv (fig. 3b, curve 2). it is seen from the figure that the overshoot amplitude and the amplitude of the main part of the pulse at the beam

being determined according as to whether the input message sample amplitude has increased or decreased relative to the previous sample. It is an example of differential pulse code modulation (DPCM). block diagram The operation of a delta modulator is to periodically sample the input message, t This block diagram shows a modulator with two inputs i.e. modulating signal and carrier signal. And at the output, we get the modulated signal. Pulse Amplitude modulation (PAM) Pulse width modulation (PWM) Pulse code modulation (PCM) In this article, we will cover Analog modulation and its types Bandpass Modulation Schemes One dimensional waveforms Amplitude Shift Keying (ASK)‏ M-ary Pulse Amplitude Modulation (M-PAM)‏ Two dimensional waveforms M-ary Phase Shift Keying (M-PSK)‏ M-ary Quadrature Amplitude Modulation (M-QAM)‏ Multidimensional waveforms M-ary Frequency Shift Keying (M-FSK) One dimensional modulation, demodulation. PPM (Pulse Position Modulation): Pulse Position Modulation (PPM) is a modulation technique in which, the width and the amplitude of the pulses are kept constant, while the position of each pulse, with reference to the position of a relating pulse, varies according to the instantaneous sampled value of the message wave Amplitude Modulation (18) Angle Modulation (3) Basic Electrical Engineering (1) Basic electronics Solved problems (8) Big Data (2) Blogging (1) Boolean Logic (2) Capacitors (2) Career Advice (4) Combinational Circuit (7) Communication (65) Computer Networking (73) Conversion Rate Optimization (2) Converters (1) CRO (5) DC-DC Converters (2) Diac (1

Pulse Amplitude Modulation (MATLAB + Simulink): - WoInTe

In this article, you will find the Study Notes on Types of Modulation and Demodulation which will cover the topics such as Introduction to communication systems, Amplitude and Demodulation, Classification of AM, Angle modulation and Demodulation, Generation of FM and Pulse Modulation. 1. Introduction to Communication Systems. Communication is a process by which information is exchanged between. The function A(t) is a variation of the amplitude in the function of time t - ie an amplitude modulation. In the simplest case, the transmitter is for a short time switched on (for the time τ) and remains in the rest of the time in the off position. A(t) is then in the transmission case = 1, otherwise = 0. The function of time is then determined by the pulse repetition frequency and the. PCM modulation is commonly used in audio and telephone transmission. The main advantage is the PCM modulation only needs 8 kHz sampling frequency to maintain the original quality of audio. Figure 1.1is the block diagram of PCM modulation. First of all low pass filteris the, which is used to remove the noise in the audio signal Quadrature amplitude modulation concept What is QAM, quadrature amplitude modulation. Quadrature Amplitude Modulation, QAM is a signal in which two carriers shifted in phase by 90 degrees (i.e. sine and cosine) are modulated and combined. As a result of their 90° phase difference they are in quadrature and this gives rise to the name

The modulator modulates the pseudo-random bit sequence (which is a random bit stream with combination of 1s and 0s) to the pulse amplitude (four different levels around 0.001a.u., 0.000824a.u., 0.00065a.u. and 0.00049a.u The also di erent, and novel algorithms have to be block diagram of the AM±FM modulation anal- devised to e ciently capture the patterns in the ysis±synthesis system is shown in Fig. 3. amplitude envelope and instantaneous frequency Both the AM±FM vocoder and the parallel signals of the AM±FM vocoder

What is Pulse Code Modulation (PCM)? Definition, Block

PULSE CODE MODULATION-Definition, Block Diagram - GeeksGo

Chapter 7: Pulse Modulation Basic concepts Modulation: a process by which a property of a parameter of a signal is varied in proportional to a second (given) signal . We use modulation technique to alter signals in time and frequency to accomplish desired objectives. Analog or continuous-wave (CW) modulation: is use Pulse compression is a method for improving the range resolution of pulse radar . This method is also known as intra-pulse modulation ( modulation on pulse, MOP ) because the transmitted pulse got a time-dependent modulation internally. In publications the inaccurate term Chirp-Radar is often taken (which only describes a part of the possible. allowed to occupy. Modulation is necessary in all of the above scenarios. 14.2 ANALOG MODULATION In analog modulation, the characteristics of the modulated sinusoid (such as amplitude, frequency or phase) can take a continuum of values depending on the source of the information. The two common forms of analog modulation are amplitude modulation

Multiple-level phase amplitude (M-PAM) clock and data recovery circuitry uses information from multiple phase detectors to generate one or more data sampling clocks that are optimized for each of the data slicers. One possible 4-PAM implementation includes 3 data slicers, 3 edge slicers, 3 phase detectors, and a single VCO. The phase detector outputs are combined (e.g., via weighted voting. The block diagram of synchronous demodulator is as shown In order for the low-pass to detect the information envelope, the frequency of the carrier must be as high as possible. However, as you can imagine the noise from the nature (i.e. white noise) cannot be filtered/removed perfectly in such analog transmissions (AM, or FM) amplitude modulation A = I2 +Q2 Figure 3. Error-feedback digital ΔΣ modulator Figure 4. Pulse-density modulator block diagram The pulse-density process creates a spectrum similar to amplitude-modulation. Shown in fig. 2, the output includes harmonics symmetric around the carrier that can contaminate the output spectrum. Harmonics can also b Differential Pulse Code Modulation (DPCM) According to the Nyquist sampling criterion, a signal must be sampled at a sampling rate transmitter of the above system can be represented by the following block diagram. EE 370-3 (082) Ch. VI: Sampling & Pulse Code Mod. amplitude of a difference signal like d[k] or even g[k]. In fact,. Figure 2.13.4: Quadrature modulator block diagram. In PSK modulation i(t) and q(t) have the same amplitude and indicate a phase ϕ of the modulated carrier so that i(t) = cos[ϕ(t)] and q(t) = sin[ϕ(t)]. The particular example shows two possible values of Ik and Qk and this indicates QPSK modulation. the modulated signal

Pulse Amplitude Modulation (PAM) : Working, Types & Its

Pulse amplitude modulation - SlideShar

2. Pulse Amplitude Modulation (PAM): In pulse amplitude modulation, the amplitude of regular interval of periodic pulses or electromagnetic pulses is varied in proposition to the sample of modulating signal or message signal. This is an analog type of modulation Preparation - Quadrature Amplitude Modulation Name: Experiment Date: Student No.: Grade: / 10 1. Draw a block diagram for the 16- QAM transmitter, from an A/D converter to the quadra-ture amplitude modulated signal to be input to a channel. Give details on how to operate on the baseband signal prior to mixing with the carriers Chart and Diagram Slides for PowerPoint - Beautifully designed chart and diagram s for PowerPoint with visually stunning graphics and animation effects. Our new CrystalGraphics Chart and Diagram Slides for PowerPoint is a collection of over 1000 impressively designed data-driven chart and editable diagram s guaranteed to impress any audience

sequence of amplitudes obtained by mapping k -bit blocks of binary digits from the information sequence {a n} into the amplitude levels ±1,±3, . . . , ±(M − 1). • g (t) pulse shape. Example: rectangular pulse of amplitude 1 /2T and duration T seconds. • d(t) is used to frequency -modulate the carrier • v (t) the equivalent lowpass. THEORY: Pulse Code Modulation (PCM) is different from Amplitude Modulation (AM) and Frequency Modulation (FM) because those two are continuous forms of modulation. PCM is used to convert analog signals into binary form. Inthe absence of noise and distortion it is possible to completely recover a continuous analog modulated signals In analog pulse modulation, the amplitude ,width or position of the rectangular pulses is changed in accordance with the modulating signal. This will result in PAM(pulse amplitude modulation), Above figure shows the block diagram of a PCM receiver. Operation of PCM receiver Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a method of reducing the average power delivered by an electrical signal, by effectively chopping it up into discrete parts.The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods.

MATLAB Programming & Simulink Model for Pulse Amplitude

The case of scatter plot is a little different. After downsampling the matched filter output to symbol rate, the samples thus obtained are mapped back to the constellation, previously illustrated in QAM detector block diagram and now drawn in Figure below for $4$-QAM modulation Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals.It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio applications. In a PCM stream, the amplitude of the analog signal is sampled regularly at uniform intervals, and each sample is quantized to the nearest value within a range of digital steps This article discusses the technique of generating a PWM wave corresponding to a modulating sine wave.DESCRIPTION:The Pulse Width Modulation is a technique in which the ON time or OFF time of a pulse is varied according to the amplitude of the modulating signal, keeping tFig. 1: Block Diagram of Pulse Width Modulation (PWM)he (ON time + OFF.

Demodulation of PAM Signals - Electronics Pos

graphs block diagram the e 1231 is a single channel 1 3 octave active graphic equalizer designed to allow clean equalizer switch puts the input signals either in circuit or out of circuit of the equalizer the out position, fig 1 block diagram of pulse amplitude modulation pam 1 variable frequency sine 1 / 1 convolution of rectangular pulse p(t) with ideally sampled signal say y(t) as shown in diagram below: Fig 3- Flat Top Sampling As shown in Fig 3, the output obtained after sampling an analog signal is a Pulse Amplitude modulated signal. This process is known as Pulse Amplitude Modulation (PAM) Fig. 3 -Types of Pulse Width Modulation Techniques. Generation of Pulse Width Modulation (PWM) Signal. Pulse Width Modulating signal can be generated using a Comparator as shown in the figure 4 (A). Modulating signal forms one of the input to the Comparator and the other input is fed with a non-sinusoidal wave or sawtooth wave. It operates at. Another technique to encode the input is pulse width modulation, or PWM. Instead of altering the number of pulses in a given period of time, we keep the frequency constant and adjust the width of the pulses. If the input amplitude is high, the width of the corresponding pulse will be wide and if the amplitude is low, the pulse width will be narrow

So, Pulse Time Modulation are of three types i.e. Pulse Width Modulation (PWM) Pulse Position Modulation (PPM) Pulse Frequency Modulation (PFM) 1. Pulse Width Modulation (PWM) In this type of modulation, the width of the pulses is varied according to the amplitude of the input signal. Pulses have fixed starting time and fixed amplitude but. Amplitude Shift Keying A S K ASK is a type of Amplitude Modulation which represents the binary data in the form of variations in the amplitude of a signal. Any modulated signal has a high frequency carrier. The binary signal when ASK modulated, gives a zero value for Low input while it gives the carrier output for High input. The following figure represents ASK modulated waveform along with. -Armstrongs Phase modulator 5. Phase Division Modulation (PDM)-phase division demodulation 6. Frequency Modulation (FM)-generation by VCO (wideband)-demodulation by PLL-demodulation by zero crossing method 7.Pulse Amplitude Modulation(PAM)-sampling theorem / Nyquist-aliasing and -reconstruction-time division multiplexing (TDM) only 8

Explain generation and demodulation of PAM, PPM and PWM

AMPLITUDE MODULATION Amplitude modulation is defined as the process in which amplitude of the carrier wave is varied in accordance with the instantaneous values of the modulating signal. The envelope of the modulated wave has the same shape as the base band signal provided the following two requirements are satisfied- 1. The carrier frequency f Amplitude Shift Keying (ASK) is a type of digital modulation in which the amplitude of the carrier is varied with respect to the digital message. If we send one bit/symbol, we call it as Binary Amplitude Shift Keying (BASK), in which case the carrier amplitude is assumed to have 2 values (one corresponding to 1 and other corresponding to 0)

Pulse Amplitude Modulation (PAM) | ElectricalvoicePulse amplitude modulation

Pulse Amplitude Modulation Circuit Diagram - Circuit Desig

ASK - amplitude shift keying D1 - 53 time SEQUENCE 0 + 5 0 + REGENERATED DEMODULATOR OUTPUT (stage 1) (stage 2) Figure 5: the two stages of the demodulation process bandwidth estimation It is easy to estimate the bandwidth of an ASK signal. Refer to the block diagram of Figure 3. This is a DSB transmitter. It is an example of linear modulation. Pulse-density modulation. Pulse-density modulation, or PDM, is a form of modulation used to represent an analog signal with a binary signal. In a PDM signal, specific amplitude values are not encoded into codewords of pulses of different weight as they would be in pulse-code modulation (PCM); rather, the relative density of the pulses. Pulse Width Modulation (PWM) is a technique to generate low frequency output signals from high frequency pulses. Rapidly switching the output voltage of an inverter leg between the upper and lower DC rail voltages, the low frequency output can be thought of as the average of voltage over a switching period CCTV Block Diagram with Explanation. Closed Circuit Television (CCTV) is a system in which the circuit is closed and all of the elements are directly connected. We know that, in broadcast television, from the airwaves, any receiver that is correctly tuned can pick up the signal. In CCTV this is different Radio Frequency Modulation Made Easy. Modulation is a technique that changes the characteristics of the carrier frequency in accordance to the input signal [1, 2]. Figure 1.1 shows the conceptual block diagram of a modern wireless communication system. As shown in the figure, modulation is performed at the transmit side and demodulation is.

Demodulation of PWM and PPM (Block Diagram and Waveform

  1. [3 marks] (ii) Next, draw a block diagram of a pulse code modulation (PCM) Question: (b) Pulse modulation is a type of modulation in which the signal is transmitted in the form of pulses. (i) Differentiate between Pulse Width Modulation (PWM), Pulse Position Modulation (PPM), Pulse Amplitude Modulation (PAM) by sketching a waveform for each.
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What is pulse width modulation? - Quora

Block Diagram: Pulse Code Modulatio

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