2. Fig shown below shows a PCM wave in which the amplitude levels of +1 volt and -1volts are used to represent binary symbols 1 and 0 respectively. The code word usedconsists of three bits. Find the sampled version of an analog signal from which thisPCM wave is derived before and after the smoothing LPF.+10-10 0 10 10TཁྱTb..........t

Step 1: Decode the PCM WaveThe PCM waveform provided represents a digital sequence where each sample…

Answered: 2. Fig shown below shows a PCM wave in…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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5. A signal is expected to have a frequency of fm 1000 Hz. (a) (b) (c) signal? What minimum sampling frequency is required in order to accurately measure this What frequencies would be experimentally observed if the signal were sampled at 1500 Hz? Show the folding diagram and label it up to 4500 Hz. At what frequency would the signal, fm 1000 Hz, be observed as if sampling at 1500 Hz? Also list and show on the folding diagram, the lowest four frequencies that would be aliased and also observed at the same alias frequency as the expected signal.
What will be the output SNR for a PCM system with 16 levels in the quantizer. Assume full scale sinusoidal signal amplitude is presented.
This question from Digital Communication 1 Course.
4. Signal conditioning element basically takes the output of the sensing element and converts it into a form more suitable for further processing, usually in the form of a DC voltage, DC current or variable frequency AC voltage. The output of the sensing element is usually too small to operate an indicator or a recorder. Therefore, it is suitably processed and modified in the signal conditioning element so as to obtain the output in the desired form that is amplify the signal and filtering the unwanted signal. i. Describe the aliasing phenomenon. ii. Suggest a solution to minimize the effect of aliasing.
(Aliasing) An analog-to-digital converter samples a 20 Hz voltage signal at 100 samples/s. a. What is the frequency of the sampled signal? Is it aliased? b. Now suppose a second, 60 Hz signal, caused by line noise, is added to the original signal. To what frequency is this this line noise aliased? c. If the sampling rate is lowered to 50 samples/s, what frequencies are now present in the sampled signal? Power Supply -width
Just need 1d and 1e answered.
Choose the correct answer: 1. In AM, the over modulation scenario occurs when the amplitude of the modulating signal is the amplitude of the carrier signal. (equal to, less than, greater than, not related). 2. The noise signal can be studied in time and frequency domains). (only time domain, only frequency domain, both 3. The diode in the envelope detector circuit is wave rectifier). (clipper, clamper, half wave rectifier, full the output SNR. (half, equal to, twice, not related). 4. In DSB-SC, the input SNR is 5. In cascaded systems, the total transfer function is the functions. (sum, subtraction, multiplication, division). of individual systems' transfer
| 2-Consider the following analog waveform.This waveform is to be sampled at a 1-kHz rate and quantized with a 3-bit quantizer (input voltage range is -1.0 to +1.0 V). (a) ) What is the resolution of this quantizer? (b) p) On the graph, circle the sample points on the analog waveform below. Note that the time axis is in msec. (c)() On the graph, indicate the quantization intervals and corresponding digital words. (d) ) On the graph, indicate the digital word assigned to each sample point. (e)() When a receiver receives the transmitted bits, D/A is used to recover the analog signal, but the recovered signal is not the same as the original analog signal. What is the term to describe this difference and what can be done to minimize this difference? 075 0.5- 025 025 0.5 075 10 time (msec) W oprajjdwe
Multiple-choice questions: 1. When BJTs are used in digital circuits they usually operate in the: a. active region b. breakdown region c. saturation and cutoff regions d. linear region 2. Often a common-collector will be the last stage before the load; the main function(s) of this stage is to: a. provide voltage gain b. provide phase inversion (Inverting) c. provide a high-frequency path to improve the frequency response d. buffer the voltage amplifiers from the low-resistance load and provide impedance matching for maximum power transfer 3. A decrease in base current of a C.E. amplifier causes the voltage measured between the emitter and the collector to increase. a. True b. False
VcC R2 RC- RI RL R1 RE VEE Assume: B=100, VA=150, Vcc=12V, VɛE=GND, R=2K, R1=160K, R2=300K, Rɛ=3K, Rc=2.2K, and R1=100K. A.)For the circuit draw the AC equivalent circuit (including the small signal model for the transistor). Then compute r„, ľo, and gm. Then compute Av (the gain for the entire circuit), and Rin (for the whole circuit). B.)Convert the circuit to a common-collector circuit. Draw the new circuit (assume the same values for the input and load resistances). Then compute the terminal voltage gain, and Rin (for the whole circuit), re-computing any parameters that you need to solve.
Determine the power saving in percent when the carrier is suppressed in an AM signal modulated to 80%
1

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