please solve just d Question 4 :Design an analog pulse-width modulated (PWM) signal generator in order to drive a servo motor.a) What is the definition of modulation and what are pulse-width, pulse-position and pulse-densitymodulations?b) What is the relaxation oscillator? Design an OpAmp based (comparator based) relaxationoscillator and explain how it works. Does it works in linear or nonlinear (saturation) region? Whatis the type of the output wave (sinusoidal, rectangular, square etc.)? How is the oscillationfrequency calculated? At the end, set the circuit parameters to the values that yields 1 kHzoscillation frequency.c) Which OpAmp building block converts a square wave into a triangle wave. Design this buildingblock with a sufficient output amplitude. Note the frequency of the output signal.d) Design an OpAmp building block that compares the triangle wave with a DC threshold voltage.e) Combine the relaxation oscillator (b), the waveform transformer (c), and comparator block in acascaded form. Set the circuit parameters that adjusts the threshold voltage in order to get D%dutycycle at the PWM output, where D is 22.

A positive voltage comparator, better known as a non-inverting comparator circuit detects when the…

Answered: d) Design an OpAmp building block that…

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d) Design an OpAmp building block that compares the triangle wave with a DC threshold voltage.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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