How linear sweep voltage is generated, Electrical Engineering

Assignment Help:

Q. With a suitable block circuit, show how linear sweep voltage is generated ?

2392_How linear sweep voltage is generated.png


The above figure shows a basic sweep waveform generator. The switching action of the switch causes the capacitor C to be alternately charged and discharged. The waveform generated by this basic circuit is not exactly linear, even if the ratio of the sweep voltage Vs and the supply voltage V is kept high. However, the linearity can be improved if feedback arrangement is made with this basic circuit.

Feedback can be improved if an auxiliary variable voltage generator va is introduced in such a way that variable voltage va is always equal to voltage developed across capacitor C.

1519_How linear sweep voltage is generated1.png

 Applying Kirchoff's voltage law to the circuit shown,

V - iR - vc + va = 0

iR = V    ,  if vc = va

i = V/R

i.e. the charging current i is independent of charging capacitor C and is constant.

Voltage across capacitor , vc = [V/CR] t

Hence, by introducing an auxiliary variable voltage generator in the basic R-C series circuit in the above manner, perfect linearity can be achieved in the output waveform of the circuit.


Related Discussions:- How linear sweep voltage is generated

What are the kinds of transformations, What are the kinds of transformation...

What are the kinds of transformations? Illustrate each with the help of homogeneous matrix form in 3-D.

Research publication, i need research publication help. The topic is PHASED...

i need research publication help. The topic is PHASED ARRAY ANTENNA DESIGN for KU-band. I want a research paper that can be published in some conference.

Determine the maximum value of the voltage, Q. Three waveforms seen on an o...

Q. Three waveforms seen on an oscilloscope are shown in Figure. If the horizontal scale is set to 50 ms per division (500 ms for the entire screen width), and the vertical scale is

Electrical engineering, 4. Modify the circuit designed for question 3 to pr...

4. Modify the circuit designed for question 3 to provide an emergency stop which will park both cylinders in the extended position (i.e. A + B +). 5. Modify the circuit designed fo

Electricity hazards in the laboratory, ELECTRICITY HAZARDS IN THE LABOR...

ELECTRICITY HAZARDS IN THE LABORATORY : You've probably read about, or heard of, people falling onto high voltage rails or cables and surviving thousands of volts. As a contra

Elementary induction machines, Elementary Induction Machines In the dis...

Elementary Induction Machines In the discussion that followed Equation, the third possiblemethod of producing constant torque was to cause the mmf axes of stator and rotor to r

Microcontroller project, hi there, i have to write a program for seven seg...

hi there, i have to write a program for seven segments counter with three buttons to make it counting up and down from 00 to 99 so i''m looking for someone can write it..........th

Differences between vga and cga graphics adapters, Q.9 What are the main...

Q.9 What are the main differences between VGA and CGA graphics adapters? Ans: Colour Graphics Adapter (CGA), initially also known as Colour/Graphics Adapter or IBM Colo

Find the antenna temperature, Q. If an antenna has an available noise power...

Q. If an antenna has an available noise power of 1.6 × 10 -15 W in a 1-MHz bandwidth, find the antenna temperature.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd