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

Colpitts oscillator, how does a colpitts oscillator works an also explain t...

how does a colpitts oscillator works an also explain the principle

Hysteresis results in a dissipation of energy, Hysteresis results in a diss...

Hysteresis results in a dissipation of energy Hysteresis results in a dissipation of energy which appears as a heating of the magnetic material. The energy loss associated wit

Forward voltage triggering , Forward Voltage  Triggering If V a is i...

Forward Voltage  Triggering If V a is increased the collector to emitter voltages of both  transistor are  also increased. Hence  the leakage current at J 2 increase. This

Transfer function of time multiplexer, How wood a transfer function of a ti...

How wood a transfer function of a time-multiplexer with switching in 10 kHz between 2 channels look like?

Explain the importance of planning in an organisation, Question 1: Plan...

Question 1: Planning is one of the primary functions of management. (a) Explain the importance of planning in an organisation. (b) How can managers develop an effective a

Explain the suitability of copper, Explain  the  suitability  of  coppe...

Explain  the  suitability  of  copper that  is  used  as  electrical  conducting materials. Copper : Pure annealed is utilized for the winding of electrical machines. High pur

Rms values, 1. Derive the necessary formula/method to determine the effect...

1. Derive the necessary formula/method to determine the effective value or RMS of a triangular wave. Use either a similar method to the class example of the RMS determination

Find an expression for the instantaneous force, Q. Let the solenoid carry a...

Q. Let the solenoid carry an alternating current of 10 A (rms) at 60 Hz instead of the direct current. Find an expression for the instantaneous force.

Voltage divider bias, Voltage divider bias: The voltage divide...

Voltage divider bias: The voltage divider is made by using external resistors R 1  and R 2 . The voltage beyond than R 2  forward biases the emitter junction. Via prop

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