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

Fault analysis, The one line diagram of a simple three phase power system i...

The one line diagram of a simple three phase power system is shown in figure below. Each generator is represented by an emf behind the transient reactance. All impedances are expre

Obtain plots by using probe, Q. A dc source is connected to a series RLC ci...

Q. A dc source is connected to a series RLC circuit by a switch that closes at t = 0, as shown in Figure, with initial conditions. For the values of R = 20, 40, and 80 , solve for

Give the basic structure of a basic dma module, a) Give four features that ...

a) Give four features that were traditionally reserved to RISC architectures? b) Determine the overall throughput for 21 sequential instructions assuming a four-stage pipeline a

Discuss in detail about pulse broadening graded index wave, Discuss in deta...

Discuss in detail about pulse broadening in graded index waveguide ? Intermodal dispersion within multimode fibers is minimized along with the use of graded index fibers, ther

Find in wavelengths how long the line, Q. A transmission line with air diel...

Q. A transmission line with air dielectric is 25 m long. Find, in wavelengths, how long the line is at frequencies of 1 kHz, 10 MHz, and 100 MHz.

Direct and indirect semiconductors, Direct and Indirect Semiconductors ...

Direct and Indirect Semiconductors 1) In a common quantitative calculation of band structures, the wave function of a single electron traveling by a perfectly periodic lattice

Compute the source current, Q. A 230-V, single-phase, 60-Hz source supplies...

Q. A 230-V, single-phase, 60-Hz source supplies two loads in parallel. One draws 10 kVA at a lagging power factor of 0.80 and the other draws 6 kWat a lagging power factor of 0.90.

Determine the voltages vx using voltage division, Q. Determine the voltages...

Q. Determine the voltages Vx using voltage division and equivalent resistor reductions for the circuits shown in Figure.

Low pressure gas hazards, Low Pressure Gas Hazards : Safety screens and wi...

Low Pressure Gas Hazards : Safety screens and wire-mesh guards should be placed round evacuated glassware and safety goggles or a face shield must be worn against the possibility

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