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

Clapp oscillator, derivation of frequency of oscillators clapp and derive C...

derivation of frequency of oscillators clapp and derive C effect?

Calculate the output torque, The power transferred across the air gap of a ...

The power transferred across the air gap of a two pole inductionmotor is 24 kW. If the electromag netic power developed is 22 kW, find the slip. Calculate the output torque if the

Explain direct data addressing mode, Direct data addressing mode (with exam...

Direct data addressing mode (with examples) available in microprocessors. Direct Mode: Instruction comprises memory access. CPU accesses which location into memo

Distinguish between harmonized and non-harmonized standards, (a) A digital ...

(a) A digital product is being tested for compliance to CISPR 22 Class A requirements. The receiving antenna is placed a distance of 30 m away and is attached to a 50 V receiver w

Diode transistor logic gate, A circuit realization of a NAND gate will now ...

A circuit realization of a NAND gate will now be developed. By connecting NAND gates together in various ways, one can synthesize other gates and flip-flops. Thus in principle, a s

Find the voltage, Q. The current sources in Figure are given to be I A = 3...

Q. The current sources in Figure are given to be I A = 30 A and I B = 50 A. For the values of R 1 = 20 ,R2 = 40 , and R3 = 80 , find: (a) The voltage V. (b) The current

Determine the resonant frequency and bandwidth, (a) For a series RLC resona...

(a) For a series RLC resonant circuit, find an expression for the voltage across the resistance VR and obtain the ratio V R /V S , where V S is the applied voltage. Identify the e

Step up chopper - power supplies , Step Up Chopper In this  chopper av...

Step Up Chopper In this  chopper average output  voltage  is greater than  input  voltage. The circuit  different  mode  of operation and  current  waveforms are show. When

Zener Diode, A Zener diode has the specifications VZ=6.8V and PDmax.=500mW....

A Zener diode has the specifications VZ=6.8V and PDmax.=500mW. Assume RZ=0. (a) Find the maximum allowable current iZ when the Zener diode is acting as a regulator. (b) If a sing

What is frequency translation and product modulation, Q. What is Frequency ...

Q. What is Frequency Translation and Product Modulation? The basic operation needed to build modulators is the multiplication of two signals. Whenever sinusoids are multiplied,

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