Why negative feedback is employed in wein bridge oscillator, Electrical Engineering

Assignment Help:

Q. Why negative feedback is employed in Wein Bridge Oscillator. Also explain the working of oscillator?

The Wein Bridge Oscillator consists of two stages of the RC coupled amplifier and a feedback network. The block diagram given in figure explain the principle of working of this oscillator. Here the two blocks are A1 and A2. These two represents two amplifier stages. The output of the second stage goes to the feedback network. The voltage across the parallel combination C2R2 is fed to the input of the first stage. First amplifier stages produce 1800 phase shift and the second amplifier also provides 1800 phase shift. Total phase shift is 3600 Therefore it is evident that for the oscillation to be maintained, the phase shift through the coupling network must be zero. It can be shown that this condition occurs at a frequency given by

1355_Why negative feedback is employed in Wein Bridge Oscillator.png


Related Discussions:- Why negative feedback is employed in wein bridge oscillator

Speed control of dc motor using pid, The objective of the project is to pro...

The objective of the project is to protect damage of the DC motors. If the motor is not working it will be shown with red light, if working normally then green and if working at a

Find the new operating point in transistor, Q. A transistor in a fixed bias...

Q. A transistor in a fixed bias amplifier circuit was replaced by another transistor of beta equaling 150 instead of 60.if IB of transistor is equal to 100 microampere and collecto

Explain digital control systems, Q. Explain Digital control systems? Si...

Q. Explain Digital control systems? Significant progress has been made in recent years in discrete-data and digital control systems because of the advancesmade in digital compu

#titleElectromagnetic Induction, Hello, I have some questions pertaining t...

Hello, I have some questions pertaining to electromagnetic induction. Could you please give me a hand? Thanks. If we increase the speed of the bar magnet slowly from 0 to 8, and

Calculate critical angel and fundamental gaussian mode, (1) An argon ion la...

(1) An argon ion laser, emitting light at a wavelength of 488nm with a beam divergence of 150 firad, is used to illuminate the moon. (i) Assuming the earth-to-moon distance is 3

Explain the types of power plants, Explain in detail the various energy res...

Explain in detail the various energy resources and their availability. Explain the following: (a) Types of power plants (b) Selection of power Plants

What is meant by thermal runaway in a transistor, Q. What is meant by therm...

Q. What is meant by thermal runaway in a transistor ? When current flows through the collector circuit, it produces heat at the collector junction. This increases the temperatu

Circuit theory, i want circuit theory relavant assingment sir please immed...

i want circuit theory relavant assingment sir please immediately

What is the advantage of using jfet as an amplifier, Q. What is the advanta...

Q. What is the advantage of using JFET as an amplifier? As an amplifier of small time-varying signals, the JFET has a number of valuable assets. First of all it has a very high

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