Oscillator circuit with the help of block diagram, Electrical Engineering

Assignment Help:

Q. Explain the conditions to be satisfied for sustained oscillations in an oscillator circuit with the help of block diagram.

The essential condition for sustained oscillations are :

· | AB | = 1,i.e. the magnitude of loop must be unity.

· The total phase shift around the closed loop is zero or 360 degrees.

The condition that | AB | = 1 gives a single and precise value of AB which should be set throughout the operation  of the oscillator circuit.But in practice,as transistor characteristics and performance of other circuit components change with time,|AB| will become greater or less than unity.Hence,in all practical circuits |AB| should be set greater than unity so that the amplitude of oscillations will continue to increase without limit but such an increase in amplitude is limited by the onset of the nonlinerarity of operation in the active device associated with the amplifier as shown in the figure above.In this circuit,AB is larger than unity for positive feedback.This onset of nonlinearity is an essential feature of all practical oscillators.

263_Oscillator circuit with the help of block diagram.png


Related Discussions:- Oscillator circuit with the help of block diagram

Find the current through the diode in the circuit, Q. A diode is connected ...

Q. A diode is connected in series with a voltage source of 5 V and a resistance of 1 k. The diode's saturation current is given to be 10 -12 A and the I-V curve is shown in Find

Explain state transition diagram, a. Explain State Transition Diagram and d...

a. Explain State Transition Diagram and define the various SDL symbols used in state transition diagram. b. Draw the signal exchange diagram for a local call used to show the se

LED, PRINCIPLE OF LED

PRINCIPLE OF LED

Explain stator of a synchronous machine, Explain Stator of a Synchronous Ma...

Explain Stator of a Synchronous Machine? The stator of a synchronous machine is made of thin laminations of highly permeable (silicon) steel in order to reduce the core losses.

What are the supplementary services, Q. What are the supplementary services...

Q. What are the supplementary services? new services are called supplementary services and some of the prominent ones are as below: Category 1: Abbreviateddialling

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

how does a colpitts oscillator works an also explain the principle

#titl4 bit binary addere.., Ask question #Madvantages of 4 bit binary adder...

Ask question #Madvantages of 4 bit binary adder inimum 100 words accepted#

Microcontroller, Project Garage door opener with password. Wrong password ...

Project Garage door opener with password. Wrong password "door close" on lcd screen, correct password "door open" on lcd Screen no need the motor. Material used - Microcontroller

Supernode, how does creating a supernode helps solve the problems?

how does creating a supernode helps solve the problems?

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