--%>
Assignment Help - homework help

  Functions of AVC

Introduction to Functions of AVC

1st function is it amplifies the voltage and current of the audio signal.

2nd function is it operates speaker.

3rd function is it enhances the fidelity of the receiver.

Audio section is divided as follows in the receivers:

1. Pre - Amplifier

2. Driver - Amplifier

3. Output Amplifier

PRE - AMPLIFER

It acts like first voltage amplifier. Output of the detector is provided to this amplifier. It amplifies the audio signal's voltage. The output of it is fed to drive stage.

DRIVER AMPLIFIER

It acts like second voltage amplifier. It is used among pre and output amplifiers. The AF signal is amplified by it and fed it to the output amplifier by driver amplifier.

TWO STAGE VOLTAGE AMPLIFIER

Two stage voltage amplifiers amplify the voltage of AF signal and therefore it is termed as voltage amplifier. Two stage voltage amplifiers is a RC coupled amplifier. AF signal is acquired by volume control and C1 (0.1 mfd) and feed to the base of Q1 . The base and collector bias voltages are supplied through R1 (1 Mega ohm ) and R2 (2.2 K) correspondingly. The AF signal amplified by Q1. The outcome is feed to the base of Q2 by C2 . The Q2's base and collector bias voltages are supplied through R3 (220 K) and primary of driver transformer correspondingly.Q2 amplifies the AF signal further. C4 (0.01 mfd) works like a high frequency filter that is also termed as tone correction capacitor. The second most of driver transformer is the input to the push pull output amplifier. C1 and C2 work like coupling capacitors

466_Functions of AVC Homework Help.jpg

OUTPUT AMPLIFIER

Output amplifier is the last amplifier in audio section. Output amplifier amplifies the power of audio signal. Thus, it is termed as power amplifier. Output amplifier drives the speaker. AF output amplifier is categorized into two types.

i) Push pull amplifier using transformer

ii) Complementary symmetry amplifier.

PUSH - PULL AMPLIFIER

Push - pull amplifier is a single end push-pull amplifier. Within this stage two similar transistors are employed. To them two input signals are applied. A driver transformer is employed in input section of it. In the output part of this amplifier a speaker is employed. This speaker is attached by a capacitor. It is a hum free amplifier.

Latest technology based Electrical Engineering Online Tutoring Assistance

Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Functions of AVC homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Functions of AVC, project ideas and tutorials. We provide email based Functions of AVC homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Functions of AVC. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Electrical Engineering homework help and assignment help services. They use their experience, as they have solved thousands of the Electrical Engineering assignments, which may help you to solve your complex issues of Functions of AVC. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.