Implementation of Automatic Gain Control Circuit Based on AD603 Chip

DOI

10.2991/978-94-6463-518-8_38How to use a DOI?

Keywords

Automatic Gain Control Amplifiers; Variable Gain Amplifier; Radio Follower

Abstract

Automatic gain control circuits (AGC) are important control circuits in communication, broadcasting and radar systems. In this paper, through theoretical analysis, simulation and circuit debugging, an automatic gain adjustment amplifier circuit whose output is stabilized at a specified voltage value is designed and implemented. The circuit uses the principle of constant current source to monitor the output of variable gain amplifier (VGA), and feeds back the difference between the output voltage and the set value to the gain control terminal of the VGA, so as to realize the function of automatic gain adjustment. In order to improve the bandwidth capability, an emitter follower is connected to the output of the AGC circuit, and a Darlington tube is selected to replace the transistor therein, thus further improving the bandwidth capability of this circuit. In addition, a full-wave rectifier and voltage regulator circuit is used to provide a stable voltage for this circuit. Through experimental testing and verification, the circuit achieves the function of stable output of specified voltage peak-to-peak waveforms under different input frequencies and input voltages, and realizes the design requirements.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Yuankai Gao
PY  - 2024
DA  - 2024/09/28
TI  - Implementation of Automatic Gain Control Circuit Based on AD603 Chip
BT  - Proceedings of the 2024 International Conference on Mechanics, Electronics Engineering and Automation (ICMEEA 2024)
PB  - Atlantis Press
SP  - 391
EP  - 403
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-518-8_38
DO  - 10.2991/978-94-6463-518-8_38
ID  - Gao2024
ER  -