The Design of Wide Dynamic Audio Automatic Gain Control Circuit

In military and civilian equipments,acceptor circuit of the equipment can receive changeable radio signals.It leads to non-constant audio signals,and it is difficult to handle audio signals in the following circuits.It must take relative audio dynamic compression technology.The paper introduces the automatic gain control technology for the satisfied audio variation range.The step by step digital control technology has been adopted in the circuit,and has realized automatic gain control.The paper gives the design idea for the circuit,and introduces the working principle and structure.The compression of wide dynamic input signal has been realized,and it meets the needs of various gain control.