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Low distortion AGC amplifier (AD824) diagram

2015-01-04 17:32  
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Low distortion AGC amplifier (AD824) diagram
In communications, control and remote sensing system, the low distortion automatic gain control circuit is needed. As shown in diagram, the circuit is the low-distortion AGC amplifier. A1 is the amplifier. A2 is the voltage following device, which is used asisolation level to introduce feedback for amplifier A1. Integrated amp in (A) can be proper selected according to actual needs. If you hope the single power supply, you can choose low powerfour operational amplifiercircuit AD824A or AD824B; If you hope to adopt double power supply, you can use μPC4074 four operational amplifier integrated chip.