Design of multi channel gain-control signal preprocessing equipment

The 32 channels of underwater acoustic signal preprocessing device was designed. It could accord to the upper computer commands to control the gain of one or a few channels. Or it could be controlled the gain of all the channels manually. Based on consideration of the modularization and standardization, motherboard and signal preprocessing circuit board was designed. Motherboard designed primarily use C8051 SoC. It implements the commands receiving and signal gain controlling, etc. The signal preprocessing circuit board implements signal amplification and filtering. Signal amplification has seven gains to choice. Filter designed for modularization. It has same package but different frequency. It could accord to the signal frequency to choose a different filter.