新型多路数控增益放大器

Development of a Novel Amplifier with Multi-channel and Digitally Controlled Gain

介绍了一种新型多路数控增益放大器。该放大器具有8路模拟信号输入通道,采用3位数字信号控制通道位;每个通道均具有256级增益控制,采用8位数字信号控制放大倍数;输入信号采用绝对值处理电路,具备极性判别信号输出。采用多芯片微组装技术实现,体积小、重量轻,可用做小型微机处理电路的模拟接口芯片。简要介绍了基于该放大器的某设备控制与保护系统的应用示例。

This paper introduces a new type of multi-channel and digitally controlled gain amplifier. It possesses 8 input channels of analog signals and adopts a 3-bit digital signal to control the No. of channel. For each channel, there are up to 256 levels of gain and a 8-bit digital signal is used to control the gain. The input signal adopts an absolute value processing circuit with an output of polarization judgement signals. The amplifier is produced with the technology of multi-chip micro-assembly, which features small volume, lightweight and can be used as analog interface chip for microcomputer processing circuit. An example for equipment control and protection system based on this amplifier is also presented in this paper.