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本例中的电路采用Analog Devices公司的AD630平衡调制解调IC实现了一种简单的低成本锁入放大器(参考文献1)。该器件使用激光微调薄膜电阻,这带来了很高的准确性和稳定性,并因此产
The circuit in this example uses Analog Devices AD630 balanced modem ICs to implement a simple low cost lock in amplifier (Reference 1). The device uses a laser trimmer thin film resistor, which brings a high degree of accuracy and stability, and therefore