AD637很好的真有效值检测电路！我就是照图作出的：测试的比例关系，三角波1.716---1，方波1--1，正弦波1.46--1.

FEATURES High accuracy 0.02% maximum nonlinearity,0 V to 2 Vrms input 0.10% additional error to crest factor of3 Wide bandwidth 8 MHz at 2Vrms input600 kHz at 100 mVrms ComputesTrue rms Square Mean square Absolute value dB output (60 dB range) C