PLL調(diào)頻解調(diào)器(LM565CN、RC4558DN)
如圖所示電路采用LM565CN構(gòu)成10kHz±3kHz的調(diào)頻解調(diào)電路。將V1和V2的差分解調(diào)輸出用圖(b)的A1差分放大器進(jìn)行電平位移并放大,再由A2構(gòu)成的有源LPF濾除20kHz的脈動(dòng)分量。
PLL調(diào)頻解調(diào)器(LM565CN、RC4558DN) src="/21ic_image/21icimage/200903/1813061f5e7ec3646546b37fe4556628.jpg" width=600 border=0>