【回路：TBA120Uと言うICをSSB検波に使う】 abstract TBA120U is for PAL-TV  system, but you can use it for FM radio receivers First, I used FM IF-Amplifier to check the IC I got. After that, I tried SSB detector, but the crystal oscillator circuit with the IF amplifier part needs to be examined. After some trial and error, I had good results.  I think the resulting SSB detector has a good performance. (