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Old 04-05-2017, 10:02 AM   #1
April155
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Default Why does my LM386 chip act a bit too lively and what should I do?

I'm trying to design a superhet radio receiver that can be built up in sections, and now I met some problems.

The receiver is based on the AN602 double-balanced mixer IC, with the big brother of the ZN414 (the 10-transistor radio chip), the ZN416, employed as an IF amplifier, coupled with a standard LM386 audio stage . Power-supply requirements are 9 to 12 volts dc at 10 mA average (up to 30 mA at full volume).

As the LM386 is almost a standard chip for audio use, the only caution revolves around the 10-mF gain-setting capacitor. But what should I do if my LM386 seems a bit too lively?

Also, do you know how to enable the reception of SSB signals? Do I need other designs?
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