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?You can see the related details of LM386 here: LM386 - NS/ - IC Chips - Kynix Semiconductor.
Also, do you know how to enable the reception of SSB signals? Do I need other designs?
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?You can see the related details of LM386 here: LM386 - NS/ - IC Chips - Kynix Semiconductor.
Also, do you know how to enable the reception of SSB signals? Do I need other designs?
For SSB reception you need a BFO and some means of mixing this with the incoming signal. My guess is that the ZN416 won't be very useful for SSB, unless you can extract an IF signal just before the AM detector.
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