FM receiver on the KA22429 chip. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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FM receiver on the KA22429 chip. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / radio reception

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A very small receiver, it does not have electrolytic capacitors and other large parts. In the factory, it was mounted in a case from a floppy disk (only 1,5-2 times thicker), it had a built-in amp that worked for headphones, and there was still room left!

FM receiver on a KA22429 chip

This is a typical switching circuit and therefore there is no exact data on the coils, it is known that their inductance = 0,056 μH.

The chip is small (10x4x1.5 mm). In the factory version, SMD resistors, and capacitors and coils are recessed into holes on the board and almost do not stick out of it.

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