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Author Topic: An Interesting FM/AM Detector Using An NE567  (Read 3391 times)
TANAKASAN
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Posts: 933




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« on: September 28, 2012, 08:02:49 AM »

I was looking for a way to calculate NE567 Tone decoder values and I came across this interesting circuit:

http://www.amalgamate2000.com/radio-hobbies/radio/ne567_tone_decoder_as_am_fm___de.htm

OK, so it only works at 455 KHz but with one IC and eight other components you get a NBFM detector and a synchronous AM detector and no inductors required. Useful if board space is limited.

Tanakasan
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WB6BYU
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Posts: 13038




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« Reply #1 on: September 28, 2012, 09:33:04 AM »

Very interesting:  I'll have to try it out.  Allows a simple switch between AM and FM
output for a receiver.
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KB3HG
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Posts: 404




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« Reply #2 on: October 02, 2012, 08:15:11 AM »

Nice
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