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user 111851
A filter selectively processes input signals in frequency- or time-domain.
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Do narrow-band single-chip bandpass filters for audio frequencies exist?
I am looking for a single-chip implementation of a bandpass filter for audio frequencies, but unsure if they even exist. All the filters I've seen seem to be at least in hundred KHz range. … An ideal filter would be something like:
A single-chip implementation with minimum extra elements added;
Reasonably priced (let's say under $10 a piece in bulk);
Narrow enough (+/-500 Hz is fine for …
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