Audio Discriminator Circuit

FM Ratio Detector / Discriminator Circuit - Electronics Notes

https://www.electronics-notes.com/articles/radio/modulation/fm-frequency-demodulation-ratio-detector-discriminator.php

Getting Discriminator (Flat) Audio Out of a MaxTrac 5-pin ...

https://www.repeater-builder.com/motorola/maxtrac/maxtrac-discr-audio.html

With help from Bob WA1MIK, I recreated the circuitry in the 16-pin logic boards to give me a discriminator audio output identical to what was present in those boards. I made a small circuit board to hold the parts and stuffed it up inside the control head in place of the loudspeaker.

Discriminator output - The RadioReference Wiki

https://wiki.radioreference.com/index.php/Discriminator_output

The Discriminator output from a scanner is the raw, unfiltered signal that a scanner produces before it is sent to the audio stage for output through the speaker -- also called the "baseband audio." This discriminator source is required for applications such as Trunker , T4Win , UniTrunker , and DSD .

GB2144004A - FM discriminator circuits - Google Patents

https://patents.google.com/patent/GB2144004A/en

Foster Seeley Discriminator: FM Detector Demodulator ...

https://www.electronics-notes.com/articles/radio/modulation/fm-frequency-demodulation-foster-seeley-detector-discriminator.php

Audio Discriminator Tap Hardware Specs | RadioReference ...

https://forums.radioreference.com/threads/audio-discriminator-tap-hardware-specs.220190/

Ideally, to yield completely raw discriminator output across the whole audio range (including sub-audible signals) you don't want any filtering (in the tap circuit) so as to allow the software to have full access to all possible discriminator output. In some cases, though, filtering can help but then you should really know exactly what the load ...

Scanner Data Decoding by Discriminator output - AX CB ...

https://alphaxray.info/radio-scanner-hobby/2016/scanner-data-decoding-by-discriminator-output.html

Glass Break / Audio Discriminator - SECO-LARM

http://www.seco-larm.com/E-190

Glass Break / Audio Discriminator. Add to Compare. Model Number: ENFORCER 190. Eliminates the need for unsightly individual detectors on each pane of glass. Detects the high-frequency sound of glass breaking. Patented yellow turbulence LED allows quick and simple sensitivity adjustment without having to use a test meter.

Foster Seeley Discriminator - Radio receivers - Amateur ...

https://www.radioexperimenter.us/radio-receivers/fosterseeley-discriminator.html

General discussion. Now look at the diagram of a Foster-Seeley discriminator above, sometimes called a phase discriminator. This type is in common use. The output of the limiter is transformer-coupled to the discriminator. The primary and secondary of the transformer are parts of resonant circuits, tuned to the IF signal resting frequency.