This circuit is from 1964 documentation but can be easily implemented based on current components. Input waveforms and detection are shown next to the diagram.
January 2017 - Mouser Electronics already has in stock the Epson TCXO TG2016 crystal oscillators for use...
We found this automotive alarm circuit in a 90's Popular Electronics circuit. The circuit emits a...
September 2017 - Texas Instruments PCM186x and PCM186x-Q1 Audio ADCs can be found at Mouser...