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Discriminator Alarms Circuits
Designed by David A. Johnson, P.E.

Last Updated on: Sunday, July 27, 2008 07:41 PM
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  • 1uS LIGHT PULSE DISCRIMINATOR PLUS F TO V CONVERTER
    This circuit is designed to detect the narrow 1uS pulses produced by the above amplifier circuit. The clean logic type pulses produced by the discriminator are then sent to a frequency to voltage converter. The circuit is designed to process a pulse frequency of 10KHz that is frequency modulated by voice audio signals. The circuit is described in more detail in the receiver circuit section of my Handbook of Optical Through the Air Communications.  Note: Since the MF6-50 switched capacitor filter IC is no longer available; this circuit is for reference only.  Use circuit number Discriminator in place of the IC filter.


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