FREQUENCY-MODULATION DEMODULATOR THRESHOLD EXTENSION DEVICE
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Abstract
OCCURRENCE OF A CLICK-TYPE NOISE IMPULSE AND SWITCHING THE FOLLOW AND HOLD CIRCUIT TO THE HOLD CONDITION, WHEREBY THE SIGNAL TRNSFERRED TO THE OUTPUT FILTER IS HELD AT THE LAST PREVIOUT NONCLICK VALUE DURING THE OCCURRENCE OF THE CLICK IMPULSE.
A THRESHOLD EXTENSION DEVICE IS CONNECTED BETWEEN THE OUTPUT OF A FREQUENCY-MODULATION DEMODULATOR AND THE INPUT OF THE CUSTOMARY DEMODULATOR OUTPUT FILTER FOR PURPOSES OF MINIMIZING THE OCCURRENCE OF IMPULSE NOISE, USUALLY REFERRED TO AS "CLICK" NOISE, AT THE OUTPUT OF THE OUTPUT FILTER. THE DEVICE INCLUDES A CLICK-CLIMINATING SIGNAL TRANSFER CHANNEL HAVING A FOLLOW AND HOLD CIRCUIT. THE DEVICE ALSO INCLUDES AMPLITUDE-SENSITIVE CLICK DETECTOR CIRCUITRY FOR DETECTING THE
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