Accession Number : AD0438133

Title :   AUDIO PULSE CANCELLATION FILTER.

Corporate Author : GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Report Date : APR 1964

Pagination or Media Count : 24

Abstract : An audio pulse cancellation filter is described. The device provides an interference suppression capability for certain cases of co-channel pulse interference in amplitude modulated communication receivers. The circuit consist of an oscillator which is phase locked to the fundamental component of an interfering pulse signal and the necessary delay and pulse generators to provide the capability for adding this locally generated pulse to the audio output signal of the receiver so as to effect a reduction in the amplitude of the interfering pulse signal. Circuit details are discussed and results of tests are presented. (Author)

Descriptors :   (*RADIOFREQUENCY FILTERS, RADIO RECEIVERS), (*RADIO RECEIVERS, AMPLITUDE MODULATION), (*RADIOFREQUENCY INTERFERENCE, RADIO RECEIVERS), OSCILLATORS, PHASE LOCKED SYSTEMS, PULSE GENERATORS, PHASE DETECTORS, VOLTAGE, TUNING DEVICES, FREQUENCY, ATTENUATION, TRANSISTORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE