Accession Number : ADD001106
Title : Frequency Discriminator with Variable Center Frequency.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C
Personal Author(s) : Madert,Franz Peter
Report Date : 06 Feb 1973
Pagination or Media Count : 3
Abstract : The patent describes a discriminator in which the frequencies of a reference oscillator, a voltage controlled oscillator and a signal source are all converted to dc voltages proportional to their individual frequencies. The voltages from the signal and the voltage controlled oscillator are summed in a summing amplifier and fed to one input of a differential amplifier. The other input of the differential amplifier is fed by the dc voltage from the reference oscillator. The dc output of the differential amplifier is used to control the variable controlled oscillator so that its frequency output will be different from the reference oscillator's frequency output by the frequency of the signal.
Descriptors : *Discriminators, *Patents, Frequency, Variations, Converters
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE