Accession Number : ADD002848
Title : Hybrid Sample Data Filter.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C
Personal Author(s) : Franks,Lewis E
Report Date : 15 Jun 1976
Pagination or Media Count : 6
Abstract : The patent relates to a sample data filter using a delta modulator to feed a shift register of which selected outputs are pulsewidth weighted. Each of the coefficient multipliers include a flip-flop fed by one of the taps of the shift register and triggered by a clock. A synchronous counter, common to each of the multipliers, is fed to a NAND gate that clears the flip-flop. Interposed between the counter and the NAND gate are a series of switches, one for each stage of the counter. The flip-flop controls a switch to a source of reference voltage and the output of this switch controlled voltage from each of the multipliers is summed and fed to a demodulator.
Descriptors : *Filters, *Patents, Hybrid systems, Modulators, Delta modulation, Shift registers, Flip flop circuits, Nand gates, Coding, Demodulators
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE