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