Accession Number : ADD018480

Title :   Digital Audio Signal Processing Circuit.

Descriptive Note : Patent, Filed 12 Jun 92, patented 25 Jul 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Borgen, Gary

Report Date : 25 Jul 1995

Pagination or Media Count : 10

Abstract : A digital audio signal processing circuit eliminates the amplitude and phase components of logic induced modulation from a left right clock signal, a bit clock signal and digital data bits generated by a digital signal processor within a compact disk player. The digital audio signal processing circuit includes a trio of optical couplers for removing the amplitude component of logic induced modulation from the left right clock signal, the bit clock signal and the digital data bits; a clock circuit for generating a system clock signal and a trio of D Flip Flops for removing the phase component of logic induced modulation from the left right clock signal, the bit clock signal and the digital data bits and a digital to analog converter for separating the data bits into left channel data bits and right channel data bits and for converting the left channel data bits into a first analog signal and the right channel data bits into a second analog signal for use by speakers or the like to provide stereo sound. An isolated power supply provides both analog and digital voltages to the electronic elements of digital audio signal processing circuit.

Descriptors :   *SIGNAL PROCESSING, *INTEGRATED CIRCUITS, *PATENTS, DATA BASES, CLOCKS, ELECTRONIC EQUIPMENT, ISOLATION, VOLTAGE, THREE DIMENSIONAL, OPTICAL WAVEGUIDES, SIGNALS, SOUND, POWER SUPPLIES, FLIP FLOP CIRCUITS, MODULATION, LOGIC, AMPLITUDE, CHANNELS, ANALOG SIGNALS, DIGITAL TO ANALOG CONVERTERS, COMPACT DISKS, WAVEGUIDE COUPLERS

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE