Accession Number : ADD016462

Title :   Digital Circuit for the Introduction and Later Removal of Dither From an Analog Signal.

Descriptive Note : Patent, Filed 15 Jan 93, patented 10 May 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Borgen, Gary S

Report Date : 10 May 1994

Pagination or Media Count : 20

Abstract : An electronics circuit for accurately digitizing an analog audio or like data signal into a digital equivalent signal by introducing dither into the analog signal and then subsequently removing the dither from the digitized signal prior to its conversion to an analog signal which is a substantial replica of the incoming analog audio or like data signal. The electronics circuit of the present invention is characterized by a first pseudo-random number generator which generates digital random noise signals or dither for addition to the digital equivalent signal and a second pseudo-random number generator which generates subtractive digital random noise signals for the subsequent removal of dither from the digital equivalent signal prior its conversion to the analog replica signal

Descriptors :   *ANALOG SIGNALS, *PULSE CODE MODULATION, *SIGNAL PROCESSING, CIRCUITS, CONVERSION, ELECTRONICS, INVENTIONS, NOISE, RANDOM NUMBER GENERATORS, REMOVAL, REPLICAS, PATENTS

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE