Accession Number : ADD018465

Title :   Digital Circuit for the Introduction of Dither into an Analog Circuit.

Descriptive Note : Patent, Filed 25 Apr 94, patented 23 Apr 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Borgen, Gary S ; Houlberg, Christian L

Report Date : 23 Apr 1996

Pagination or Media Count : 25

Abstract : An electronics circuit for accurately digitizing an analog audio, video or like data signal into a fourteen bit digital equivalent signal/words having thirteen data bits and a sign bit and then introducing a dither component into the digital equivalent signal. A Read Only Memory which generates an eight bit dither component to be added to a selected eight bits of each fourteen bit digital equivalent sample. The combination of an automatic gain control circuit and a data selector circuit is provided which selects eight of the thirteen data bits of each sample to supply to a binary adder which adds the dither component to each sample. The eight selected bits of each thirteen bit data sample provide optimum video, audio or like information for the sample. A binary adder is also provided to add the dither component to each bit sample before providing the resultant signal to a missile's telemetry system.

Descriptors :   *ANALOG TO DIGITAL CONVERTERS, *PATENTS, *ERROR DETECTION CODES, GUIDED MISSILES, DATA TRANSMISSION SYSTEMS, WORDS(LANGUAGE), VIDEO SIGNALS, CIRCUIT ANALYSIS, READ ONLY MEMORIES, AUTOMATIC GAIN CONTROL, TELEMETER SYSTEMS

Subject Categories : Cybernetics
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE