Accession Number : ADD007260

Title :   Digital to Analog Interface for Simultaneous Analog Outputs.

Descriptive Note : Patent,


Personal Author(s) : Connors,John P ; Nordmann,Bernard J ; Wainland,David M ; Bell,Henry P

Report Date : 06 May 1980

Pagination or Media Count : 7

Abstract : Interface circuitry for obtaining simultaneous, multi-channel analog outputs from a microprocessor, avoiding sequential addressing delays. The technique involves inserting, for each analog output channel, a buffer latch between the data bus lines from the microprocessor and the D/A latch associated with the D/A converter. The buffer latches are sequentially addressed by control logic circuitry and loaded from the computer memory in accordance with software instructions in the microprocessor. While data is being loaded in the buffer latches, the D/A latches are disabled, preventing the data from being presented to the D/A converters. When all channels are loaded, the D/A latches are strobed simultaneously, enabling them and transferring the data stored in the buffer latches to the D/A converters for conversion to analog outputs. (Author)

Descriptors :   *Patents, *Digital to analog converters, Input output devices, Synchronizing switches

Subject Categories : Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE