Accession Number : ADD013023

Title :   Pulsewidth Modulated, Charge Transfer, Digital to Analog Converter.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Slump,William R

Report Date : 07 May 1985

Pagination or Media Count : 4

Abstract : A microprocessor-driven pulsewidth modulated, charge transfer, digital to analog converter for use in a sample data system. During the sample period a capacitor is charge to an error signal value which is the difference between the output of an operational amplifier and an average DC voltage proportional to the sampled digital data. During the hold mode, the charge on the capacitor is transferred to a capacitor of smaller value connected between the input and output of the operational amplifier. This provides an error update during the hold period, permitting the circuit to be used with a computer on a time shared basis. (Patents).

Descriptors :   *PATENTS, *DIGITAL TO ANALOG CONVERTERS, *CHARGE TRANSFER, CAPACITORS, INFORMATION SYSTEMS, OPERATIONAL AMPLIFIERS, DATA BASES, DIGITAL SYSTEMS, SAMPLING, DIRECT CURRENT, ERRORS, SIGNALS

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE