Sandy Bmorales Morales

US Patent:

52686884, Dec 7, 1993

Filed:

May 13, 1992

Appl. No.:

7/882212

Inventors:

Clifford W. Meyers - Rancho Palos Verdes CA
Sandy A. Morales - Hermosa Beach CA
Gene Rzyski - Cypress CA
Mark M. Osugi - Long Beach CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

H03M 166

US Classification:

341143

Abstract:

Linear signal reconstruction systems and methods that use mathematical relationships that exist between discrete time signals, digital to analog conversion characteristics and digital signal processing to produce a highly accurate, low noise, arbitrary analog signal from a discrete digital representation. This analog signal is produced by connecting discrete digital voltages through the use of a segmented straight line curve fit. This approach significantly reduces out of band harmonics that are normally associated with the stair-step approach while improving the output signal amplitude and phase accuracy. More specifically, the present system and method provides for reconstructing original analog signals from a digitized representation thereof. Digitized signals corresponding to the original analog signals are differentiated and then D to A converted into differentiated analog signals. The differentiated analog signals are then integrated to provide for reconstructed analog signals that correspond to the original analog signals.