Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1992-05-13
1993-12-07
Hoff, Marc S.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
341144, H03M 166
Patent
active
052686884
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.
REFERENCES:
patent: 3956700 (1976-05-01), Condon
patent: 4214231 (1980-07-01), Donnally
patent: 5068661 (1991-11-01), Kaneaki et al.
Meyers Clifford W.
Morales Sandy A.
Osugi Mark M.
Rzyski Gene
Alkov L. A.
Denson-Low W. K.
Hoff Marc S.
Hughes Aircraft Company
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