Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1997-07-07
1999-02-09
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
375317, H03M 166
Patent
active
058700471
ABSTRACT:
A signal converter (20) processes an incoming digital data stream (24) to produce an analog signal (26). A pulse shaping network (28) is configured to receive the incoming digital data stream (24) and generate a plurality of subset data streams (30). A precompensation network (32) then crosscouples the subset data streams (30) to produce crosscoupled data streams (38). Each of crosscoupled data streams (38) are then converted by respective ones of digital to analog converters (22) to produce intermediate analog signals (44). The intermediate analog signals (44) are summed by an operational amplifier (46) to produce the analog signal (26). The precompensation network (32) can be combined with the pulse shaping network (28) by using a common look-up memory element (70) to perform both functions.
REFERENCES:
patent: 3839675 (1974-10-01), Wernikoff et al.
patent: 3928809 (1975-12-01), Tschudi et al.
patent: 4245345 (1981-01-01), Gitlin et al.
patent: 5533073 (1996-07-01), Rriksson
patent: 5600678 (1997-02-01), Petranovich et al.
Gresham Lowell W.
Jean Pierre Peguy
Meschkow Jordan M.
SiCOM, Inc.
Williams Howard L.
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