Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1989-03-15
1990-07-17
Shoop, Jr., William M.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
341159, 341135, H03M 136
Patent
active
049423991
ABSTRACT:
A differential analog input signal is level-shifted and converted to single-ended form. Its average value is compared to the midpoint of a set of reference voltages. A control signal proportional to the average value forces the average of the single-ended signal toward the midpoint voltage. The single-ended signal is converted to uncoded digital form by a parallel comparator bank, and is then converted to coded digital form.
REFERENCES:
patent: 4229729 (1980-10-01), Devendorf et al.
patent: 4649372 (1987-03-01), Abe et al.
patent: 4777472 (1988-10-01), Sauer et al.
Buchholtz Timothy C.
Gruver Michael R.
Richetta Raymond A.
Schmerbeck Timothy J.
Anglin J. Michael
International Business Machines - Corporation
Logan Sharon D.
Shoop Jr. William M.
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