Inherent-offset comparator and converter systems

Details Inherent-offset comparator and converter systems Inherent-offset comparator and converter systems

2005-11-29

2005-11-29

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S161000

Reexamination Certificate

active

06970124

ABSTRACT:
Comparator systems are provided that include first and second differential pairs of transistors with inherent offsets that are a function of their tail currents. Some system embodiments configure the pairs to have substantially-equal, nonzero inherent offset voltages and other embodiments configure them to have substantially-zero inherent offset voltages. The systems further include a feedback network arranged to provide a second tail current to the second differential pair that substantially nulls the second output signal of this differential pair when it is driven by a reference signal. The feedback network generates an identical first tail current for the first differential pair which will now accurately compare an input signal to the reference signal.

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