Analog-to-digital converter having offset removing function

Details Analog-to-digital converter having offset removing function Analog-to-digital converter having offset removing function

1998-05-14

2000-11-14

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341131, H03M 300

Patent

active

061476331

ABSTRACT:
In a delta-sigma type analog-to-digital converter, an offset varying during operation is removed, and a reduction in time required to generate a stable value after powering on the converter is achieved. A high pass filter is provided with a variable filter coefficient which can vary during operation. A filter coefficient controller supplies a coefficient control signal to the high pass filter to change the variable filter coefficient during operation, thereby altering the time constant of the high pass filter.

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patent: 5327137 (1994-07-01), Scheerer et al.
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