Low power bit and one-half analog to digital converter

Details Low power bit and one-half analog to digital converter Low power bit and one-half analog to digital converter

2005-11-22

2005-11-22

Wamsley, Patrick (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S172000, C327S337000

Reexamination Certificate

active

06967610

ABSTRACT:
A bit-and-one-half analog to digital converter comprises a switched capacitor circuit, including an opamp, that receives an analog input voltage and generates a residual analog output voltage. The switched capacitor circuit samples the analog input voltage during a sampling phase and generates the residual analog output voltage during an integration phase. A comparator generates a digital output based on the analog output voltage generated by the switched capacitor circuit. A current source communicates with the opamp and is operable to supply a first bias current to the opamp during the sampling phase and a second bias current that is greater than the first bias current to the opamp during the integration phase.

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