Dual-use comparator/op amp for use as both a...

Details Dual-use comparator/op amp for use as both a... Dual-use comparator/op amp for use as both a...

2008-12-30

2010-06-22

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to digital conversion followed by digital to analog...

C341S155000, C341S144000

Reexamination Certificate

active

07741981

ABSTRACT:
A re-configurable circuit acts as an Analog-to-Digital Converter (ADC) and as a digital-to-analog converter (DAC). An array of binary-weighted capacitors stores an analog input. Switches connect different capacitors in the array to fixed voltages that cause charge-sharing with a terminal capacitor. The voltage of the terminal capacitor is compared by a re-configurable comparator stage for each different combination of the capacitors. The comparison results are analyzed to determine the closest digital value for the analog input. In DAC mode, the array capacitors are switched based on an input digital value. The switched capacitors connect to a charge-sharing line to generate an analog voltage that is applied to the re-configurable comparator stage. A differential amplifier generates a buffered analog voltage that is fed back to the other input of the re-configurable comparator stage for unity gain. The gain of the re-configurable comparator stage adjusts for ADC and DAC modes.

REFERENCES:
patent: 4609906 (1986-09-01), Wiegel
patent: 5995033 (1999-11-01), Roeckner et al.
patent: 6255972 (2001-07-01), Gross, Jr. et al.
patent: 6359575 (2002-03-01), Knudsen
patent: 7138932 (2006-11-01), Chen
patent: 7265705 (2007-09-01), Lee et al.
patent: 7471227 (2008-12-01), Cho

Affiliated with

Also associated with

Rating

Dual-use comparator/op amp for use as both a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual-use comparator/op amp for use as both a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual-use comparator/op amp for use as both a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4185079