Analog-to-digital converter in which settling time of...

Details Analog-to-digital converter in which settling time of... Analog-to-digital converter in which settling time of...

2007-05-29

2007-05-29

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S120000, C341S156000, C341S161000, C341S162000, C341S172000

Reexamination Certificate

active

11299741

ABSTRACT:
A first amplifier circuit samples an input analog signal and holds the sampled signal for a predetermined period of time. A first analog-to-digital converter circuit samples the input analog signal and converts the sampled signal into a digital value of a predetermined number of bits. A first digital-to-analog converter circuit converts an output signal from the first analog-to-digital converter circuit into an analog signal. A first subtracting amplifier circuit with a capacitively coupled input receives a signal at one end of a capacitor connected to an input terminal of the subtracting amplifier circuit and which samples a signal occurring at the other end of the capacitor, the subtracting amplifier circuit subtracting an output signal from the first digital-to-analog converter circuit from an output signal from the first amplifier circuit, The first digital-to-analog converter circuit outputs the analog signal to the capacitor before a first switch is turned on, in order to adjust charges stored in the capacitor.

REFERENCES:
patent: 5274377 (1993-12-01), Matsuura et al.
patent: 6606042 (2003-08-01), Sonkusale et al.
patent: 6859158 (2005-02-01), Wada et al.
patent: 6891486 (2005-05-01), Pentakota et al.
patent: 04-026229 (1992-01-01), None

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