Analogue to digital converter, and method of analogue to...

Details Analogue to digital converter, and method of analogue to... Analogue to digital converter, and method of analogue to...

2006-09-15

2008-05-13

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S161000, C341S162000, C341S163000

Reexamination Certificate

active

07372389

ABSTRACT:
Embodiments of the invention provide an analogue to digital converter comprising a dual differential digital to analogue converter (DAC) having first and second digital inputs for first and second digital input signals respectively, and having first and second analogue differential outputs for first and second differential output signals respectively, where the first and second digital output signals are associated with the first and second digital inputs respectively; storage for storing a DAC digital input value; logic for deriving the first and second digital input signals from the DAC digital input value, such that the difference between the first and second differential output signals from the DAC represents the DAC digital input value; a comparator for comparing the first and second differential output signals from the DAC with an analogue input signal and providing a comparator output; and a controller, responsive to the comparator output, for modifying the DAC digital input value such that the DAC digital input value substantially represents the analogue input signal.

REFERENCES:
patent: 5471208 (1995-11-01), Sauer
patent: 5831562 (1998-11-01), Van Auken et al.
patent: 6304208 (2001-10-01), Nagashima
patent: 6608580 (2003-08-01), Hsueh
patent: 7113749 (2006-09-01), Smith et al.

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