Analog-digital conversion method and analog-digital converter

Details Analog-digital conversion method and analog-digital converter Analog-digital conversion method and analog-digital converter

2006-08-01

2006-08-01

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S163000, C341S156000

Reexamination Certificate

active

07084803

ABSTRACT:
A first amplifier circuit amplifies an input signal by a factor of α. A first AD converter circuit is configured at an LSB voltage of VA and converts an input analog signal into a digital value of arbitrary N1bits. A first DA converter circuit converts the digital value output from the first AD converter circuit into an analog signal. A subtracter circuit subtracts an output of the first DA converter circuit from an output of the first subtracter circuit. A second amplifier circuit amplifies an output of the subtracter circuit by a factor of β. A second AD converter is configured at an LSB voltage of VB and converts an input analog signal into a digital value of arbitrary N2bits. In this circuit, the relation VA*α*β=VB*2N2holds.

REFERENCES:
patent: 6195032 (2001-02-01), Watson et al.
patent: 6879277 (2005-04-01), Cai
patent: 2004/0070530 (2004-04-01), You
patent: 04-026229 (1992-01-01), None

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