Analog-to-digital converters employing cascaded...

Details Analog-to-digital converters employing cascaded... Analog-to-digital converters employing cascaded...

2007-07-24

2007-07-24

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S136000, C455S326000, C455S333000

Reexamination Certificate

active

11356412

ABSTRACT:
2N−1 four-terminal phase-reversing switches are arranged in one or more columns of cascaded switches, wherein a frequency having a given relative phase φ is applied as an input of the top switch in a cascade. A particular configuration of 2N−1 different reference-values, determined by a preselected N-Bit binary code, is applied to the respective 2N−1 switches so that (1) whenever the amplitude value of an applied analog signal reaches a value equal to the reference value applied to any switch, that switch will switch to reverse the phase at its output from the phase at its input, and (2) cause the switching of the phase at the output at each switch ordinally situated in a column below that switch. The respective output phases from a certain subset of N switches of the 2N−1 switches define the binary values of the preselected N-Bit binary code output from the A/D converter.

REFERENCES:
patent: 5471210 (1995-11-01), Wingender et al.
patent: 5528175 (1996-06-01), Sterzer
patent: 6008748 (1999-12-01), Sterzer
patent: 6230001 (2001-05-01), Wyse
patent: 6411801 (2002-06-01), Kim et al.
patent: 7062247 (2006-06-01), Kovacevic et al.

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