Coded data generation or conversion – Converter calibration or testing
Reexamination Certificate
2007-01-05
2008-12-16
Williams, Howard (Department: 2819)
Coded data generation or conversion
Converter calibration or testing
C341S155000
Reexamination Certificate
active
07466250
ABSTRACT:
The invention relates to an equalised time interleaved analogue digital conversion device. The analogue digital conversion device comprises a number N of analogue digital converters distributed in N channels. Each analogue digital converter has a sampling frequency N times lower than the required sampling frequency. The digital signal is built up from samples output from each channel. The device comprises a reference channel comprising an analogue digital converter generating samples of the analogue signal. Each filter comprises an equaliser filter. The filter received a digital signal output by the analogue digital converter of the channel on which it is placed. The filter also receives an error signal and outputs a filtered digital signal s(n) corrected for errors deduced from the error signal. The error signal corresponds to the difference at a given time between firstly the digital signal corrected by the filter and secondly by the digital signal output by the analogue digital converter of the reference channel. In particular, the invention is applicable to analogue digital converters operating at a high clock frequency, typically of the order of one gigahertz.
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patent: 7245638 (2007-07-01), Agazzi et al.
patent: 2007/0069937 (2007-03-01), Balakrishnan et al.
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Machine translation of JP 2004328436 A dated Nov. 2004.
Abstract of JP 2004 328436 Nov. 18, 2004 Anritsy Corp.
Dyer K et al: “Analog background calibration of a 10 b 40 Msample/s paralle pipelined ADS” Solid-State Circuits conference, 1998 Digest of Technical Papers 1998 International San Francisco, CA Feb. 5, 1998.
Hummels D M et al: Distortion compensation for time interleaved analog to digital converters >> Jun. 4, 1996, Instrumentation and Measurement technology Conference 1996. Jun. 6, 1996 New York.
Lowe Hauptman & Ham & Berner, LLP
Thales
Williams Howard
LandOfFree
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