Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2008-03-04
2010-02-16
Jeanglaude, Jean B (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S144000, C341S155000
Reexamination Certificate
active
07663522
ABSTRACT:
A delta-sigma A/D converter includes a D/A converter realized with a mixed-mode comb filter connected in a feedback loop from the output of the A/D converter to the input of the A/D converter. The D/A converter is configured to predistort a feedback signal. The converter further includes an analogue filter at the input of the A/D converter. The analogue filter is configured to cancel the predistortion of the feedback signal.
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Van Veldhoven, R., “A Triple-Mode Continuous-Time Sigma-Delta Modulator with Switched-Capacitor Feedback DAC for a GSM-Edge/CDMA2000/UMTS Receiver”, vol. 38 No. 12, pp. 2069-2076, Dec. 2003.
International Search Report PCT/FI2008/050234 filed Apr. 29, 2008.
Jeanglaude Jean B
Nokia Corporation
Squire Sanders & Dempsey L.L.P.
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