Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2007-01-23
2007-01-23
Barnie, Rexford (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S150000, C341S172000
Reexamination Certificate
active
11312882
ABSTRACT:
A method of sampling an input signal in a delta-sigma modulator having at least an integrator stage and a feedback digital-to-analog converter (DAC) stage includes sampling an input signal at a sampling rate by alternately utilizing the two sampling capacitors during two sampling cycles such that the two sampling capacitors are each being utilized at half the rate of the sampling rate. Samples from the two sampling capacitors are summed at the sampling rate at an intermediate node with a feedback samples provided by the feedback DAC stage at the sampling rate to generate output samples which are output from integrator stage at the sampling rate.
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Allen Daniel John
Lei Gong Tom
Melanson John Laurence
Nguyen Thuan Luong
Cirrus Logic Inc.
Murphy James J.
Nguyen Khai M.
Thompson & Knight LLP
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