Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2006-09-22
2008-11-04
Nguyen, Khai M (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S155000, C341S172000
Reexamination Certificate
active
07446686
ABSTRACT:
A method of operating a delta-sigma data converter includes receiving an input signal at an input of a delta-sigma modulator having a loop filter including a plurality of integrator stages, a quantizer for generating a quantized output code from outputs of the integrator stages, and a feed-back loop coupling a feed-back signal from the output of the quantizer to the input of the delta-sigma modulator. The input signal is converted to quantized output codes during a conversion period including a plurality of integrator cycles in which at least one of the integrator stages is held in reset for at least one integration cycle at the start of the conversion period to maintain stability of the modulator over a wider range of levels of the input signal.
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Hodapp Stephen Timothy
Rueger Timothy
Cirrus Logic Inc.
Murphy James J.
Nguyen Khai M
Thompson & Knight LLP
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