Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2008-12-01
2010-11-02
Williams, Howard (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S076000
Reexamination Certificate
active
07825842
ABSTRACT:
A digital sigma-delta modulator (100) for modulating a digital input signal (x) is described. The digital sigma-delta modulator (100) comprises a quantizer (115) for quantizing an input signal (s) and producing a quantized output signal (y) at a first output (110) and an error output signal (−q) at a second output (165), at least one feedback loop (120, 125) connected to an input adder (140) and the first outputs (110) and the second output (165) of the quantizer (115) and a feedback filter (130, 135) in the at least one feedback loop (120, 125). The input adder (140) produces the sum signal (s) by adding the digital input signal (x) at an input (105) and output signals of the at least one feedback loop filters (130,135).
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Wong et al: “FIR Filters With Sigma-Delta Modulation Encoding” retrieved from the internet on the Aug. 31, 2006 via: http://ieeexplore.ieee.org/iell/29/2024/00056058.pdf?arnumber=56058#search=%22systolic%20filter%20modulation%20sigma&20delat%22. see esp. p. 980 top of second column.
Korte Werner
Korte-Gericke, legal representative Ingeborg Sigrid Ilse-Dore
Rheinfelder Clemens
Dann Dorfman Herrell & Skillman
Eland Stephen H.
Ubidyne, Inc.
Williams Howard
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