Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2005-09-13
2005-09-13
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S200000
Reexamination Certificate
active
06943716
ABSTRACT:
A sigma delta circuit is provided having a sigma delta modulator configured to operate according to a first clock signal and a quantizer connected to the sigma delta modulator, where the quantizer is configured to operate according to a second clock signal. In operation, if a small amplitude signal is received by the sigma delta circuit, the circuit is configured to operate at a fixed output frequency. When a large amplitude signal is received, the circuit is configured to adjust to a different frequency to accommodate the larger signal. The second clock signal may be a variable clock signal, where the quantizer operates according to a variable clock signal in order to adjust to different input signals.
REFERENCES:
patent: 5303346 (1994-04-01), Fesseler et al.
patent: 5347310 (1994-09-01), Yamada et al.
patent: 5963160 (1999-10-01), Wilson et al.
patent: 6661362 (2003-12-01), Brooks
patent: 6664908 (2003-12-01), Sundquist et al.
Ess Technology Inc.
Jean-Pierre Peguy
Stevens Law Group P.C.
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