Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Reexamination Certificate
2006-02-28
2006-02-28
Nguyen, John B (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
C341S156000, C341S144000
Reexamination Certificate
active
07006028
ABSTRACT:
Devices for performing analog-to-digital conversion with reduced noise. In one implementation, an analog-to-digital converter includes at least one internal digital-to-analog converter (DAC) that comprises a plurality of analog components and converts an intermediate digital signal into an associated intermediate analog signal, a dynamic element matching (DEM) circuit coupled to the DAC to permute configurations of the analog components within the DAC, a noise cancellation circuit and a digital subtractor block. The noise cancellation circuit is coupled to receive a first digital sequence comprising a component of a digitized representation of an analog output of the DAC, and a second digital sequence representing a state of the DEM circuitry. The noise cancellation circuit is operable to combine the first and the second digital sequences so as to estimate a digital representation of a DAC noise caused by error sequence introduced mismatches among the analog components within the DAC. The digital subtractor block is coupled to the noise cancellation circuit and operable to use the estimated digital representation of the DAC noise to reduce the DAC noise.
REFERENCES:
patent: 5248973 (1993-09-01), Babu et al.
patent: 5406283 (1995-04-01), Leung
patent: 5436629 (1995-07-01), Mangelsdorf
patent: 5892472 (1999-04-01), Shu et al.
patent: 5949361 (1999-09-01), Fischer et al.
patent: 6137431 (2000-10-01), Lee et al.
patent: 6211805 (2001-04-01), Yu
patent: 6266002 (2001-07-01), Gong et al.
patent: 6456223 (2002-09-01), Yu et al.
patent: 6515611 (2003-02-01), Fetterman et al.
Nguyen John B
The Regents of the University of California
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