Method and apparatus for operating correlator of an ADC circuit
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United States of America Patent
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N/A
Issued Date -
Feb 2, 2006
app pub date -
Jul 28, 2005
filing date -
Jul 29, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An analog-to-digital converter (ADC) circuit that converts an analog input signal into a digital output circuit includes a reduced block length correlator circuit and a digital subtractor circuit, where the digital subtractor circuit subtracts digital output of a calibrated stage of the ADC circuit from an overall output of the ADC circuit, and feeds the result of the subtraction to correlator circuit, reducing the magnitude of an input signal seen by the correlator and thereby increasing the signal to noise ratio (SNR) and the accuracy of the correlator. The ADC circuit also provides significant reduction of block length, die area and power dissipation related to the correlator.
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