Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1991-03-12
1992-10-27
Hoff, Marc
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
341172, 341122, H03M 300
Patent
active
051593416
ABSTRACT:
A delta sigma modulator provides dual phase sampling of analog input and/or a reference voltage. This dual phase sampling may be realized using a switched capacitor circuit having dual legs with a capacitor on each such leg. The dual phase sampling of the reference voltage poses a complication that mandates the necessity of providing a compensation signal. The delta sigma modulator is provided with appropriate circuitry to provide a compensation signal that compensates for the reduced signal level due to the dual sampling. In particular, the delta sigma modulator compensates for the reduced level of the output from an integrating amplifier circuit due to the timing necessary to implement the dual sampling approach.
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McCartney Damien
Welland David R.
Analog Devices Inc.
Hoff Marc
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