Successive approximation analog-to-digital converter with...

Details Successive approximation analog-to-digital converter with... Successive approximation analog-to-digital converter with...

2007-04-24

2007-04-24

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000, C341S144000

Reexamination Certificate

active

11105015

ABSTRACT:
A successive approximation Analog-to-Digital Converter (“ADC”) having a successive approximation controller operably coupled to convert a control signal into a digital output of the successive approximation ADC, a current-steered Digital-to-Analog Converter operably coupled to convert the digital output of the successive approximation ADC into an analog feedback signal, and a comparator module operably coupled to compare the analog feedback signal with an analog input of the successive approximation ADC to produce the control signal. A further aspect is a method for increasing accuracy for a digital successive approximation of an analog input signal. The method includes determining a signal characteristic of the analog input signal to an Analog-to-Digital Converter (“ADC”), and selecting a reference voltage source of a Digital-to-Analog Converter of the ADC from a plurality of reference voltage sources based on the analog input signal.

REFERENCES:
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patent: 5638075 (1997-06-01), Nakajima
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