Invention Grant
US09294116B2 Digital to analog converter discharge circuit and associated method for analog to digital converter circuits 有权
数模转换器放电电路及相关方法用于模数转换电路

Digital to analog converter discharge circuit and associated method for analog to digital converter circuits
Abstract:
A circuit includes an amplifier circuit that receives a residue voltage from an output capacitor connected to an output of a digital to analog converter (DAC). The DAC is employed in a pipeline stage of an analog to digital converter (ADC). The amplifier circuit provides a scaled output voltage based on the residue voltage. A sample circuit samples the scaled output voltage during a first portion of a hold phase of the DAC. A discharge circuit supplies the sampled scaled output voltage to the output of the DAC during a second portion of the hold phase of the DAC to mitigate settling time of the DAC.
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