Invention Grant
US07834786B2 Sample hold circuit for use in time-interleaved A/D converter apparatus including paralleled low-speed pipeline A/D converters 有权
采样保持电路,用于并行低速流水线A / D转换器的时间交织A / D转换装置

Sample hold circuit for use in time-interleaved A/D converter apparatus including paralleled low-speed pipeline A/D converters
Abstract:
A sample hold circuit is provided for use in a time-interleaved A/D converter apparatus including a plurality of low-speed pipeline A/D converters which are parallelized. The sample hold circuit includes a sampling capacitor and a sample hold amplifier, and operates to sample and hold an input signal by using a switched capacitor. An adder circuit of the sample hold circuit adds a ramp calibration signal to the input signal, by inputting the ramp calibration signal generated to have a frequency identical to that of a sampling clock signal and a predetermined slope based on the sampling clock signal, into a sample hold amplifier via a calibration capacitor having a capacitance smaller than that of the sampling capacitor.
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