US Patent 9595974 Reconfigurable wideband sub-ranging analog-to-digital converter

A reconfigurable wideband analog-to-digital converter (ADC) system comprising a first converter stage including a first sample and hold circuit for sampling an input signal, a first ADC configured to generate a digital representation of the sampled input signal from the first sample and hold circuit, and a first digital-to-analog converter (DAC) responsive to the output of the first ADC and configured to generate an analog representation of the digital representation of the sampled input signal. A control processor is provided and configured to generate a digital control signal. A current control circuit is responsive to the digital control signal for generating an analog current control signal for selectively altering a characteristic of at least one of the first ADC and the first DAC.