Patent ID: 8674861
Filing Date: 2014-03-18
Classification: H03M

Abstract:
1. An analog-to-digital converter, comprising: a sampling unit configured to sample differential input signal to output a differential sampled signal, the differential sampled signal having a first sampled signal and a second sampled signal; a reference signal generator configured to generate a first reference signal and a second reference signal; a preamplifier configured to amplify the differential sampled signal to output a differential amplification signal having a first amplified output and a second amplified output, a comparator configured to compare the first amplified output and the second amplified output with each other; and a correction controller configured to control operations of the first differential amplifier and the second differential amplifier based on a comparison result of the comparator, and control common-mode voltage levels of the first reference signal and the second reference signal or common-mode voltage levels of the first sampled signal and the second sampled signal in accordance with the operations of the first differential amplifier and the second differential amplifier.