AMPLIFIER USING MULTI INPUT DIFFERENTIAL PAIR, AND COMPARATOR AND ANALOG-TO-DIGITAL CONVERTING APPARATUS USING THE SAME

摘要

An amplifier includes a common load suitable for outputting an output signal, a coarse input differential stage, coupled to the common load, suitable for amplifying a difference between an input signal and a coarse ramping signal to output a coarse conversion signal as a first output signal, when the coarse ramping signal is lower than the input signal, and a fine input differential stage, coupled to the common load, suitable for amplifying a difference between a fine ramping signal and a bias signal and compensating the first output signal to output a fine conversion signal as the output signal, when a zero crossing occurs by the compensated first output signal.

主权项

1. An amplifier comprising:
a common load suitable for outputting an output signal; a coarse input differential stage, coupled to the common load, suitable for amplifying a difference between an input signal and a coarse ramping signal to output a coarse conversion signal as a first output signal, when the coarse ramping signal is lower than the input signal; and a fine input differential stage, coupled to the common load, suitable for amplifying a difference between a fine ramping signal and a bias signal and compensating the first output signal to output a fine conversion signal as the output signal, when a zero crossing occurs by the compensated first output signal.