AD CONVERTER AND RECEIVING APPARATUS

摘要

It is intended to provide an AD converter capable of increasing its conversion accuracy. An AD converter is equipped with a clock generator which generates a first clock using a second clock and a comparator which includes a comparison circuit for comparing an input signal with a prescribed value in a first period of the first clock and a precharging circuit for precharging, in a second period of the first clock, an internal voltage to a prescribed value for the next comparison operation. The clock generator includes a replica circuit of the precharging circuit of the comparator. In the replica circuit of the precharging circuit, a precharging period from the start to the end of precharging is set as the second period of the first clock.

主权项

1. An AD converter comprising:
a clock generator that generates a first clock using a second clock; and a comparator comprising:
a comparison circuit that compares an input signal with a prescribed value in a first period of the first clock; anda precharging circuit that precharges, in a second period of the first clock, an internal voltage to a prescribed value for a next comparison operation, wherein the clock generator comprises a replica circuit of the precharging circuit of the comparator, and in the replica circuit of the precharging circuit a precharging period from the start to the end of precharging is set as the second period of the first clock.