Patent ID: 9625500
Date: 2017-04-18
CPC Classifications: H03M

Claim:
1. An A/D converter comprising: an analog input terminal to input an analog input signal; an analog output terminal to output an analog output signal; a digital output terminal to output a digital output signal; a first resistance comprising one end connected to the analog input terminal or a reference voltage line and another end connected to a first node; a second resistance comprising one end connected to the first node and another end connected to the analog output terminal; an operational amplifier comprising a first input terminal connected to the first node, a second input terminal connected to the reference voltage line or the analog input terminal, and an output terminal connected to the analog output terminal; a quantizer comprising an input terminal connected to the analog input terminal and an output terminal connected to the digital output terminal; and a DA converter comprising an input terminal connected to the digital output terminal and an output terminal connected to the first node.