公开(公告)号：US20220190840A1

公开(公告)日：2022-06-16

申请号：US17406193

申请日：2021-08-19

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kyoungjun MOON ,  Dongryeol OH ,  Younghyo PARK ,  Youngjae CHO ,  Michael CHOI

IPC: H03M1/46 ,  H03M1/12 ,  H03M1/06

Abstract: An analog-to-digital converter (ADC) includes a coarse ADC that receives an analog input voltage, generates a first digital signal based on the analog input voltage using a successive approximation register (SAR) method, and outputs a residual voltage remaining after the first digital signal is generated. The ADC further includes an amplifier that receives the residual voltage and a test voltage, generates a residual current by amplifying the residual voltage by a predetermined gain, and generates a test current by amplifying the test voltage by the gain. The ADC further includes a fine ADC that receives the residual current and generates a second digital signal based on the residual current using the SAR method, and an auxiliary path that receives the test current and generates a gain correction signal based on the test current. The gain of the amplifier is adjusted based on the gain correction signal.