公开(公告)号：US12160245B2

公开(公告)日：2024-12-03

申请号：US17188247

申请日：2021-03-01

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Masaaki Usui

IPC: H03M1/12 ,  G06F11/07 ,  H03M1/10

Abstract: An AD converter includes a plurality of analog input terminals, a reference signal generation circuit that generates an analog reference signal, a sample-and-hold unit that includes a plurality of sample-and-hold circuits sampling the analog reference signal or one of analog input signals from the analog input terminals, a control unit that controls the sample-and-hold unit, and a conversion unit that converts an output signal from the sample-and-hold unit into a digital signal. The control unit controls the sample-and-hold unit to perform the output operation for analog input signal and the sampling operation for the analog reference signal.

公开(公告)号：US09793911B2

公开(公告)日：2017-10-17

申请号：US15265048

申请日：2016-09-14

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Masaaki Usui ,  Shunsuke Nakano

IPC: H03M1/00 ,  H03M1/12

CPC classification number: H03M1/1245

Abstract: An object of the present invention is to shorten time required for detecting disconnection in an input terminal of an A/D conversion circuit. A semiconductor device includes a first input channel that couples a first input terminal and an A/D conversion unit to each other, a second input channel that couples a second input terminal and the A/D conversion unit to each other, and a control circuit unit that separates the second input channel from the second input terminal and the A/D conversion unit to charge or discharge the second input channel when a signal input into the first input terminal is sampled by the A/D conversion unit.

公开(公告)号：US10003351B2

公开(公告)日：2018-06-19

申请号：US15708106

申请日：2017-09-18

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Masaaki Usui ,  Shunsuke Nakano

IPC: H03M1/00 ,  H03M1/12

CPC classification number: H03M1/1245

Abstract: An object of the present invention is to shorten time required for detecting disconnection in an input terminal of an A/D conversion circuit. A semiconductor device includes a first input channel that couples a first input terminal and an A/D conversion unit to each other, a second input channel that couples a second input terminal and the A/D conversion unit to each other, and a control circuit unit that separates the second input channel from the second input terminal and the A/D conversion unit to charge or discharge the second input channel when a signal input into the first input terminal is sampled by the A/D conversion unit.