Invention Grant
- Patent Title: Current detection circuit and semiconductor device including the same
-
Application No.: US15401596Application Date: 2017-01-09
-
Publication No.: US10302681B2Publication Date: 2019-05-28
- Inventor: Masanori Otsuka , Wataru Saito , Yoshitaka Jingu , Yasuhiko Kokami , Satoshi Kondo , Junya Horishima
- Applicant: Renesas Electronics Corporation
- Applicant Address: JP Tokyo
- Assignee: RENESAS ELECTRONICS CORPORATION
- Current Assignee: RENESAS ELECTRONICS CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: McDermott Will & Emery LLP
- Priority: JP2016-010661 20160122
- Main IPC: G01R19/32
- IPC: G01R19/32 ; H03K17/687 ; F16D48/06 ; F16D121/18

Abstract:
According to one embodiment, a current detection circuit (12) includes: a detection resistor (Rs) provided between a solenoid valve (106) and a solenoid driver (11); an amplification unit (121) configured to amplify a detected voltage of the detection resistor (Rs); an AD converter (122) that is driven by a reference voltage (Vref) generated based on a reference current (Iref) and configured to convert an output voltage from the amplification unit (121) into a digital value and output the digital value as a detected current value (D1); and a correction unit configured to perform a correction on the detected current value (D1). The correction unit includes: a temperature sensor (123); a storage unit (125) configured to store information about temperature characteristics of the detected current value (D1) generated due to temperature characteristics of a reference current in each of two or more different temperature regions; and an operation unit configured to apply, to the detected current value (D1), a first correction coefficient calculated based on a detection result of the temperature sensor (123) and information about temperature characteristics of the detected current value (D1) stored in the storage unit (125).
Public/Granted literature
- US20170212154A1 CURRENT DETECTION CIRCUIT AND SEMICONDUCTOR DEVICE INCLUDING THE SAME Public/Granted day:2017-07-27
Information query