Title:
CURRENT DETECTOR
Document Type and Number:
Japanese Patent JP3454708
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a current detector in which a highly accurate current detection can be obtained through a simple arrangement even if a temperature fluctuation occurs in a differential amplifier circuit by removing the detection error resulting from a temperature fluctuation in the differential amplifier circuit.
SOLUTION: Upon receiving a difference voltage value VDF indicative of the voltage difference across a shunt resistor 7 from-an A/D conversion circuit 15, an ECU 17 corrects a detection error resulting from the temperature fluctuation of a differential amplifier circuit ASIC 13 contained in the inputted difference voltage value VDF using correcting information concerning to the combination of a plurality of reference voltage values VREF, VOFF, stored in a reference voltage memory section 23 while being updated among correcting information associated with a plurality of combination variables of reference voltage value.
Inventors:
Yoshikazu Nagashima
Yukihiko Umeda
Yukihiko Umeda
Application Number:
JP9356998A
Publication Date:
October 06, 2003
Filing Date:
April 06, 1998
Export Citation:
Assignee:
Yazaki Corporation
TOYOTA JIDOSHA KABUSHIKI KAISHA
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
G01R19/00; H03F1/30; (IPC1-7): G01R19/00; H03F1/30
Domestic Patent References:
| JP496618A | ||||
| JP5203459A |
Attorney, Agent or Firm:
Hidekazu Miyoshi