公开(公告)号：US20190242759A1

公开(公告)日：2019-08-08

申请号：US16387649

申请日：2019-04-18

Applicant: DENSO CORPORATION

Inventor： Shogo HIKOSAKA

IPC: G01K7/25 ,  G01K7/14 ,  H03M1/18 ,  H03G1/00

CPC classification number: G01K7/25 ,  G01K7/14 ,  H03G1/0041 ,  H03M1/18

Abstract: A thermistor drive circuit includes a plurality of driving resistors, at least one current correction resistor, a voltage measurement unit and a controller. The driving resistors are selectively connected to a thermistor for correcting a temperature characteristic of the thermistor whose resistance value changes in accordance with a temperature to be detected. The current correction resistor is selectively connected between a power supply and a ground. The voltage measurement unit measures a terminal voltage of the thermistor. The controller switches connection states of the driving resistors according to the terminal voltage. When switching the connection states of the driving resistors, the controller also switches a connection state of the current correction resistor to suppress a fluctuation of a power supply current before and after the switching of the connection states of the driving resistors.

公开(公告)号：US20150153422A1

公开(公告)日：2015-06-04

申请号：US14553018

申请日：2014-11-25

Applicant: DENSO CORPORATION

Inventor： Kazutaka HONDA ,  Tetsuya MAKIHARA ,  Shogo HIKOSAKA

IPC: G01R31/36

CPC classification number: G01R31/3658 ,  G01R19/16542

Abstract: A first part circuit and an operational amplifier form a level shift circuit, which selects either one of battery cells forming an assembled battery and extracts and holds a voltage representing an inter-terminal voltage of a selected battery cell. A second part circuit and the operational amplifier form a residual voltage generation circuit, which generates a residual voltage by amplifying a differential voltage between a conversion subject voltage and an analog voltage corresponding to a conversion result of an A/D conversion circuit and applies the residual voltage to the A/D conversion circuit as a conversion subject voltage. A switchover circuit operates the operational amplifier as either one of the level shift circuit and the residual voltage generation circuit and switches over a connection-state to apply a voltage held by the level shift circuit to the A/D conversion circuit and the residual voltage generation circuit as a conversion subject voltage.

Abstract translation: 第一部分电路和运算放大器形成电平移位电路，其选择形成组电池的电池单元中的任一个，并提取并保持表示所选择的电池单元的端子间电压的电压。 第二部分电路和运算放大器形成残余电压产生电路，其通过放大与转换对象电压和对应于A / D转换电路的转换结果的模拟电压之间的差分电压来产生残留电压，并且将剩余电压 作为转换对象电压的A / D转换电路的电压。 切换电路将运算放大器作为电平移位电路和剩余电压产生电路中的任一个进行操作，并切换连接状态，将由电平移位电路保持的电压施加到A / D转换电路和剩余电压产生 电路作为转换主体电压。

公开(公告)号：US20190128747A1

公开(公告)日：2019-05-02

申请号：US16231745

申请日：2018-12-24

Applicant: DENSO CORPORATION

Inventor： Shogo HIKOSAKA

IPC: G01K7/20 ,  G01L9/04 ,  G01L9/06 ,  G01R27/14 ,  G01L19/04

Abstract: A sensor apparatus includes: a sensor that includes a resistor bridge circuit; a temperature detection circuit that provides a first path and a second path; a voltage measurement portion that measures a voltage of each of the differential output terminals; a controller that causes the voltage measurement portion to measure the voltage of each of the two differential output terminals; and a calculator that calculates a difference between the voltages of the two differential output terminals to acquire temperature information of the sensor.