Temperature compensation circuit and sensor device

Patent metadata

Field	Value
Publication number	US-10088532-B2
Application number	US-201615165445-A
Country	US
Kind code	B2
Filing date	May 26, 2016
Priority date	Jun 2, 2015
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

Provided is a temperature compensation circuit capable of solely and independently adjusting a temperature compensation amount. The temperature compensation circuit includes: a first temperature compensation voltage terminal connected to a node between a first resistor and a second resistor; a second temperature compensation voltage terminal connected to a node between a third resistor and a fourth resistor; a first voltage terminal formed at a node between the first resistor and the fourth resistor; a second voltage terminal formed at a node between the second resistor and the third resistor; a fifth resistor connected between a power supply terminal and the first voltage terminal; and a sixth resistor connected between a ground terminal and the second voltage terminal.

First claim

What is claimed is:

1. A temperature compensation circuit, comprising:
at least six resistors of a first resistor to a sixth resistor;
a first output terminal connected to a node between the first resistor and the second resistor;
a second output terminal connected to a node between the third resistor and the fourth resistor;
a first voltage terminal formed at a node between the first resistor and the fourth resistor; and
a second voltage terminal formed at a node between the second resistor and the third resistor,
the fifth resistor connected between a power supply terminal and the first voltage terminal,
the sixth resistor connected between a ground terminal and the second voltage terminal,
wherein a resistance value of at least one of the first resistor to the fourth resistor has a temperature coefficient that is different from a temperature coefficient of a resistance value of a remainder of the first resistor to the fourth resistor, and
wherein the fifth and sixth resistors are configured to adjust a temperature compensation voltage output from the first and second output terminals, respectively, and the resistance value of the at least one of the first resistor to the fourth resistor is adjusted so that the temperature compensation voltage that is output from the first output terminal and the temperature compensation voltage that is output from the second output terminal are equal to each other at a predetermined temperature.

2. A temperature compensation circuit according to claim 1 , further comprising a seventh resistor connected between the first voltage terminal and the second voltage terminal.

3. A temperature compensation circuit according to claim 1 , further comprising a seventh resistor connected between the first output terminal and the second output terminal.

4. A temperature compensation circuit according to claim 1 , further comprising one of:
an additional resistor connected between the first voltage terminal and the second voltage terminal; or
an additional resistor connected between the first output terminal and the second output terminal.

5. A sensor device configured to produce an output responsively to intensity of a physical quantity applied to a sensor element, the sensor device comprising the temperature compensation circuit of claims 1 , the temperature compensation circuit being configured to compensate for a temperature coefficient of the sensor element.

6. A temperature compensation circuit, comprising:
at least six resistors of a first resistor to a sixth resistor;
a first output terminal connected to a node between the first resistor and the second resistor;
a second output terminal connected to a node between the third resistor and the fourth resistor;
a first voltage terminal formed at a node between the first resistor and the fourth resistor; and
a second voltage terminal formed at a node between the second resistor and the third resistor,
the fifth resistor connected between a power supply terminal and the first voltage terminal and configured to adjust a temperature compensation voltage output from the first terminal,
the sixth resistor connected between a ground terminal and the second voltage terminal and configured to adjust a temperature compensation voltage output from the second terminal,
wherein a resistance value of at least one of the first resistor to the fourth resistor has a temperature coefficient that is different from a temperature coefficient of a resistance value of a remainder of the first resistor to the fourth resistor, and
wherein a product of a resistance value of the first resistor and a resistance value of the third resistor and a product of a resistance value of the second resistor and a resistance value of the fourth resistor are equal to each other at a predetermined temperature.

7. A temperature compensation circuit according to claim 6 , further comprising a seventh resistor connected between the first voltage terminal and the second voltage terminal.

8. A temperature compensation circuit according to claim 6 , further comprising a seventh resistor connected between the first output terminal and the second output terminal.

9. A temperature compensation circuit according to claim 6 , further comprising one of:
an additional resistor connected between the first voltage terminal and the second voltage terminal; or
an additional resistor connected between the first output terminal and the second output terminal.

10. A sensor device configured to produce an output responsively to intensity of a physical quantity applied to a sensor element, the sensor device comprising the temperature compensation circuit of claim 6 , the temperature compensation circuit being configured to compensate for a temperature coefficient of the sensor element.

Assignees

• Sii Semiconductor Corp
• Ablic Inc

Inventors

• Ariyama Minoru

Classifications

• G01R33/0082 Primary

  Compensation, e.g. compensating for temperature changes · CPC title

• H03K17/14

  Modifications for compensating variations of physical values, e.g. of temperature · CPC title

• G01R33/07

  Hall effect devices · CPC title

• G01D3/028 Primary

  mitigating undesired influences, e.g. temperature, pressure · CPC title

• G05F1/567 Primary

  for temperature compensation · CPC title