Patent ID: 7603902
Filing Date: 2009-10-20
Classification: G01D,G01P

Abstract:
1. A temperature compensation circuit comprising: a first resistor means and a second resistor means connected in series between a high potential power supply voltage line and a low potential power supply voltage line; a third resistor means and a fourth resistor means connected in series between the high potential power supply voltage line and the low potential power supply voltage line; a fifth resistor means and a sixth resistor means connected in series between the high potential power supply voltage line and the low potential power supply voltage line; a seventh resistor means and an eighth resistor means connected in series between the high potential power supply voltage line and the low potential power supply voltage line; a ninth resistor means connecting a first connection node of the first resistor means and the second resistor means and a second connection node of the third resistor means and the fourth resistor means; a tenth resistor means connecting a third connection node of the fifth resistor means and the sixth resistor means and a fourth connection node of the seventh resistor means and the eighth resistor means; wherein the first and fourth resistor means have a first characteristic, which is a negative temperature coefficient that decreases the resistance as the temperature rises; the second and third resistor means have a second characteristic, which is a temperature coefficient that is greater than the temperature coefficient of the first characteristic; the fifth and eighth resistor means have a third characteristic, which is a positive temperature coefficient that varies symmetrically to the first characteristic; and the sixth and seventh resistor means have a fourth characteristic, which is a temperature coefficient that is smaller than the temperature coefficient of the third characteristic and varies symmetrically to the second characteristic; and an output terminal defined by a node connecting a first connection line, which connects the first connection node and the second connection node, and a second connection line, which connects the third connection node and the fourth connection node.