Patent ID: 8427227

Claim:
A temperature compensation circuit comprising: a first transistor having a control terminal supplied with a first signal; a first resistor having a first end connected to an output of the first transistor; a second transistor having a control terminal supplied with a second signal; a second resistor having a first end connected to an output of the second transistor; a third resistor having a first end connected to a first connection point to which a second end of the first resistor and a second end of the second resistor are commonly connected; a constant voltage element connected to the third resistor; a third transistor having a control terminal connected to the first end of the first resistor; a fourth transistor having a control terminal connected to the first end of the second resistor; a fifth transistor having a control terminal supplied with the first signal; a first control circuit having a first input terminal connected to an output of the fifth transistor and supplied with a first current outputted from the fifth transistor, a second input terminal connected to a fourth resistor wherein a second current flows through the second input terminal, and an output terminal outputting a third current depending on a difference between a value of the first current and a value of the second current; a sixth transistor having a control terminal supplied with the third current; a seventh transistor having a control terminal which is connected to the control terminal of the sixth transistor, is supplied with the third current, and outputs a current depending on the third current to a second connection point to which the fourth and fifth transistors are commonly connected; an eighth transistor having a control terminal connected to the control terminal of the sixth transistor; a first mirror circuit connected to the eiqhth transistor; and a second mirror circuit connected to the first mirror circuit.