TEMPERATURE COMPENSATION CIRCUIT
First Claim
1. A temperature compensation circuit comprising:
- a bias circuit configured to output a bias current having a current value increasing in proportion to an absolute temperature in a low-temperature region in which a temperature is lower than a predetermined temperature, and having a greater current value than the current value proportional to the absolute temperature in a high-temperature region in which the temperature is equal to or greater than the predetermined temperature; and
a transistor having a control terminal supplied with the bias current,the bias circuit comprising;
a first current generating circuit configured to generate a first current increasing in proportion to the absolute temperature;
a second current generating circuit configured to generate a second current that does not flow in the low-temperature region and flows in the high-temperature region; and
a control circuit configured to control the second current and having a connection terminal capable of being connected with an external resistor for adjusting a magnitude of the second current,the bias circuit being configured to generate a third current by adding the first current to the second current, and output the bias current that is the third current or a fourth current depending on the third current.
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Accused Products
Abstract
A temperature compensation circuit according to an embodiment of the present invention includes a bias circuit configured to output a bias current having a current value increasing in proportion to an absolute temperature in a low-temperature region in which a temperature is lower than a predetermined temperature, and having a greater current value than the current value proportional to the absolute temperature in a high-temperature region in which the temperature is equal to or greater than the predetermined temperature, and a transistor having a control terminal supplied with the bias current. The bias circuit includes a first current generating circuit configured to generate a first current increasing in proportion to the absolute temperature, a second current generating circuit configured to generate a second current that does not flow in the low-temperature region and flows in the high-temperature region, and a control circuit configured to control the second current and having a connection terminal capable of being connected with an external resistor for adjusting a magnitude of the second current, and is configured to generate a third current by adding the first current to the second current, and output the bias current depending on or equal to the third current.
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Citations
20 Claims
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1. A temperature compensation circuit comprising:
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a bias circuit configured to output a bias current having a current value increasing in proportion to an absolute temperature in a low-temperature region in which a temperature is lower than a predetermined temperature, and having a greater current value than the current value proportional to the absolute temperature in a high-temperature region in which the temperature is equal to or greater than the predetermined temperature; and a transistor having a control terminal supplied with the bias current, the bias circuit comprising; a first current generating circuit configured to generate a first current increasing in proportion to the absolute temperature; a second current generating circuit configured to generate a second current that does not flow in the low-temperature region and flows in the high-temperature region; and a control circuit configured to control the second current and having a connection terminal capable of being connected with an external resistor for adjusting a magnitude of the second current, the bias circuit being configured to generate a third current by adding the first current to the second current, and output the bias current that is the third current or a fourth current depending on the third current. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A temperature compensation circuit comprising:
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a bias circuit configured to output a bias current having a current value increasing in proportion to an absolute temperature in a low-temperature region in which a temperature is lower than a predetermined temperature, and having a greater current value than the current value proportional to the absolute temperature in a high-temperature region in which the temperature is equal to or greater than the predetermined temperature; and a transistor having a control terminal supplied with the bias current, the bias circuit comprising; a first transistor having a control terminal supplied with a first control current or voltage having a current value or a voltage value changing linearly with respect to the absolute temperature; a second transistor having a control terminal supplied with a second control current or voltage having a current value or a voltage value independent of the absolute temperature; a third transistor having a control terminal supplied with a third control current or voltage having a current value or a voltage value changing linearly with respect to the absolute temperature; a fourth transistor having a control terminal supplied with a fourth control current or voltage having a current value or a voltage value changing linearly with respect to the absolute temperature, and having a main terminal through which a first current flows, the first current increasing in proportion to the absolute temperature; a fifth transistor having a control terminal connected to the main terminal of the second transistor, a first main terminal connected to the main terminal of the third transistor, and a second main terminal; a sixth transistor having a control terminal connected to the main terminal of the first transistor, a first main terminal connected to the main terminal of the third transistor, and a second main terminal through which a second current flows, the second current not flowing in the high-temperature region and flowing in the low-temperature region; and a control circuit configured to supply the third control current or voltage to the third transistor, and having a connection terminal capable of being connected with an external resistor for adjusting a magnitude of the second current, the bias circuit being configured to generate a third current by adding the first current to the second current, and output the bias current that is the third current or a fourth current depending on the third current. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification