HIGH-ACCURACY CMOS TEMPERATURE SENSOR AND OPERATING METHOD
First Claim
1. A CMOS temperature sensor, comprising:
- a bandgap reference circuit providing a bandgap reference voltage regardless of temperature using a first voltage inversely proportional to temperature and a second voltage proportional to temperature, and further providing a first current proportional to temperature using the second voltage;
a reference voltage generator copying the first current and providing a reference voltage generated using the first voltage and the copied first current; and
a temperature information voltage generator copying the first current and providing a temperature information voltage proportional to temperature.
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Accused Products
Abstract
A CMOS temperature sensor is provided. The CMOS temperature sensor, comprises: a bandgap reference circuit outputting a constant bandgap reference voltage regardless of temperature using a first voltage inversely proportional to temperature and a second voltage proportional to temperature and generating a first current proportional to temperature using the second voltage; a reference voltage generator copying the first current and outputting a reference voltage generated using the first voltage and the copied first current; and a temperature information voltage generator copying the first current and outputting a temperature information voltage proportional to temperature.
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Citations
20 Claims
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1. A CMOS temperature sensor, comprising:
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a bandgap reference circuit providing a bandgap reference voltage regardless of temperature using a first voltage inversely proportional to temperature and a second voltage proportional to temperature, and further providing a first current proportional to temperature using the second voltage; a reference voltage generator copying the first current and providing a reference voltage generated using the first voltage and the copied first current; and a temperature information voltage generator copying the first current and providing a temperature information voltage proportional to temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A CMOS temperature sensor, comprising:
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a bandgap reference circuit providing a bandgap reference voltage regardless of temperature in relation to a first voltage inversely proportional to temperature and a second voltage proportional to temperature; a reference voltage generator providing a reference voltage generated by correcting the first voltage into the second voltage; and a temperature information voltage generator generating a temperature information voltage proportional to temperature on the basis of the second voltage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A CMOS temperature sensor, comprising:
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a bandgap reference circuit including a first BJT and a second BJT whose base terminals are connected to each other, the bandgap reference circuit generating a temperature-proportional current using a first voltage, which is a base-emitter voltage of the first BJT, and a second voltage based on a difference between the first voltage and a base-emitter voltage of the second BJT; a reference voltage generator generating a reference voltage on the basis of the temperature-proportional current and the first voltage; and a temperature information voltage generator generating a temperature information voltage on the basis of the temperature-proportional current, and including a current source controlling an level of the temperature information voltage on the basis of the reference voltage. - View Dependent Claims (20)
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Specification