Temperature sensor
First Claim
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1. A temperature sensor, comprising:
- a first current generating circuit configured to generate a first current, the first current having a substantially constant magnitude regardless of temperature changes, wherein the first current generating circuit includes a first amplifier which generates the first current according to a bandgap reference voltage and a feedback voltage, wherein the bandgap voltage is not affected by the first current;
a cascode circuit configured to generate a cascode voltage;
a second current generating circuit configured to generate a second current, the second current having a magnitude that varies in inverse proportion to a temperature; and
a compensated voltage output circuit configured to output, using the first current and the second current, a compensated voltage having one or more predetermined temperature coefficients, wherein the compensated voltage has a value according to a temperature.
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Abstract
A temperature sensor includes a first current generating circuit configured to generate a first current being constant regardless of temperature changes, a cascode circuit configured to generate a cascode voltage, a second current generating circuit configured to generate a second current being in inverse proportion to temperature, and a compensated voltage output circuit configured to output a compensated voltage having various temperature coefficients in response to the first current and the second current.
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Citations
20 Claims
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1. A temperature sensor, comprising:
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a first current generating circuit configured to generate a first current, the first current having a substantially constant magnitude regardless of temperature changes, wherein the first current generating circuit includes a first amplifier which generates the first current according to a bandgap reference voltage and a feedback voltage, wherein the bandgap voltage is not affected by the first current; a cascode circuit configured to generate a cascode voltage; a second current generating circuit configured to generate a second current, the second current having a magnitude that varies in inverse proportion to a temperature; and a compensated voltage output circuit configured to output, using the first current and the second current, a compensated voltage having one or more predetermined temperature coefficients, wherein the compensated voltage has a value according to a temperature. - View Dependent Claims (2, 3, 4, 5)
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6. A temperature sensor, comprising:
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a first current generating circuit configured to generate a first current according to a bandgap reference voltage, wherein the first current has a constant magnitude regardless of temperature changes, wherein the bandgap voltage is not affected by the first current; a cascode circuit configured to generate a cascode voltage according to the first current; a second current generating circuit configured to generate a second current using the cascode voltage, wherein the second current has a magnitude that varies in inverse proportion to temperature; and a compensated voltage output circuit suitable for outputting a compensated voltage having one or more predetermined temperature coefficients according to the first current and the second current, wherein the compensated voltage has a value according to a temperature. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification