US Patent No: 7,915,947
Number of patents in Portfolio can not be more than 2000
PTAT sensor and temperature sensing method thereof
Stats
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Mar 29, 2011
Issued date -
Dec 4, 2009
filing date -
12/631,138
serial no -
In Force
status
Importance
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Abstract
A proportional to absolute temperature (PTAT) sensor is capable of reducing a sensing error resulted from a mismatch between circuit components. The PTAT sensor includes a control unit, a sensing unit and a calculation unit. The control unit generates a control signal. The sensing unit, comprising at least a pair of circuit components having a matching relationship, senses an absolute temperature under the first connection configuration and the second connection configuration respectively to generate a first voltage value and a second voltage value, wherein the first connection configuration and the second connection configuration are decided by interchanging the circuit connections of the pair of circuit components according to the control signal. And the calculation unit, coupled to the sensing unit, calculates a PTAT voltage value according to the first voltage value and the second voltage values.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 6,991,369 Method and circuit for the provision of accurately scaled currents | 4 | 2003 | |
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| 2010/0013,544 Temperature-Dependent Signal Provision | 2 | 2006 | |
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| 5,614,816 Low voltage reference circuit and method of operation | 14 | 1995 | |
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| 7,356,426 Calibration of thermal sensors for semiconductor dies | 3 | 2004 | |
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| 7,880,459 Circuits and methods to produce a VPTAT and/or a bandgap voltage | 6 | 2008 | |
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| 4,267,468 Temperature sensing circuit | 7 | 1979 | |
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| 7,281,846 Integrated resistance cancellation in temperature measurement systems | 38 | 2004 | |
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| 6,997,606 Threshold temperature sensor comprising room temperature test means | 3 | 2002 | |
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