Multiple sensor thermal management for electronic devices
First Claim
1. A device comprising:
- a current source circuit having an output to separately provide a first current and a second current;
a first thermal detection device disposed at a first location of the device, the first thermal detection device coupleable to the output of the current source circuit;
a voltage detection circuit comprising an input coupleable to the first thermal detection device and an output to provide;
a first indicator of a first voltage representative of a voltage at the first thermal detection device in response to the second current; and
a second indicator of a second voltage representative of a voltage difference between the voltage at the first thermal detection device in response to the second current and a voltage at the first thermal detection device in response to the first current; and
a temperature detection circuit having an input coupled to the output of the voltage detection circuit and an output to provide a first over-temperature indicator based on the first indicator and the second indicator.
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Accused Products
Abstract
A device includes a current source circuit to separately provide a first current and a second current and a thermal detection device coupleable to the output of the current source circuit. The device further includes a voltage detection circuit to provide a first indicator of a first voltage representative of a voltage at the thermal detection device in response to the second current and a second indicator of a second voltage representative of a voltage difference between the voltage at the thermal detection device in response to the second current and a voltage at the voltage detection device in response to the first current. The device further includes a temperature detection circuit to provide an over-temperature indicator based on the first indicator and the second indicator, wherein an operation of a circuit component of the device can be adjusted based on the over-temperature indicator.
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Citations
20 Claims
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1. A device comprising:
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a current source circuit having an output to separately provide a first current and a second current; a first thermal detection device disposed at a first location of the device, the first thermal detection device coupleable to the output of the current source circuit; a voltage detection circuit comprising an input coupleable to the first thermal detection device and an output to provide; a first indicator of a first voltage representative of a voltage at the first thermal detection device in response to the second current; and a second indicator of a second voltage representative of a voltage difference between the voltage at the first thermal detection device in response to the second current and a voltage at the first thermal detection device in response to the first current; and a temperature detection circuit having an input coupled to the output of the voltage detection circuit and an output to provide a first over-temperature indicator based on the first indicator and the second indicator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device comprising:
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a first thermal detection device disposed at a first location of the device to receive a first current and a second current; a voltage detection circuit comprising an input coupleable to the first thermal detection device and an output to provide; a first indicator of a first voltage representative of a voltage at the first thermal detection device in response to the second current; and a second indicator of a second voltage representative of a voltage difference between the voltage at the first thermal detection device in response to the second current and a voltage at the first thermal detection device in response to the first current; and a temperature detection circuit having an input coupled to the output of the voltage detection circuit and an output to provide a first over-temperature indicator based on the first indicator and the second indicator. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A device comprising:
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a current source circuit having an output to separately provide a first current and a second current; a first thermal detection device disposed at a first location of the device, the first thermal detection device coupleable to the output of the current source circuit; a voltage detection circuit comprising an input coupleable to the first thermal detection device and an output to provide; a first indicator of a first voltage representative of a voltage at the first thermal detection device in response to the second current; and a second indicator of a second voltage representative of a voltage difference between the voltage at the first thermal detection device in response to the second current and a voltage at the first thermal detection device in response to the first current; a temperature detection circuit having an input coupled to the output of the voltage detection circuit and an output to provide a first over-temperature indicator based on the first indicator and the second indicator; and an attenuation circuit having an input to receive the voltage at the first thermal detection device in response to the second current and an output to provide the first voltage, wherein an attenuation factor of the attenuation circuit is programmable.
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Specification