Temperature detector, temperature detecting method, and semiconductor device having the temperature detector
First Claim
1. A temperature detector comprising:
- a voltage generator generating a first voltage and a second voltage which are inversely proportional to temperature;
a selection circuit outputting one of the first and second voltages in response to a test signal; and
a comparator comparing a reference voltage with one of the first and second voltages output from the selection circuit, and generating a detection signal according to a comparison result.
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Accused Products
Abstract
A temperature detector, a temperature detecting method, and a semiconductor device having the temperature detector, in which the temperature detector includes a voltage generator, a selection circuit, and a comparator. The voltage generator generates first and second voltages that are inversely proportional to temperature. The selection circuit outputs the first voltage during a normal operation, and the second voltage during a self-test operation, wherein the second voltage is lower than the first voltage. The comparator compares a reference voltage with one of the first and second voltages output from the selection circuit, and generates a detection signal according to the comparison result. The temperature detecting method is performed by the temperature detector. The semiconductor device includes a reset signal generator that generates a reset signal for resetting a central processing unit (CPU) in response to a detection signal output from the temperature detector.
26 Citations
9 Claims
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1. A temperature detector comprising:
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a voltage generator generating a first voltage and a second voltage which are inversely proportional to temperature;
a selection circuit outputting one of the first and second voltages in response to a test signal; and
a comparator comparing a reference voltage with one of the first and second voltages output from the selection circuit, and generating a detection signal according to a comparison result. - View Dependent Claims (2, 3, 4)
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5. A semiconductor device comprising:
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a temperature detector detecting an applied temperature and generating a detection signal;
a reset signal generator generating a reset signal in response to the detection signal; and
a central processing unit that is reset in response to the reset signal, wherein the temperature detector comprises;
a voltage generator generating a first voltage and a second voltage which are inversely proportional to temperature;
a selection circuit outputting one of the first and second voltages in response to a test signal; and
a comparator comparing a reference voltage with one of the first and second voltages output from the selection circuit, and generating the detection signal according to the comparison result. - View Dependent Claims (6, 7)
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8. A method of detecting temperature, comprising:
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generating a first voltage and a second voltage which are inversely proportional to temperature;
outputting the first voltage in response to a first logic level of a test signal, and the second voltage in response to a second logic level of the test signal, wherein the second voltage is lower than the first voltage; and
comparing a reference voltage with one of the first and second voltages, and generating a signal corresponding to a comparison result as a temperature detection signal. - View Dependent Claims (9)
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Specification