High accuracy temperature sensor
First Claim
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1. A method comprising:
- sampling a temperature sensor to generate first, second and third samples; and
generating a signal proportional to temperature from the first, second and third samples, where the signal is defined as a difference between a first difference and a second difference, the first difference comprising a difference between the second sample and the first sample, the second difference comprising a difference between the third sample and the first sample, and where the signal is defined to cancel parasitic components in the first, second and third samples.
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Abstract
Temperature accuracy is improved, conversion gain is increased without increasing current density and parasitic resistance errors and other problems with conventional bandgap reference temperature sensors are eliminated by generating a signal proportional to temperature from three samples, where the signal is defined as a difference between a first difference and a second difference, the first difference comprising a difference between a second sample and a first sample, the second difference comprising a difference between a third sample and the first sample, and where the signal is defined to cancel parasitic components in the first, second and third samples.
23 Citations
20 Claims
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1. A method comprising:
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sampling a temperature sensor to generate first, second and third samples; and generating a signal proportional to temperature from the first, second and third samples, where the signal is defined as a difference between a first difference and a second difference, the first difference comprising a difference between the second sample and the first sample, the second difference comprising a difference between the third sample and the first sample, and where the signal is defined to cancel parasitic components in the first, second and third samples. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A device comprising:
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a sampler that samples a temperature sensor to generate a set of samples comprising first, second and third samples; a signal generator that generates a signal proportional to temperature from the first, second and third samples, where the signal is defined as a difference between a first difference and a second difference, the first difference comprising a difference between the second sample and the first sample, the second difference comprising a difference between the third sample and the first sample, and is defined to cancel parasitic components in the first, second and third samples. - View Dependent Claims (15, 16, 17, 18)
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19. A device comprising:
a signal generator that generates a signal proportional to temperature from first, second and third samples of a temperature sensor, where the signal is defined as a difference between a first difference and a second difference, the first difference comprising a difference between the second sample and the first sample, the second difference comprising a difference between the third sample and the first sample, and where the signal is defined to cancel parasitic components in the first, second and third samples. - View Dependent Claims (20)
Specification