Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Reexamination Certificate
2006-10-10
2006-10-10
Bennett, G. Bradley (Department: 2859)
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
C327S539000
Reexamination Certificate
active
07118273
ABSTRACT:
A thermal sensor providing simultaneous measurement of two diodes. A first diode and a second diode are coupled to a first current source and a second current source, respectively. The ratio of the currents provided by the two sources is accurately known. The voltage across each of the two diodes may be coupled to the input of a differential amplifier for determination of temperature. Alternatively, the first diode may be coupled to a first current source by a resistor with a known voltage drop, and the second diode may be coupled to an adjustable second current source. The current in the second diode may be adjusted until the voltage across the second diode is equal to the sum of voltage drop across the first diode and the known voltage drop across the resistor. Under the established conditions, the Diode Equation may be used to calculate a temperature.
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IBM Technical Disclosure Bulletin vol. 36, No. 08, Aubertine et al., “On Chip Temperature Sensor,” Aug. 1993, pp. 489-492.
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Bennett G. Bradley
Transmeta Corporation
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