Apparatus and methods for temperature calibration and sensing

Details Apparatus and methods for temperature calibration and sensing Apparatus and methods for temperature calibration and sensing

2011-03-01

2011-03-01

Caputo, Lisa M (Department: 2855)

Thermal measuring and testing

Temperature measurement

By electrical or magnetic heat sensor

C374S179000, C374S183000

Reexamination Certificate

active

07896545

ABSTRACT:
Some embodiments include apparatus and methods having a first switch, a second switch, and a circuit coupled to the first and second switches. The first switch may be configured to switch between an on-state and an off-state based on a value of a first current flowing through a number of resistors and a diode coupled in series with the resistors. The second switch may be configured to switch between the on-state and the off-state based on a value of a second current on a circuit path. The second current is a function of a voltage at a node between two of the resistors and a resistance of the circuit path. The circuit may be configured to provide a temperature reading based on the number of times the first switch or the second switch switches between the on-state and the off-state during a time interval.

REFERENCES:
patent: 5993060 (1999-11-01), Sakurai
patent: 2003/0118079 (2003-06-01), Marinet et al.
patent: 2004/0071189 (2004-04-01), Tanaka
patent: 2004/0071191 (2004-04-01), Sim et al.

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