US Patent No: 5,419,637

Number of patents in Portfolio can not be more than 2000

Method and apparatus for measuring temperature using an inherently calibrated p-n junction-type temperature sensor

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Abstract

An integrated circuit, diode-based temperature sensor circuit (10) is amenable to fabrication upon a readout circuit (12) that is coupled during use to a FPA or radiation detectors. The sensor circuit is inherently self-calibrated, and provides for a cancellation of circuit offsets and other error sources. The circuit has an output that is time-multiplexed onto a data path that normally conveys a video data stream away from the readout circuit. The circuit operates to selectively forward bias a diode (D1) with two different currents. A difference between the currents is shown to indicate the temperature of the diode's p-n junction.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
OL SECURITY LIMITED LIABILITY COMPANYDOVER, DE528

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Frye, William H Oceanside, CA 11 118
Woodbury, Eric J Santa Barbara, CA 1 15

Cited Art

Patent Info (Count) # Cites Year
 
ANALOG DEVICES, INC. (1)
5,195,827 Multiple sequential excitation temperature sensing method and apparatus 68 1992

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
STANDARD MICROSYSTEMS CORPORATION (7)
6,847,319 Temperature-to-digital converter 6 2003
7,030,793 Accurate testing of temperature measurement unit 5 2004
7,281,846 Integrated resistance cancellation in temperature measurement systems 39 2004
7,140,767 Programmable ideality factor compensation in temperature sensors 3 2004
7,429,129 Proportional settling time adjustment for diode voltage and temperature measurements dependent on forced level current 11 2005
7,622,903 EMI rejection for temperature sensing diodes 0 2005
7,193,543 Conversion clock randomization for EMI immunity in temperature sensors 10 2005
 
SCHNEIDER AUTOMATION INC. (2)
6,679,628 Solid state temperature measuring device and method 18 2001
7,048,438 Solid state temperature measuring device and method 3 2003
 
AVAGO TECHNOLOGIES GENERAL IP PTE. LTD. (1)
7,648,270 Temperature measurement of an integrated circuit 1 2004
 
GLOBALFOUNDRIES INC. (1)
5,961,215 Temperature sensor integral with microprocessor and methods of using same 91 1997
 
ILLINOIS TOOL WORKS INC. (1)
5,719,378 Self-calibrating temperature controller 65 1996
 
MAXIM INTEGRATED PRODUCTS, INC. (1)
5,990,725 Temperature measurement with interleaved bi-level current on a diode and bi-level current source therefor 14 1997
 
MOTOROLA SOLUTIONS, INC. (1)
5,781,075 Temperature sensing apparatus 24 1996
 
STMICROELECTRONICS ASIA PACIFIC PTE LTD. (1)
6,811,309 Thermal sensor circuit 8 2002