US Patent No: 7,880,459

Number of patents in Portfolio can not be more than 2000

Circuits and methods to produce a VPTAT and/or a bandgap voltage

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ALSO PUBLISHED AS: 20080278137
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Abstract

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Provided herein are circuits and methods to generate a voltage proportional to absolute temperature (VPTAT) and/or a bandgap voltage output (VGO). A circuit includes a group of X transistors. A first subgroup of the X transistors are used to produce a first base-emitter voltage (VBE1). A second subgroup of the X transistors are used to produce a second base-emitter voltage (VBE2). The VPTAT can be produced by determining a difference between VBE1 and VBE2. Which of the X transistors are in the first subgroup and used to produce the first base-emitter voltage (VBE1), and/or which of the X transistors are in the second subgroup and used to produce the second base-emitter voltage (VBE2), change over time. Additionally, a circuit portion can be used to generates a voltage complimentary to absolute temperature (VCTAT) using at least one of the X transistors. The VPTAT and the VCTAT can be added to produce the VGO.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
INTERSIL AMERICAS INC.MILPITAS, CA693

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harvey, Barry Los Altos, CA 57 206

Cited Art Landscape

Patent Info (Count) # Cites Year
 
NATIONAL SEMICONDUCTOR CORPORATION (4)
6,736,540 Method for synchronized delta-VBE measurement for calculating die temperature 30 2003
6,957,910 Synchronized delta-VBE measurement system 27 2004
7,309,157 Apparatus and method for calibration of a temperature sensor 11 2004
7,236,048 Self-regulating process-error trimmable PTAT current source 13 2005
 
ANALOG DEVICES, INC. (3)
5,519,354 Integrated circuit temperature sensor with a programmable offset 37 1995
5,982,221 Switched current temperature sensor circuit with compounded .DELTA.V.sub.BE 61 1997
7,170,334 Switched current temperature sensing circuit and method to correct errors due to beta and series resistance 12 2005
 
STANDARD MICROSYSTEMS CORPORATION (2)
7,281,846 Integrated resistance cancellation in temperature measurement systems 45 2004
7,193,543 Conversion clock randomization for EMI immunity in temperature sensors 12 2005
 
CYPRESS SEMICONDUCTOR CORPORATION (1)
2007/0152,740 Low power bandgap reference circuit with increased accuracy and reduced area consumption 5 2005
 
DELPHI TECHNOLOGIES, INC. (1)
5,619,122 Temperature dependent voltage generator with binary adjustable null voltage 24 1995
 
FREESCALE SEMICONDUCTOR, INC. (1)
6,019,508 Integrated temperature sensor 37 1998
 
GLOBAL MIXED-MODE TECHNOLOGY INC. (1)
7,341,374 Temperature measurement circuit calibrated through shifting a conversion reference level 12 2005
 
GLOBALFOUNDRIES INC. (1)
6,157,244 Power supply independent temperature sensor 39 1998
 
HIMAX TECHNOLOGIES, INC. (1)
7,312,648 Temperature sensor 10 2005
 
INTERSIL AMERICAS INC. (1)
6,914,475 Bandgap reference circuit for low supply voltage applications 7 2002
 
KABUSHIKI KAISHA TOSHIBA (1)
6,037,832 Temperature dependent constant-current generating circuit and light emitting semiconductor element driving circuit using the same 41 1998
 
MICREL, INC. (1)
6,008,685 Solid state temperature measurement 97 1998
 
RENESAS ELECTRONICS CORPORATION (1)
6,890,097 Temperature measuring sensor incorporated in semiconductor substrate, and semiconductor device containing such temperature measuring sensor 26 2003
 
SEIKO INSTRUMENTS INC. (1)
7,368,973 Temperature sensor circuit 9 2004
 
SEMICONDUCTOR COMPONENTS INDUSTRIES OF RHODE ISLAND, INC. (1)
5,796,280 Thermal limit circuit with built-in hysteresis 11 1997
 
SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC (1)
6,554,469 Four current transistor temperature sensor and method 87 2001
 
SILICON LABORATORIES INC. (1)
7,321,225 Voltage reference generator circuit using low-beta effect of a CMOS bipolar transistor 13 2004
 
TEXAS INSTRUMENTS INCORPORATED (1)
7,083,328 Remote diode temperature sense method with parasitic resistance cancellation 10 2004
 
U.S. Philips Corporation (1)
4,952,866 Voltage-to-current converters 21 1989

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
CYPRESS SEMICONDUCTOR CORPORATION (4)
8,516,025 Clock driven dynamic datapath chaining 0 2008
8,130,025 Numerical band gap 0 2008
8,476,928 System level interconnect with programmable switching 0 2011
8,462,576 State-monitoring memory element 0 2011
 
INTERSIL AMERICAS INC. (3)
8,446,140 Circuits and methods to produce a bandgap voltage with low-drift 0 2010
8,278,905 Rotating gain resistors to produce a bandgap voltage with low-drift 0 2010
8,330,445 Circuits and methods to produce a VPTAT and/or a bandgap voltage with low-glitch preconditioning 1 2010
 
HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE CO., LTD. (1)
8,193,854 Bi-directional trimming methods and circuits for a precise band-gap reference 1 2010
 
MICROCHIP TECHNOLOGY INCORPORATED (1)
8,022,751 Systems and methods for trimming bandgap offset with bipolar elements 4 2009
 
MSTAR SEMICONDUCTOR, INC. (1)
7,915,947 PTAT sensor and temperature sensing method thereof 0 2009

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