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
Stats
-
Feb 1, 2011
Issued date -
Apr 29, 2008
filing date -
12/111,796
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
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.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 6,736,540 Method for synchronized delta-VBE measurement for calculating die temperature | 28 | 2003 | |
| 6,957,910 Synchronized delta-VBE measurement system | 24 | 2004 | |
| 7,309,157 Apparatus and method for calibration of a temperature sensor | 10 | 2004 | |
| 7,236,048 Self-regulating process-error trimmable PTAT current source | 11 | 2005 | |
|
|
|||
| 5,519,354 Integrated circuit temperature sensor with a programmable offset | 36 | 1995 | |
| 5,982,221 Switched current temperature sensor circuit with compounded .DELTA.V.sub.BE | 59 | 1997 | |
| 7,170,334 Switched current temperature sensing circuit and method to correct errors due to beta and series resistance | 11 | 2005 | |
|
|
|||
| 7,281,846 Integrated resistance cancellation in temperature measurement systems | 38 | 2004 | |
| 7,193,543 Conversion clock randomization for EMI immunity in temperature sensors | 9 | 2005 | |
|
|
|||
| 2007/0152,740 Low power bandgap reference circuit with increased accuracy and reduced area consumption | 3 | 2005 | |
|
|
|||
| 5,619,122 Temperature dependent voltage generator with binary adjustable null voltage | 23 | 1995 | |
|
|
|||
| 6,019,508 Integrated temperature sensor | 36 | 1998 | |
|
|
|||
| 7,341,374 Temperature measurement circuit calibrated through shifting a conversion reference level | 10 | 2005 | |
|
|
|||
| 6,157,244 Power supply independent temperature sensor | 37 | 1998 | |
|
|
|||
| 7,312,648 Temperature sensor | 9 | 2005 | |
|
|
|||
| 6,914,475 Bandgap reference circuit for low supply voltage applications | 6 | 2002 | |
|
|
|||
| 6,037,832 Temperature dependent constant-current generating circuit and light emitting semiconductor element driving circuit using the same | 36 | 1998 | |
|
|
|||
| 6,008,685 Solid state temperature measurement | 88 | 1998 | |
|
|
|||
| 6,890,097 Temperature measuring sensor incorporated in semiconductor substrate, and semiconductor device containing such temperature measuring sensor | 25 | 2003 | |
|
|
|||
| 7,368,973 Temperature sensor circuit | 8 | 2004 | |
|
|
|||
| 5,796,280 Thermal limit circuit with built-in hysteresis | 10 | 1997 | |
|
|
|||
| 6,554,469 Four current transistor temperature sensor and method | 77 | 2001 | |
|
|
|||
| 7,321,225 Voltage reference generator circuit using low-beta effect of a CMOS bipolar transistor | 11 | 2004 | |
|
|
|||
| 7,083,328 Remote diode temperature sense method with parasitic resistance cancellation | 9 | 2004 | |
|
|
|||
| 4,952,866 Voltage-to-current converters | 20 | 1989 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Aug 1, 2014 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Aug 1, 2018 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 1, 2022 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |