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Class Information
Number: 324/679
Name: Electricity: measuring and testing > Impedance, admittance or other quantities representative of electrical stimulus/response relationships > Lumped type parameters > Using capacitive type measurement > With comparison or difference circuit
Description: Subject matter including means to match two or more electrical quantities for the purpose of determining their relative values.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7592819 |
Microprocessor-based capacitance measurement |
Sep. 22, 2009 |
| 7570066 |
Simultaneous detection of in-plane and out-of-plane position displacement with capacitive sensors |
Aug. 4, 2009 |
| 7557523 |
Discharge lamp lighting device, and lighting equipment and lighting system using the device |
Jul. 7, 2009 |
| 7533566 |
Fluid measuring device |
May. 19, 2009 |
| 7525322 |
Capacitive physical quantity sensor and diagnosis method |
Apr. 28, 2009 |
| 7518381 |
Touch sensor system and method |
Apr. 14, 2009 |
| 7501836 |
Apparatus and method for determining capacitance variation in an integrated circuit |
Mar. 10, 2009 |
| 7498822 |
Linear capacitance measurement and touchless switch |
Mar. 3, 2009 |
| 7456637 |
Measurement alignment system to determine alignment between chips |
Nov. 25, 2008 |
| 7456731 |
Capacitive-type physical quantity sensor |
Nov. 25, 2008 |
| 7411406 |
Power supply with current measurement circuit for transformer with high frequency output |
Aug. 12, 2008 |
| 7403021 |
Testing circuit for a data interface |
Jul. 22, 2008 |
| 7375535 |
Scan method and topology for capacitive sensing |
May. 20, 2008 |
| 7324029 |
Capacitance-to-digital interface circuit for differential pressure sensor |
Jan. 29, 2008 |
| 7323886 |
Linear capacitance measurement and touchless switch |
Jan. 29, 2008 |
| 7319421 |
Foldback free capacitance-to-digital modulator |
Jan. 15, 2008 |
| 7304483 |
One terminal capacitor interface circuit |
Dec. 4, 2007 |
| 7301350 |
Methods and systems for detecting a capacitance using sigma-delta measurement techniques |
Nov. 27, 2007 |
| 7288945 |
Systems and methods for detection of dielectric change in material and structure |
Oct. 30, 2007 |
| 7235983 |
One terminal capacitor interface circuit |
Jun. 26, 2007 |
| 7236113 |
Capacitance-to-digital modulator with sensor failure-mode detection |
Jun. 26, 2007 |
| 7230435 |
Capacitance measurement circuit |
Jun. 12, 2007 |
| 7129714 |
Capacitive measurement system |
Oct. 31, 2006 |
| 7119555 |
Circuit for detecting difference in capacitance |
Oct. 10, 2006 |
| 7109727 |
Capacitive physical quantity sensor |
Sep. 19, 2006 |
| 7102358 |
Overvoltage detection apparatus, method, and system |
Sep. 5, 2006 |
| 7102366 |
Proximity detection circuit and method of detecting capacitance changes |
Sep. 5, 2006 |
| 7084645 |
Capacitance detecting circuit and method, and fingerprint sensor using the same |
Aug. 1, 2006 |
| 7078918 |
Capacitance detecting circuit and method, and fingerprint sensor using the same |
Jul. 18, 2006 |
| 7071711 |
Method and device for determining the ratio between an RC time constant in an integrated circuit and a set value |
Jul. 4, 2006 |
| 7046018 |
Position sensor |
May. 16, 2006 |
| 7023222 |
Apparatus and method for processing capacitor sensor signals using digital frequency shift measurement techniques with floating reference |
Apr. 4, 2006 |
| 6940292 |
Circuit configuration for a capacitive sensor |
Sep. 6, 2005 |
| 6940294 |
Method and circuit for compensating MOSFET capacitance variations in integrated circuits |
Sep. 6, 2005 |
| 6879056 |
Converting sensed signals |
Apr. 12, 2005 |
| 6856143 |
System and method for measuring a capacitance of a conductor |
Feb. 15, 2005 |
| 6809527 |
METHOD OF MEASURING A CHARACTERISTIC OF A CAPACITIVE TYPE OF SENSOR, A SENSOR CHARACTERISTIC MEASURING APPARATUS, A CAPACITIVE TYPE OF SENSOR APPARATUS, AND AN IC CHIP FOR MEASURING A SENSOR C |
Oct. 26, 2004 |
| 6768319 |
Adaptive compensation of measurement error for industrial process control transmitters |
Jul. 27, 2004 |
| 6756792 |
Apparatus for measuring parasitic capacitances on an integrated circuit |
Jun. 29, 2004 |
| 6683462 |
Apparatus for and method of measuring capacitance with high accuracy |
Jan. 27, 2004 |
| 6639414 |
Circuit for measuring changes in capacitor gap using a switched capacitor technique |
Oct. 28, 2003 |
| 6633156 |
Device for monitoring the flow of a substantially direct current in a load and method for the implementation of this device |
Oct. 14, 2003 |
| 6630751 |
Excessive load capacitor detection circuit for UPS |
Oct. 7, 2003 |
| 6600333 |
Method and test structure for characterizing sidewall damage in a semiconductor device |
Jul. 29, 2003 |
| 6504384 |
Apparatus of measuring capacitance and method thereof |
Jan. 7, 2003 |
| 6501283 |
Circuit configuration for measuring the capacitance of structures in an integrated circuit |
Dec. 31, 2002 |
| 6501282 |
Highly sensitive capacitance comparison circuit |
Dec. 31, 2002 |
| 6486683 |
Variable reactance position detector |
Nov. 26, 2002 |
| 6483322 |
Capacitive physical quantity sensor |
Nov. 19, 2002 |
| 6448792 |
Sensor for edge position of electro-conductive material |
Sep. 10, 2002 |
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