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Class Information
Number: 324/681
Name: Electricity: measuring and testing > Impedance, admittance or other quantities representative of electrical stimulus/response relationships > Lumped type parameters > Using capacitive type measurement > With frequency signal response, change or processing circuit
Description: Subject matter including circuit means to determine or alter a signal as a function of frequency.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7619421 |
Systems and methods for detecting capacitor process variation |
Nov. 17, 2009 |
| 7598752 |
Charge transfer device and method, touch sensing device and method |
Oct. 6, 2009 |
| 7425836 |
Measuring chip-to-chip capacitance differentials by demodulating signals over a capacitance bridge |
Sep. 16, 2008 |
| 7292050 |
Measuring rotational misalignment using spatial interference patterns |
Nov. 6, 2007 |
| 7259574 |
Sensor device for measuring frequency and amplitude of varying force signals |
Aug. 21, 2007 |
| 7173438 |
Measuring capacitance |
Feb. 6, 2007 |
| 7138809 |
Electrical capacitance proximity sensor |
Nov. 21, 2006 |
| 7126352 |
Method and device for determining the moisture content and conductivity in the ground and in bulk materials |
Oct. 24, 2006 |
| 7123028 |
Force detector |
Oct. 17, 2006 |
| 7119554 |
Electrical capacitance proximity sensor |
Oct. 10, 2006 |
| 7119551 |
Capacitive sensor |
Oct. 10, 2006 |
| 7091727 |
Method and IC for detecting capacitance variation |
Aug. 15, 2006 |
| 6980009 |
Structure for measurement of capacitance of ultra-thin dielectrics |
Dec. 27, 2005 |
| 6943564 |
Active-drive type pixel structure and inspection method therefor |
Sep. 13, 2005 |
| 6914425 |
Measurement circuit with improved accuracy |
Jul. 5, 2005 |
| 6911873 |
Detection circuit and method for an oscillator |
Jun. 28, 2005 |
| 6859048 |
Force detector |
Feb. 22, 2005 |
| 6809529 |
Force detector |
Oct. 26, 2004 |
| 6774644 |
Method and circuit for compensating MOSFET capacitance variations in integrated circuits |
Aug. 10, 2004 |
| 6728647 |
Determination of capacitances of individual resources in programmable logic devices |
Apr. 27, 2004 |
| 6714025 |
Method and apparatus for synchronous demodulation of multiply modulated signals |
Mar. 30, 2004 |
| 6657444 |
Capacitance-based position sensor with integrating demodulator |
Dec. 2, 2003 |
| 6566894 |
Process and device for detecting oxidizable and/or reducible gases in air |
May. 20, 2003 |
| 6559658 |
Noise resistant electronic presence sensor |
May. 6, 2003 |
| 6501284 |
Capacitive finger detection for fingerprint sensor |
Dec. 31, 2002 |
| 6486683 |
Variable reactance position detector |
Nov. 26, 2002 |
| 6483323 |
Projectile with variable target transition detection capability and method therefor |
Nov. 19, 2002 |
| 6448792 |
Sensor for edge position of electro-conductive material |
Sep. 10, 2002 |
| 6373264 |
Impedance detection apparatus and method of physical variable |
Apr. 16, 2002 |
| 6333680 |
Method and system for characterizing coupling capacitance between integrated circuit interconnects |
Dec. 25, 2001 |
| 6310482 |
Capacitance gauge tracking apparatus used for exposure system for manufacturing semiconductor device, method for the tracking surface of semiconductor device using the same, leveling apparatus |
Oct. 30, 2001 |
| 6262589 |
TFT array inspection method and device |
Jul. 17, 2001 |
| 6184688 |
Method of measuring insulation resistance of capacitor and apparatus for screening characteristics |
Feb. 6, 2001 |
| 6130541 |
Adaptive driver with capacitive load sensing and method of operation |
Oct. 10, 2000 |
| 5963043 |
Method and apparatus for characterized parasitic capacitance between integrated-circuit interconnects |
Oct. 5, 1999 |
| 5952835 |
Non-contact proximity detector to detect the presence of an object |
Sep. 14, 1999 |
| 5861756 |
Method of detecting accretion of frazil ice on water |
Jan. 19, 1999 |
| 5790479 |
Method for characterizing interconnect timing characteristics using reference ring oscillator circuit |
Aug. 4, 1998 |
| 5767686 |
Device for contactless detection of the position of a moving web |
Jun. 16, 1998 |
| 5757196 |
Capacitive switch actuated by changes in a sensor capacitance |
May. 26, 1998 |
| 5694046 |
Method and apparatus for monitoring thermal processing of a workpiece in accordance with a measured capacitance frequency distribution |
Dec. 2, 1997 |
| 5670887 |
Method and apparatus for fast sampling in capacitive position transducers |
Sep. 23, 1997 |
| 5650729 |
Conductive strip detector |
Jul. 22, 1997 |
| 5602333 |
Apparatus for measuring the level of a liquid in a tank |
Feb. 11, 1997 |
| 5594353 |
Method and apparatus for measuring the change in capacitance values in dual capacitors |
Jan. 14, 1997 |
| 5532606 |
Electrical testing process |
Jul. 2, 1996 |
| 5521515 |
Frequency scanning capaciflector for capacitively determining the material properties |
May. 28, 1996 |
| 5461320 |
Capacitive measuring device for determining displacement by evaluating the change in the basic frequency |
Oct. 24, 1995 |
| 5418468 |
Apparatus for determining the position and velocity of a moving object |
May. 23, 1995 |
| 5399979 |
Capacitance probe assembly |
Mar. 21, 1995 |
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