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Class Information
Number: 324/705
Name: Electricity: measuring and testing > Impedance, admittance or other quantities representative of electrical stimulus/response relationships > Lumped type parameters > Using resistance or conductance 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 |
| 7609075 |
Differential level shifter with automatic error compensation |
Oct. 27, 2009 |
| 7550980 |
System and method for characterizing a load at the end of a cable |
Jun. 23, 2009 |
| 7532017 |
Detection of presence or absence of AC maintain power signature in power-over-ethernet system |
May. 12, 2009 |
| 7492171 |
Systems and arrangements for sensing current with a low loss sense element |
Feb. 17, 2009 |
| 7414414 |
Spatially distributed guarded impedance |
Aug. 19, 2008 |
| 7411407 |
Testing target resistances in circuit assemblies |
Aug. 12, 2008 |
| 7411406 |
Power supply with current measurement circuit for transformer with high frequency output |
Aug. 12, 2008 |
| 7279909 |
Signal coincidence detection circuit |
Oct. 9, 2007 |
| 7271599 |
Semiconductor device |
Sep. 18, 2007 |
| 7248061 |
Transmission device for transmitting a signal through a transmission line between circuits blocks having different power supply systems |
Jul. 24, 2007 |
| 7197268 |
Current measurement circuit for transformer with high frequency output |
Mar. 27, 2007 |
| 7123032 |
Voltage sensor and dielectric material |
Oct. 17, 2006 |
| 6946848 |
Calibration configuration |
Sep. 20, 2005 |
| 6867604 |
Apparatus for accurately measuring battery voltage |
Mar. 15, 2005 |
| 6822431 |
Intrinsically safe sensor signal processing circuit |
Nov. 23, 2004 |
| 6750660 |
Apparatus for evaluating data representing the electrical characteristics of a combustion vessel |
Jun. 15, 2004 |
| 6700382 |
Method for detecting a switched state of a switch |
Mar. 2, 2004 |
| 6512383 |
System for measuring the alternating current equivalent series resistance of a conductor |
Jan. 28, 2003 |
| 6489785 |
Comparative contactless conductivity detector |
Dec. 3, 2002 |
| 6452405 |
Method and apparatus for calibrating a current sensing system |
Sep. 17, 2002 |
| 6433554 |
Method and apparatus for in-range fault detection of condition responsive sensor |
Aug. 13, 2002 |
| 6359450 |
System for checking the resistance of a load connected to a transformer |
Mar. 19, 2002 |
| 6328934 |
Device for detection of when a test probe gets into contact with a liquid surface |
Dec. 11, 2001 |
| 6208152 |
Redundant resistor matching detector with constant percentage threshold |
Mar. 27, 2001 |
| 6133741 |
Method for measuring resistance of load connected to a rotation transformer |
Oct. 17, 2000 |
| 6014030 |
Current-level monitor with hierarchical precision |
Jan. 11, 2000 |
| 5999002 |
Contact check for remote sensed measurement |
Dec. 7, 1999 |
| 5977777 |
Device in a motor vehicle for transmitting signals generated by means of a sensor |
Nov. 2, 1999 |
| 5796261 |
Method and device for detecting solenoid actuation |
Aug. 18, 1998 |
| 5763795 |
Sampling apparatus |
Jun. 9, 1998 |
| 5694047 |
Method and system for measuring antifuse resistance |
Dec. 2, 1997 |
| 5680054 |
Broken rail position detection using ballast electrical property measurement |
Oct. 21, 1997 |
| 5656928 |
Surrounding state measuring apparatus utilizing an impedance element |
Aug. 12, 1997 |
| 5614832 |
High voltage protected ohmmeter |
Mar. 25, 1997 |
| 5608333 |
Method of driving heating element to match its resistance, thermal printer, and resistance measuring device |
Mar. 4, 1997 |
| 5600255 |
Live circuit resistance measurement system and method |
Feb. 4, 1997 |
| 5596268 |
Method and apparatus for determining extent of cure in polymers |
Jan. 21, 1997 |
| 5572115 |
Device and method for measuring charge carrying activity in generally non-conductive materials |
Nov. 5, 1996 |
| 5528133 |
Method and apparatus for determining the quality of a colloidal suspension |
Jun. 18, 1996 |
| 5512837 |
Voltage drop detecting circuit |
Apr. 30, 1996 |
| 5506509 |
Circuit and method of measuring squib resistance |
Apr. 9, 1996 |
| 5483190 |
Floating voltage controlled thermistor/platinum probe emulator |
Jan. 9, 1996 |
| 5481199 |
System for improving measurement accuracy of transducer by measuring transducer temperature and resistance change using thermoelectric voltages |
Jan. 2, 1996 |
| 5469071 |
Resistor sensor input apparatus |
Nov. 21, 1995 |
| 5465042 |
Inactive state termination tester |
Nov. 7, 1995 |
| 5432435 |
Detection of cross-linking in pre-cure stage polymeric materials by measuring their impedance |
Jul. 11, 1995 |
| 5432460 |
Apparatus and method for opens and shorts testing of a circuit board |
Jul. 11, 1995 |
| 5412318 |
Device for detecting attempts at fraud on an apparatus for reading and writing on a chip card |
May. 2, 1995 |
| 5371469 |
Constant current loop impedance measuring system that is immune to the effects of parasitic impedances |
Dec. 6, 1994 |
| 5309085 |
Measuring circuit with a biosensor utilizing ion sensitive field effect transistors |
May. 3, 1994 |
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