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Class Information
Number: 324/606
Name: Electricity: measuring and testing > Impedance, admittance or other quantities representative of electrical stimulus/response relationships > With auxiliary means to condition stimulus/response signals > For response signal evaluation or processing > Including a signal comparison circuit
Description: Subject matter wherein the several quantities are matched for the purpose of determining their relative values to evaluate signal correlation, difference or compensation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7383141 |
Faraday system integrity determination |
Jun. 3, 2008 |
| 7307411 |
Method for signal extraction in a universal sensor IC |
Dec. 11, 2007 |
| 7281181 |
Systems, methods and computer programs for calibrating an automated circuit test system |
Oct. 9, 2007 |
| 7251284 |
QAM receiver |
Jul. 31, 2007 |
| 7235985 |
Method and device for signal amplitude detection |
Jun. 26, 2007 |
| 7208759 |
Semiconductor integrated circuit device and method of testing the same |
Apr. 24, 2007 |
| 7151559 |
Reception performance measuring apparatus for television signal |
Dec. 19, 2006 |
| 7123025 |
Differential comparator circuit, test head, and test apparatus |
Oct. 17, 2006 |
| 7068047 |
Residual current detection circuit |
Jun. 27, 2006 |
| 7064557 |
Calibration circuit and method for filter bandwidth which is parasitic capacitance sensitive or insensitive |
Jun. 20, 2006 |
| 7057397 |
Output impedance measurement techniques |
Jun. 6, 2006 |
| 7046014 |
ATE measurement technique for comparator threshold voltage |
May. 16, 2006 |
| 7005841 |
Process for the relative locating of two electrical appliances |
Feb. 28, 2006 |
| 6965275 |
Method and apparatus for tuning a filter |
Nov. 15, 2005 |
| 6943561 |
Method of and an apparatus for collecting RF input and output and biasing signal data of a device under test |
Sep. 13, 2005 |
| 6859696 |
System and method for monitoring machine status |
Feb. 22, 2005 |
| 6836127 |
Dual switching reference voltages |
Dec. 28, 2004 |
| 6806721 |
Digital envelope detector |
Oct. 19, 2004 |
| 6639393 |
Methods and apparatus for time-domain measurement with a high frequency circuit analyzer |
Oct. 28, 2003 |
| 6598003 |
Power and environmental condition monitoring system and method |
Jul. 22, 2003 |
| 6594595 |
Apparatus for and method of measuring cross-correlation coefficient between signals |
Jul. 15, 2003 |
| 6573696 |
Evaluation method for a particle counter and device for carrying out said method |
Jun. 3, 2003 |
| 6515464 |
Input voltage offset calibration of an analog device using a microcontroller |
Feb. 4, 2003 |
| 6462558 |
Electronic circuit for monitoring voltage variation |
Oct. 8, 2002 |
| 6462557 |
System for the complete diagnosis of a driver |
Oct. 8, 2002 |
| 6462559 |
Digital envelope detector |
Oct. 8, 2002 |
| 6459277 |
Line impedance calibration using actual impedance determination |
Oct. 1, 2002 |
| 6414496 |
Comparator structures and methods for automatic test equipment |
Jul. 2, 2002 |
| 6360123 |
Apparatus and method for determining a mechanical property of an organ or body cavity by impedance determination |
Mar. 19, 2002 |
| 6316943 |
Signal generator |
Nov. 13, 2001 |
| 6262634 |
Phase-locked loop with built-in self-test of phase margin and loop gain |
Jul. 17, 2001 |
| 6064312 |
Method and apparatus for automatic verification of measurement probe functionality and compensation |
May. 16, 2000 |
| 6028425 |
Signal generator |
Feb. 22, 2000 |
| 6009425 |
System and method for performing record deletions using index scans |
Dec. 28, 1999 |
| 5963044 |
Method for acquiring measured values by comparison with a stepped ramp voltage |
Oct. 5, 1999 |
| 5856803 |
Method and apparatus for detecting radio-frequency weapon use |
Jan. 5, 1999 |
| 5652712 |
Method and apparatus for calibration of digital test equipment |
Jul. 29, 1997 |
| 5596280 |
Apparatus and method for testing circuits by the response of a phase-locked loop |
Jan. 21, 1997 |
| 5396182 |
Low signal margin detect circuit |
Mar. 7, 1995 |
| 5332974 |
Network analyzer performance verification |
Jul. 26, 1994 |
| 5287064 |
Bonding point polarity determining apparatus |
Feb. 15, 1994 |
| 5250907 |
Digital signal measurement apparatus |
Oct. 5, 1993 |
| 5245295 |
Method of detecting a variation in stray capacitance by use of a PLL circuit |
Sep. 14, 1993 |
| 5168239 |
Method and apparatus for adjusting the threshold for determining the thickness of or the number of sheets in a sheet material |
Dec. 1, 1992 |
| 5162744 |
Method of determining settling time of a device under test |
Nov. 10, 1992 |
| 5135485 |
Capacitance-type fluid level sensor for i.v. and catheter bags |
Aug. 4, 1992 |
| 5107207 |
Method and an apparatus for testing AC characteristics of an integrated circuit |
Apr. 21, 1992 |
| 5053712 |
Method for comparing the quality of RF absorbers |
Oct. 1, 1991 |
| 5045787 |
Apparatus and method for measuring insulated track joint resistances |
Sep. 3, 1991 |
| 5029481 |
Cross-correlation apparatus and methods |
Jul. 9, 1991 |
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