| Patents for G01R 29 - Arrangements for measuring or indicating electric quantities not covered by groups (11,937) |
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| 08/04/1990 | CA2046630A1 Sensor |
| 07/31/1990 | US4945304 Device for monitoring the unbalance of the electric power demanded |
| 07/31/1990 | US4944592 Device and method for quantum nondemolition measurements using parametric oscillation |
| 07/31/1990 | US4944369 Safety device for elevator |
| 07/26/1990 | DE3901891A1 Device for measuring and/or monitoring the strength of an electrostatic field |
| 07/25/1990 | EP0379050A1 Spectrum analyzer having functions for simultaneously executing plural kinds of detections and displaying resultants thereof |
| 07/25/1990 | EP0378875A2 Noise measurement for video signals |
| 07/18/1990 | EP0378405A2 Method and apparatus for measuring phase accuracy and amplitude profile of a continuous-phase-modulation signal |
| 07/18/1990 | CN1043992A Space line-frequency electric field measuring device |
| 07/18/1990 | CN1043991A Method of each line-frequency signal-watched by oscillograph |
| 07/17/1990 | US4942318 For conditioning the input to or the output from an integrated circuit |
| 07/17/1990 | CA1271857A1 Sweep generator error characterization |
| 07/17/1990 | CA1271841A1 Resonant loop current perturbing probe |
| 07/17/1990 | CA1271840A1 Amplitude modulated electrical signal analysis circuit having a frequency converter |
| 07/11/1990 | CN2059246U Rc phase sequence measurer |
| 07/11/1990 | CN1043789A Extraneous frequency detector |
| 07/10/1990 | US4940947 Line noise signal measurement system using analog signal compression with digital linearity correction |
| 07/10/1990 | US4940328 For sensing a property of an environment |
| 07/04/1990 | EP0376539A2 Method and device for excess modulation detection for signal analysis |
| 07/03/1990 | US4939788 Circuit arrangement for indicating electric field strength |
| 07/03/1990 | US4939447 Fiber-optic voltage sensor |
| 07/03/1990 | US4939389 VLSI performance compensation for off-chip drivers and clock generation |
| 06/27/1990 | EP0375285A2 Extraneous frequency detector |
| 06/27/1990 | EP0327545A4 Determination of particle size and electric charge. |
| 06/27/1990 | CN2058757U Electrostatic-induction type probe |
| 06/26/1990 | US4937520 Instrument to measure the errors of apparent power meters |
| 06/21/1990 | DE3842196A1 Screened double-funnel cell having an absorbent inner conductor |
| 06/20/1990 | CN2058497U Automatic testing device for ratio of transformer |
| 06/19/1990 | US4934819 Apparatus for measuring transverse moment of an electromagnetic field associated with an optical beam |
| 06/19/1990 | CA2004136A1 Extraneous frequency detector |
| 06/19/1990 | CA1270523A1 Phase identifier |
| 06/12/1990 | US4933634 Device and method to measure a short radiation pulse or an electric pulse |
| 06/06/1990 | EP0371101A1 Electric field and temperature probe |
| 06/05/1990 | US4932075 High speed wide range variable rate power detector |
| 06/05/1990 | US4931798 Electromagnetic anechoic chamber with an inner electromagnetic wave reflection surface and an electromagnetic wave absorption small ball disposed in the chamber |
| 06/05/1990 | US4931748 Integrated circuit with clock generator |
| 06/05/1990 | US4931739 Meter for measuring the electric charge of a body |
| 05/30/1990 | EP0370923A1 Method and apparatus for the detection of pulses caused by domestic or human electrostatic discharges |
| 05/30/1990 | EP0370421A1 Electromagnetic wave absorber |
| 05/30/1990 | CN1042610A Inspection and measuring circuit for triple-phased power balance |
| 05/29/1990 | US4929960 Peak radiated energy locator |
| 05/29/1990 | US4929886 Apparatus for detecting noise in the measurement of very small resistance |
| 05/29/1990 | US4929830 Fiber-optic electric field sensor with piezoelectric body sensor |
| 05/29/1990 | US4929050 Traveling wave fiber optic interferometric sensor and method of polarization poling fiber optic |
| 05/23/1990 | EP0369273A1 Method for comparing the quality of HF absorbers |
| 05/23/1990 | CN1042420A Method for measuring space distribution of electromagnetic radiation intensity |
| 05/22/1990 | US4928057 High speed D.C. non-contacting electrostatic voltage follower |
| 05/17/1990 | WO1990005322A1 Optical sensing apparatus and method |
| 05/16/1990 | EP0368581A1 Method of compensating for frequency errors in noise power meters |
| 05/16/1990 | EP0367807A1 Harmonimeter, and methods of utilizing and constructing same |
| 05/15/1990 | CA1269134A1 Near field probe |
| 05/11/1990 | CA2002324A1 Method for comparing the quality of rf absorbers |
| 05/09/1990 | EP0367462A1 Measurement of electromagnetic wave leakage |
| 05/09/1990 | EP0367006A2 Device for generating a reference voltage for a switching circuit including a capacitive bootstrap circuit |
| 05/02/1990 | EP0366312A1 Noise parameter test method and apparatus |
| 05/02/1990 | CN1041850A Reflection-free termination of tem waveguide |
| 05/01/1990 | US4922195 Extraneous frequency detector |
| 04/26/1990 | DE3835797A1 Pulse discriminator circuit |
| 04/25/1990 | CN2056516U Phase sequence multi-purpose electricity test pen |
| 04/24/1990 | US4920522 Method and apparatus for measuring electrical or magnetic fields |
| 04/19/1990 | WO1990004287A1 Process and device for monitoring failures of timing signals |
| 04/18/1990 | EP0363831A1 Reflectionless terminal of a TEM wave guide |
| 04/18/1990 | EP0363830A1 Electrical installation with a galvanic signal-carrying conductor, and an interference indicator therefor |
| 04/17/1990 | US4918684 Device for the measurement of intermodulation products of a receiver system |
| 04/17/1990 | US4918373 R.F. phase noise test set using fiber optic delay line |
| 04/17/1990 | US4918372 Method of measuring the thermal hysteresis of quartz crystal resonators |
| 04/17/1990 | CA1267934A1 Conductive emi test system, a decoupling network therefor |
| 04/11/1990 | EP0362491A2 Method and circuit arrangement for measuring jitter modulation in digital signals containing zeros |
| 04/11/1990 | EP0362410A1 Transition condition detector |
| 04/05/1990 | WO1990003571A1 Method and apparatus for charge distribution analysis |
| 04/05/1990 | DE3831866A1 Method for measuring the AM/PM conversion Kp and the compression C of a microwave link and circuit arrangement for carrying out the method |
| 04/04/1990 | EP0361656A1 Method and apparatus for testing transducers |
| 03/28/1990 | EP0360519A2 Timing measurement for jitter display |
| 03/28/1990 | CN2055259U Numeric display three-phase phase sequence indicator |
| 03/27/1990 | US4912459 Detection of lightning, storms and the like |
| 03/27/1990 | EP0226631A4 Method and apparatus for editing particle produced electrical pulses. |
| 03/21/1990 | CN2054908U Digital high-voltage phasing instrument |
| 03/21/1990 | CN1007292B Nondestructive readout of a latent electrostatic image formed on an insulating material |
| 03/20/1990 | US4910522 Electromagnetic test method |
| 03/14/1990 | EP0358342A1 A microwave radiometer |
| 03/14/1990 | EP0358189A2 Level determining circuit generating output signal at first or second output terminal according to level of input signal |
| 03/13/1990 | US4908771 Method of, and apparatus for, processing distorted pulsed signals |
| 03/08/1990 | WO1990002420A1 Method for measuring spatial distribution of electromagnetic radiation intensity |
| 03/07/1990 | EP0357532A2 Improvements in performance sensing for integrated circuit chips |
| 03/06/1990 | US4906998 Radio-frequency anechoic chamber |
| 03/06/1990 | CA1266509A1 Device for measuring the electrical field by an optical method |
| 02/28/1990 | EP0355466A2 Integrated circuit with clock generator circuit |
| 02/28/1990 | EP0355114A1 Device for measuring, at a plurality of points, the microwave field diffracted by an object. |
| 02/27/1990 | US4905308 Noise parameter determination method |
| 02/27/1990 | US4904947 Method and circuit for measuring pulse width |
| 02/27/1990 | US4904902 Ion implanting system |
| 02/21/1990 | CN1006950B Method and apparatus for editing particle produced electrical pulses |
| 02/20/1990 | US4902960 Voltage input for harmonimeter, and methods of constructing and utilizing same |
| 02/14/1990 | EP0354841A1 Appliance for monitoring the electric power disequilibrium in electric network lines or in an internal triphase installation |
| 02/14/1990 | CN2052906U Mini and small detector for electric field |
| 02/13/1990 | US4901009 Method and device for the automatic recording of signal curves |
| 02/07/1990 | EP0354135A1 Method and apparatus to check a quasi-sealed electromagnetic screen |
| 02/07/1990 | EP0353923A2 Electromagnetic wave absorber |
| 02/07/1990 | EP0353731A2 Anechoic chamber |
| 02/07/1990 | EP0215810B1 Circuit for obtaining an average value |