| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
|---|
| 06/11/1985 | US4523143 Digital logic level comparator particularly for digital test systems |
| 06/05/1985 | EP0143172A1 Isolation circuit for measuring a DC voltage |
| 06/05/1985 | EP0143111A1 Self-checking window comparator circuit |
| 06/04/1985 | US4521769 Device for detecting the failure of a sensor |
| 06/04/1985 | US4521735 Battery voltage level detecting apparatus |
| 06/04/1985 | US4521727 Hall effect circuit with temperature compensation |
| 06/04/1985 | CA1188367A1 Method and circuitry for sine wave reconstruction |
| 05/28/1985 | US4520298 Method and apparatus for sampling output AC currents in a voltage-fed inverter power supply |
| 05/21/1985 | USRE31896 Chart recorders |
| 05/21/1985 | US4519024 Two-terminal transistor rectifier circuit arrangement |
| 05/21/1985 | US4518913 Measuring probes |
| 05/21/1985 | US4518877 Precision absolute value amplifier for a precision voltmeter |
| 05/21/1985 | US4518870 Common mode signal detector |
| 05/21/1985 | US4518869 Resistance comparator for switch detection |
| 05/21/1985 | CA1187554A1 Portable devices to determine if a high or very high a.c. voltage installation is live or dead |
| 05/15/1985 | EP0141698A1 Low power dissipation current detector, and control circuit of an electronic device equipped therewith |
| 05/15/1985 | EP0141681A2 Test input multiplexing circuit |
| 05/14/1985 | US4517517 Nickel-cadmium battery conditioner and tester apparatus |
| 05/14/1985 | US4517455 Dual peak detector |
| 05/08/1985 | EP0140418A1 Active double-sided rectifier circuit |
| 05/08/1985 | EP0140124A1 Comparator circuit |
| 05/07/1985 | US4516008 System for calculating the root mean square (RMS) current in a resistance welding system |
| 04/30/1985 | US4514724 Electrical warning system for malfunctions in refrigeration |
| 04/30/1985 | US4514619 Indirect current monitoring via voltage and impedance monitoring |
| 04/24/1985 | EP0138610A2 Electron detector |
| 04/23/1985 | US4513339 Current detecting apparatus |
| 04/23/1985 | US4513245 DC current detector |
| 04/23/1985 | US4513209 Level detector |
| 04/23/1985 | US4513179 Loop test circuit |
| 04/17/1985 | EP0137347A1 A detector circuit for current measurements |
| 04/17/1985 | EP0137263A2 Overcurrent detection device |
| 04/17/1985 | EP0137093A2 Method of measuring the voltage induced in the coil of a stepping motor by the rotation of its rotor |
| 04/16/1985 | US4512027 Electronic calculating device with faculties of detecting reproduction level of data applied thereto |
| 04/16/1985 | US4511890 Energization indicator for time switch |
| 04/16/1985 | US4511810 Voltage comparator circuit |
| 04/16/1985 | CA1185660A1 System for monitoring utility usage |
| 04/11/1985 | WO1985001622A1 Common mode signal detector |
| 04/09/1985 | US4510444 Digital measuring device with liquid-crystal picture screen |
| 04/09/1985 | US4510443 Voltage measuring device |
| 04/09/1985 | US4510442 Measuring system for exceedingly weak currents |
| 04/03/1985 | EP0135759A2 Circuit arrangement for the conversion of an input voltage lying within a predetermined frequency range of operation into a proportional output voltage |
| 04/02/1985 | US4509102 Voltage controlled current switch with short circuit protection |
| 03/27/1985 | EP0134943A1 System and method for detecting proximity to electrical power lines |
| 03/27/1985 | EP0134925A1 Comparator circuit having full supply common mode input |
| 03/26/1985 | US4507740 Programmable signal analyzer |
| 03/26/1985 | US4507571 Optically coupled input circuit for digital control |
| 03/19/1985 | US4506214 Measuring transformer |
| 03/19/1985 | US4506175 Digital phase comparator circuit producing sign and magnitude outputs |
| 03/19/1985 | US4506169 Peak amplitude detector |
| 03/14/1985 | WO1985001161A1 Improvements in or relating to rectifier circuits |
| 03/13/1985 | EP0133969A1 Solid state overcurrent detector |
| 03/13/1985 | EP0133968A1 Solid state overcurrent detector |
| 03/12/1985 | US4504781 Voltage wand |
| 03/12/1985 | CA1183942A1 Broadband radiation detector for microwave and lower frequencies |
| 03/12/1985 | CA1183898A1 Fault indicator having increased sensitivity to fault currents |
| 03/05/1985 | US4503465 Analog signal comparator using digital circuitry |
| 03/05/1985 | US4503390 Switchless voltage, continuity and polarity indicator |
| 03/05/1985 | US4503389 Portable DC device for verifying absence of voltage in high-tension AC conductors |
| 03/05/1985 | US4502774 Battery check device for camera |
| 03/05/1985 | CA1183580A1 Peak amplitude detector |
| 02/26/1985 | US4502013 Input converting circuit |
| 02/26/1985 | US4502004 Current pulse monitor |
| 02/20/1985 | EP0133350A2 RMS converters |
| 02/19/1985 | US4500840 High speed, power potentiostat/galvanostat with IR compensation for use with an electrochemical cell |
| 02/19/1985 | US4500837 Detection of DC content in an AC waveform |
| 02/13/1985 | EP0132745A2 Device for measuring direct currents |
| 02/13/1985 | EP0132728A1 Device for controlling alternating high voltages |
| 02/12/1985 | US4499433 Autolock for resonators for frequency standards |
| 02/12/1985 | US4499419 Methods and apparatus for assessing the quality of logic signals |
| 02/05/1985 | US4498040 Reference voltage circuit |
| 02/05/1985 | US4498039 Instrument for use with an electrochemical cell |
| 02/05/1985 | CA1182173A1 Conductive fluid probe powering means |
| 01/29/1985 | US4496939 Power indicator apparatus for a DC to DC flyback converter |
| 01/29/1985 | US4496855 High voltage level detector and method |
| 01/22/1985 | US4495642 Timing analyzer with combination transition and duration trigger |
| 01/22/1985 | US4495489 Fault indicator with improved flag indicator assembly |
| 01/22/1985 | US4495461 Waveform crossing detector |
| 01/16/1985 | EP0131474A2 Control system |
| 01/15/1985 | US4494019 Low level signal comparator apparatus |
| 01/15/1985 | US4494013 Gating circuit with spurious signal prevention means |
| 01/09/1985 | EP0130706A1 Electronic circuitry with self-calibrating feedback for use with an optical current sensor |
| 01/09/1985 | EP0130646A1 Synchronized comparator |
| 01/09/1985 | EP0130383A1 Signal selection circuit |
| 01/08/1985 | US4492916 For measuring an analog value |
| 01/02/1985 | EP0130094A1 Multiple level voltage comparator circuit |
| 01/02/1985 | EP0129817A1 Circuit with a Hall generator |
| 01/02/1985 | CA1180388A Method and circuit arrangement for non-contacting measurement of direct and alternating currents more particularly instantaneous current-values |
| 01/02/1985 | CA1180386A Circuit for detecting loss of supply voltage |
| 01/01/1985 | US4491799 Device for indicating pole-zero cancellation, in particular for amplifiers for ionizing radiation spectroscopy |
| 12/27/1984 | EP0129508A1 Examining and testing method of an electric device of the integrated or printed circuit type |
| 12/27/1984 | EP0129498A1 Electrical equipment with a circuit arrangement to show several operating modes using diodes |
| 12/27/1984 | CA1180064A Method and apparatus for automatically detecting signal levels |
| 12/25/1984 | US4490803 Temperature compensation of a resistance bridge circuit |
| 12/19/1984 | EP0128492A2 Method of measuring the D.C. level of the output of an A.C.-to-D.C. power converter |
| 12/18/1984 | USRE31774 Measuring system |
| 12/18/1984 | US4489285 Signal processing circuit employing an improved composite current mirror circuit/device |
| 12/18/1984 | US4488811 Base-line correction means for spectrophotometer system |
| 12/11/1984 | US4488117 Method of measuring backelectromotive forces of aluminum electrolysis cells |
| 12/11/1984 | US4488110 Voltage monitor with visible level indicator |
| 12/06/1984 | WO1984004819A1 Method for inspecting and testing an electric device of the printed or integrated circuit type |