Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 17 - Measuring arrangements involving comparison with a reference value, e.g. bridge
Patents for G01R 17 - Measuring arrangements involving comparison with a reference value, e.g. bridge (1,558)
05/1984
05/01/1984US4446527 High accuracy measuring apparatus
04/1984
04/04/1984EP0104439A1 Autozeroed comparator
04/03/1984US4441071 Temperature compensation circuit for thermocouples
03/1984
03/06/1984US4435653 In-phase voltage elimination circuit for Hall element
03/06/1984CA1163331A1 Switched capacitor comparator
01/1984
01/17/1984CA1160688A1 Device for measuring and indicating changes in resistance of a living body
12/1983
12/13/1983US4420745 Security system
11/1983
11/22/1983US4417160 Offset compensation apparatus for biasing an analog comparator
11/16/1983EP0024426B1 Method and apparatus for compensating for drift of the null point of a measuring device
11/15/1983US4414837 Apparatus and methods for the shunt calibration of semiconductor strain gage bridges
11/08/1983US4413917 Resistance measuring system
10/1983
10/18/1983US4410851 Method for the detection of insufficient dielectric strength of coil insulation
10/18/1983CA1155498A1 Peak detection and electronic compensation of d.c. saturation magnetization in current transformers used in watt hour meter installations
10/18/1983CA1155496A1 Electronic-magnetic current isolator circuit
10/12/1983EP0091397A1 Measuring arrangement for the exact positioning of the begin of the measuring range of a measuring converter
10/04/1983CA1154828A1 Alternating current comparator bridge for resistance measurement
09/1983
09/20/1983CA1154088A1 Current sensing circuit for power supply with series control transistor
08/1983
08/30/1983US4401940 Voltage equalizer bridge
08/16/1983US4399515 Self-correcting electronically scanned pressure sensor
07/1983
07/26/1983US4395681 System for compensating the offset voltage of a differential amplifier
07/12/1983US4393347 Common mode voltage rejection circuit
05/1983
05/18/1983EP0078898A1 Bridge circuit for measuring purposes
05/11/1983EP0027801B1 Strip chart recorder with a differential capacitor serving as position sensor in a position servo for the recording pen
05/03/1983US4381981 Mosfet current control device
04/1983
04/26/1983CA1145492A1 Device for displaying an analog signal on a display screen
04/13/1983EP0076392A1 Bridge for reactive detector circuit
03/1983
03/30/1983EP0075254A1 Method of generating a time division pulse train for a tracking control
03/01/1983US4375616 Non-loading digital voltmeter
02/1983
02/15/1983US4374362 Instrument zeroing circuit
01/1983
01/04/1983CA1138943A1 Charge amplifier with minimum offset voltage
01/04/1983CA1138932A1 Device for measuring and indicating changes in resistance of a living body
12/1982
12/28/1982US4365511 Data rate generator
12/21/1982CA1138115A1 Waveform digitizer
12/14/1982US4363370 Accurate weight measurement using digital to analog converter means and analog to digital converter means
11/1982
11/16/1982US4359717 Position-sensitive alarm system
10/1982
10/27/1982EP0063520A1 Electrical measuring switch for reactive impedances, and measuring bridge using such a switch
10/13/1982EP0062205A2 Electronic weighing apparatus
10/05/1982US4353029 Self inverting gauging system
10/05/1982US4353017 Velocity compensation for limited displacement motors
10/05/1982CA1133065A1 Method and apparatus for offset error correction
09/1982
09/14/1982US4349756 Phase detector with low offsets
09/02/1982WO1982002987A1 Phase detector with low offsets
08/1982
08/31/1982US4347469 Electronic-magnetic current isolator circuit
08/31/1982CA1130885A1 Security system
08/11/1982EP0057477A2 Control circuit with balancing device
08/03/1982CA1129007A1 Precision inductive voltage converter
08/03/1982CA1129003A1 Compensation of sensor voltage for reference potential variation
06/1982
06/22/1982US4336490 Voltage sensing apparatus for a voltage regulating transformer
06/09/1982EP0053581A1 Error-compensated high-voltage instrument transformer
06/02/1982EP0052981A1 Hall element circuit arranged to eliminate in-phase voltage
05/1982
05/25/1982US4332029 Automatic alignment system for a digital modem
05/25/1982US4331160 Method for detecting and recording physiological changes accompanying emotional stresses
05/18/1982CA1123968A1 Device for measuring a quantity which influences a field-effect transistor
05/05/1982EP0050705A1 Method and circuit for the contactless measuring of direct and alternating currents, especially momentary current values
05/04/1982US4328434 Comparator circuit with offset correction
04/1982
04/13/1982US4325009 Device for displaying an analog signal on a display screen
04/07/1982EP0049024A2 Switched capacitor comparator and method for eliminating the effects of inherent offset voltages when using, as a comparator, an opamp
04/06/1982US4323903 Strip chart recorder with a differential capacitor serving as position sensor in a position servo for the recording pen
03/1982
03/30/1982US4322679 Alternating current comparator bridge for resistance measurement
03/30/1982US4321832 High accuracy measuring apparatus
03/16/1982US4320347 Switched capacitor comparator
03/02/1982CA1119253A1 Capacitive pick-off circuit
03/02/1982CA1119252A1 Capacitive pick-off circuit
02/1982
02/17/1982EP0045814A1 Adjustable spiral spring for measuring instruments
02/09/1982US4315210 Bridge-balancing system for measuring extremely low currents
02/02/1982US4314326 Rectifying circuit with zero correction
02/02/1982US4314146 Analog display device
02/02/1982CA1117598A1 Bridge circuit
01/1982
01/26/1982CA1117185A1 Direct current measuring system for rectifiers
01/12/1982US4310841 Signal handling apparatus
01/05/1982US4309653 Elimination of line impedance error in a three-wire probe interface
12/1981
12/08/1981US4305132 Method to eliminate the noise at known frequency
11/1981
11/24/1981US4302738 Noise rejection circuitry for a frequency discriminator
11/24/1981US4302627 Dental stethoscope
11/17/1981US4301402 Electrical measuring circuit
11/17/1981US4300574 Device for measuring and indicating changes in resistance of a living body
10/1981
10/28/1981EP0038790A1 Method and apparatus for the detection of insufficient dielectric properties of the insulation of coil windings
10/27/1981US4297680 Analog waveform digitizer
10/07/1981EP0037385A2 Apparatus for counteracting the cathode current increase occurring during warming-up in a travelling-wave tube in response to variation in the grid-cathode distance
09/1981
09/29/1981US4292585 Leakage current testing circuit
09/22/1981CA1109523A1 Limited rotation motor
08/1981
08/28/1981EP0024426A4 Method and apparatus for compensating for drift of the null point of a measuring device.
07/1981
07/29/1981EP0032551A1 Method for compensating the drift voltage of an operational amplifier and resulting macro cell
07/14/1981US4278970 Alarm circuit for detecting overheated condition
07/14/1981US4278932 A.C. Bridges
07/14/1981US4278930 Current sensing circuit for power supply with series control transistor
07/07/1981US4277439 Gas component detector
06/1981
06/30/1981US4276499 Rotary actuator
06/24/1981EP0030592A1 A method of locating earth faults on conductors
06/16/1981US4274056 Charge amplifier with minimum offset voltage
06/10/1981EP0029903A1 Measuring arrangement for electric currents
05/1981
05/19/1981US4268837 Ink jet recording instrument
05/12/1981US4267504 Device for measuring a quantity which influences a field-effect transistor
05/05/1981USRE30603 Two wire current transmitter responsive to a resistance sensor input signal
03/1981
03/11/1981EP0024787A1 Waveform digitizer
03/11/1981EP0024426A1 Method and apparatus for compensating for drift of the null point of a measuring device.
03/10/1981US4255705 Peak detection and electronic compensation of D. C. saturation magnetization in current transformers used in watt hour meter installations
03/10/1981US4255704 Zero crossing detection and electronic compensation of D. C. saturation magnetization in current transformers used in watthour meter installations
03/10/1981US4255242 Reference electrode IR drop corrector for cathodic and anodic protection systems
03/10/1981CA1097410A1 Commutating autozero amplifier
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