| Patents for G05F 1 - Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems (37,749) |
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| 01/08/1991 | US4983905 Constant voltage source circuit |
| 01/03/1991 | DE3920884A1 Voltage controlled bipolar current source - has output node driven from current source and current sink for difference output |
| 01/03/1991 | DE3920805A1 Short circuit protected driver stage - has monitoring circuit in front of power transistor for latter blocking at high consumer current, or short circuit |
| 01/02/1991 | EP0406009A2 An adaptable current regulating system |
| 01/02/1991 | EP0405783A2 Burst mode transmitter/receiver unit |
| 01/02/1991 | CN2068698U Adjustable miniature electric welder |
| 01/02/1991 | CN2068697U Current monitor for a.c low voltage circuit |
| 01/02/1991 | CN1011072B Automatic tester for temp. rise of electric appliances |
| 01/01/1991 | US4982149 Electric supply apparatus having means for correcting supply voltage fluctuations |
| 12/31/1990 | WO1991000564A1 Power supply and oscillator for a computer system providing automatic selection of supply voltage and frequency |
| 12/29/1990 | CA2019266A1 Burst mode transmitter/receiver unit |
| 12/27/1990 | EP0404400A2 Voltage and current limiting power supply |
| 12/27/1990 | EP0404220A1 Device for protection against overvoltages of integrated electronic circuits, particularly for applications in the motor car field |
| 12/27/1990 | EP0403942A2 Low dropout voltage regulator with low common current |
| 12/27/1990 | EP0238509B1 Solenoid driver control unit |
| 12/27/1990 | CA1278341C Transistor base current regulator |
| 12/26/1990 | CN1048128A Measuring circuit of system separation for disperse disposition type of power source |
| 12/26/1990 | CN1048122A Internal voltage transducer of semiconductor integrated circuit |
| 12/25/1990 | US4980810 VHF DC-DC power supply operating at frequencies greater than 50 MHz |
| 12/20/1990 | DE4006306A1 Innerer spannungswandler in einer integrierten halbleiterschaltung Internal voltage converter in an integrated semiconductor circuit |
| 12/19/1990 | EP0403413A1 Procedure and device for measuring the instability of an arc in an electric furnace for the treatment of liquid metals |
| 12/18/1990 | US4979067 Voltage and current limiting power supply |
| 12/18/1990 | US4979066 Loading controlling apparatus |
| 12/18/1990 | US4978829 Electric discharge machining power supply circuit |
| 12/18/1990 | CA1278038C Power converter apparatus for a dc power transmission system or a frequency conversion system |
| 12/15/1990 | CA2019008A1 Process and apparatus for measuring the instability of an arc in an electric furnace used for molten metal treatment |
| 12/12/1990 | EP0401448A1 Stabilized power supply with very high efficiency through switching series regulation |
| 12/12/1990 | EP0401442A1 Apparatus for automatic control of power factor of inductive load |
| 12/12/1990 | CN2067425U Safety precision unintermittent dc power supply |
| 12/12/1990 | CN1010822B Single chip microprocessor wattless power controller |
| 12/11/1990 | US4977374 Radiation hardened magnetic voltage and/or current reference produced by a saturable, two core transformer with first harmonic nulling |
| 12/04/1990 | US4975630 Constant power supply unit of electric heating apparatus |
| 11/29/1990 | WO1990014625A1 Power source circuit |
| 11/28/1990 | EP0399561A2 VHF DC-DC power supply |
| 11/28/1990 | EP0398943A1 Shunt regulator. |
| 11/28/1990 | EP0398897A1 Voltage transducer |
| 11/28/1990 | CN1047422A Autosynchronous compensater for electric power system of oil field |
| 11/28/1990 | CN1047404A Ac voltage-stabilized source with fast compensation |
| 11/27/1990 | US4973174 Parameter-free synthesis of zero-impedance converter |
| 11/22/1990 | EP0398026A2 Semiconductor AC switch |
| 11/22/1990 | EP0397932A1 Control device for active filter |
| 11/22/1990 | EP0397913A1 Rectifying device |
| 11/21/1990 | CN2066165U Frequency modulation bandwidth-adjusting switch regulated power supply |
| 11/21/1990 | CN2066164U Domestic automatic alternating current manostat |
| 11/20/1990 | US4972136 Linear power regulator with current limiting and thermal shutdown and recycle |
| 11/15/1990 | WO1990013938A1 A voltage step up regulator |
| 11/15/1990 | DE3932399C1 Operating series length regulating loop - switching in adjuster again during delay time if current falls again below threshold value |
| 11/14/1990 | EP0397102A2 Power delivery circuit with current sensing |
| 11/14/1990 | EP0397017A2 Device for protecting semiconductor circuits against transients on the supply line |
| 11/14/1990 | EP0396996A2 Bandgap threshold circuit with hysteresis |
| 11/14/1990 | EP0396791A1 Procedure and apparatus for the regulation of voltage in a flasher |
| 11/14/1990 | EP0252095B1 D.c. motor control system |
| 11/14/1990 | CN2065776U Synchronous switching all-automatic voltage stabilizer |
| 11/13/1990 | US4970623 Peripheral device power activation circuit and method therefor |
| 11/13/1990 | US4970452 Integrated circuit comprising a switchable current generator |
| 11/13/1990 | US4969229 Battery-operated surface treatment apparatus having a booster function |
| 11/08/1990 | DE3923630A1 Stromquellen-spannungsnachfuehrschaltkreis zur stabilisierung von bitleitungen Current source spannungsnachfuehrschaltkreis for stabilization of bit lines |
| 11/08/1990 | DE3914287A1 DC voltage converter for vehicle voltage supply system - has FET controlled by regulating stages to provide stabilised output voltage |
| 11/07/1990 | EP0396126A2 Power supply device |
| 11/07/1990 | CN1010360B Control apparatus for ac-dc converter |
| 11/06/1990 | US4969080 A method of decoupling a three-phase converter |
| 11/06/1990 | US4969076 Load compensating gain control for a series resonant inverter |
| 11/06/1990 | US4968928 Method and arrangement for suppressing noise signals in a load supplied with direct voltage by a final controller |
| 11/06/1990 | US4968927 Device for regulating delivery of ac power |
| 11/06/1990 | US4968106 High voltage generating apparatus for television equipment |
| 10/31/1990 | CN2064910U Autoformer type ac voltage-stabilizing device |
| 10/24/1990 | EP0393847A1 Method and apparatus for inductive load control with current simulation |
| 10/24/1990 | CN1046421A Improvements in gate pulse generator for static var compensator |
| 10/23/1990 | US4965508 Power supply circuit having controllable thyristor network and adjustable voltage regulator |
| 10/23/1990 | US4965469 Input circuit operable under different source voltages in semiconductor integrated circuit |
| 10/18/1990 | WO1990012352A1 Fault-powered power supply |
| 10/17/1990 | EP0392831A2 Power transistor drive circuit with improved short circuit protection |
| 10/17/1990 | EP0392614A1 Voltage-regulating circuit |
| 10/17/1990 | EP0392458A2 Improvements in gate pulse generator for static var compensator |
| 10/17/1990 | EP0392419A1 Regulation device for one electrical parameter during energy transfer between two networks |
| 10/17/1990 | CN1010069B Dc to dc converter |
| 10/17/1990 | CA2010794A1 Method and apparatus for inductive load control with current simulation |
| 10/16/1990 | US4963814 Regulated bifurcated power supply |
| 10/16/1990 | US4963715 Variable polarity power supply for welding |
| 10/14/1990 | CA2014381A1 Device for regulating an electrical parameter during energy transfers between two networks |
| 10/10/1990 | CN1009982B Uninterruptible power supply with isolated bypass winding |
| 10/09/1990 | US4962354 Superconductive voltage stabilizer |
| 10/09/1990 | US4962350 Load condition detecting and driving system |
| 10/09/1990 | US4962341 Low voltage non-saturating logic circuit technology |
| 10/04/1990 | WO1990011634A1 Process and device for corona treatment of workpieces |
| 10/04/1990 | DE3910405A1 Circuit arrangement for controlling electrical power |
| 10/03/1990 | EP0389832A1 An electronic circuit for measuring and controlling an electric current flowing through an inductive electric load |
| 10/03/1990 | CN2063251U Protector for household electric appliances |
| 10/03/1990 | CN1009870B Chopper d.c. voltage stabilizer |
| 10/02/1990 | US4961047 Electrical power control apparatus and methods |
| 10/02/1990 | US4961045 Floating output digital to analog converter |
| 10/02/1990 | US4961009 Current-voltage converting circuit utilizing CMOS-type transistor |
| 10/02/1990 | US4961008 Power reduction during power down |
| 09/30/1990 | CA2012020A1 Fault-powered power supply |
| 09/27/1990 | DE3909761A1 Verfahren und vorrichtung zur corona-behandlung von werkstuecken Method and device for corona treatment of workpieces |
| 09/27/1990 | DE3909141A1 Circuit arrangement for operating an electromagnetic load |
| 09/26/1990 | EP0388802A2 Error amplifier for use with parallel operated autonomous current or voltage regulators using transconductance type power amplifiers |
| 09/26/1990 | CN2062872U Self-protection adjustor for car electric generator with silicon rectifier |
| 09/26/1990 | CN2062871U Ac voltage stabilizer |
| 09/25/1990 | US4959558 Circuit arrangement for detecting cross-over by an alternating voltage of a fixed reference voltage level |