| 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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| 01/30/1990 | US4897773 Inverter output circuit |
| 01/30/1990 | US4897593 Reactive power compensator for electric power system |
| 01/25/1990 | DE3834867C1 Circuit arrangement for the parallel connection of power supply devices |
| 01/25/1990 | DE3823640A1 Circuit arrangement for the simulation of a voltage source |
| 01/24/1990 | CN1006583B Apparatus for suppressing voltage fluctuation |
| 01/23/1990 | US4896092 Voltage regulator for AC single phase and three phase systems |
| 01/23/1990 | US4896091 Electric power converter |
| 01/18/1990 | DE3823963A1 Circuit arrangement for the generation of a constant supply voltage |
| 01/17/1990 | EP0350507A1 Overcurrent detector |
| 01/16/1990 | US4894520 Circuit for controlling power dissipated by an electrical resistance |
| 01/10/1990 | EP0350299A2 Bi-directional DC power controller with fault protection |
| 01/10/1990 | EP0349837A2 An electronic circuit with a protection device against fluctuations in the supply battery voltage |
| 01/10/1990 | CN1038725A Procedure and device for overload and shortcircuit protection of output drivers |
| 01/10/1990 | CN1006418B Switch power supply circuit without interference of high frequency ringing |
| 01/09/1990 | US4893228 High-efficiency programmable power supply |
| 01/09/1990 | US4893070 Domino effect shunt voltage regulator |
| 01/09/1990 | US4893069 Ferroresonant three-phase constant AC voltage transformer arrangement with compensation for unbalanced loads |
| 01/09/1990 | US4893030 Biasing circuit for generating precise currents in an integrated circuit |
| 01/03/1990 | EP0348879A1 Circuit to generate a supply voltage |
| 01/03/1990 | EP0348637A2 Indicator circuit |
| 01/03/1990 | EP0348447A1 Process and device for preventing interference of transients in a buck cell |
| 01/03/1990 | CN1038528A High-precision ac voltage stabilizer |
| 01/03/1990 | CN1038527A Touching welder control device |
| 01/03/1990 | CN1006332B Simplified high-efficient d.c. voltage stabilized power unit |
| 01/02/1990 | US4891562 Hybrid regulator-ballast circuit for high intensity discharge lamps |
| 12/28/1989 | DE3920658A1 Method and device for protecting output drivers against overloading and short circuit |
| 12/27/1989 | EP0267189B1 Monitoring circuit for control means and selective breakaway means in modular supply systems |
| 12/26/1989 | US4890214 Start circuit for adapting a constant current generator to a wide variety of loads |
| 12/26/1989 | US4890073 High frequency generator for use with loads subject to great impedance variations |
| 12/26/1989 | US4890020 Circuit for driving a semiconductor device with protection against transients |
| 12/26/1989 | US4890010 Matched current source serial bus driver |
| 12/20/1989 | CN2049796U Power-saving type multifunction ac voltage stabilizer for domestic electric appliance |
| 12/19/1989 | US4888545 Improved tap switching power supply |
| 12/14/1989 | WO1989011816A1 Battery-operated surface treatment apparatus having a booster function |
| 12/12/1989 | US4887022 Under voltage lockout circuit for switching mode power supply |
| 12/12/1989 | US4886984 Prohibition circuit upon power-on event |
| 12/07/1989 | DE3912283A1 Circuit arrangement for solar cells |
| 12/06/1989 | EP0345192A2 Power supply providing constant D.C. output voltages from variable A.C. input voltages |
| 12/06/1989 | CN2049046U High speed triphase constant current charging power source |
| 12/05/1989 | US4885585 Ramp generator reset circuit |
| 12/05/1989 | CA1263701A1 Power interface circuit with control chip powered from power chip |
| 11/29/1989 | EP0343731A2 Unity-gain current-limiting circuit |
| 11/29/1989 | EP0343536A1 Circuit for controlling the power supply of an electrical load, having a device for detecting a short-circuit of the load |
| 11/29/1989 | EP0343177A1 Digital-to-time converter. |
| 11/28/1989 | US4884161 Integrated circuit voltage regulator with transient protection |
| 11/28/1989 | CA1263439A1 Multiplexing apparatus for phase-control circuits |
| 11/23/1989 | EP0342349A1 Contour-clamped homogeneous electric field generator |
| 11/23/1989 | DE3815979A1 Current supply apparatus |
| 11/21/1989 | US4882782 Safety apparatus for detecting an abnormality of power control element |
| 11/21/1989 | US4882532 Active overvoltage control for inductive load driving |
| 11/16/1989 | WO1989011124A1 Voltage control circuit |
| 11/16/1989 | WO1989011123A1 Current source for a variable load with an inductive component |
| 11/15/1989 | EP0341482A1 Circuit arrangement for determining the overtemperature of a semiconductor element |
| 11/15/1989 | CN2047854U Static reactive power continuous compensation device for low-voltage network |
| 11/14/1989 | US4881023 Hybrid high speed voltage regulator with reduction of miller effect |
| 11/08/1989 | EP0340292A1 Power supply system for segmented loads |
| 11/08/1989 | CN2047408U Reactive power compensated automatic controller |
| 11/08/1989 | CN2047407U Lb double-protective dc voltage-stabilized source |
| 11/07/1989 | US4879505 Temperature and power supply compensation circuit for integrated circuits |
| 11/02/1989 | WO1989010591A1 Output circuit |
| 11/02/1989 | EP0339551A2 Control apparatus of resistance welders and control method thereof |
| 10/31/1989 | US4878185 Digital measuring instrument |
| 10/31/1989 | US4878164 Power supply gradually developing an output voltage when switched on |
| 10/31/1989 | US4878011 Proportional firing circuit |
| 10/31/1989 | US4878009 Voltage source having preset values for source voltage and internal resistance |
| 10/31/1989 | US4878008 Contour-clamped homogeneous electric field generator |
| 10/31/1989 | US4877972 Fault tolerant modular power supply system |
| 10/24/1989 | US4876497 Power factor corrector |
| 10/18/1989 | EP0337747A1 Circuit for producing a constant voltage |
| 10/17/1989 | US4875131 Circuit configuration for monitoring a semiconductor structural element and providing a signal when the temperature exceeds a predetermined level |
| 10/17/1989 | CA1262378A1 Automatic switching apparatus for an electrical appliance |
| 10/10/1989 | US4873480 Coupling network for improving conversion efficiency of photovoltaic power source |
| 10/04/1989 | EP0335626A2 Power supply circuit |
| 10/04/1989 | EP0335460A1 An improved circuit arrangement for detecting cross-over by an alternating voltage of a fixed reference voltage level |
| 10/04/1989 | CN2045510U Isolated dc voltage stabilizing and output device |
| 10/03/1989 | USRE33076 Air flow meter circuit with temperature compensation circuit |
| 10/03/1989 | US4871961 Method of controlling the supply of power to electrical loads with a minimum of switching surges |
| 09/27/1989 | EP0334659A2 Conductivity modulated field effect transistor device |
| 09/27/1989 | CN2045162U Automatic voltage-stabilizing voltage regulator |
| 09/26/1989 | US4870526 Automatic power turn-off apparatus for an electronic apparatus |
| 09/26/1989 | US4870421 Regulating switch for transmitting modules in a phased array radar |
| 09/26/1989 | US4870340 Method of and apparatus for reducing energy consumption |
| 09/26/1989 | CA1261957A1 Redundant power supply system |
| 09/26/1989 | CA1261387A1 High voltage control |
| 09/21/1989 | WO1989008940A1 Process and circuit versions for charging accumulators |
| 09/21/1989 | WO1989008881A1 Electric energy supply |
| 09/21/1989 | WO1989008880A1 Electronic ballast for discharge lamps |
| 09/20/1989 | EP0333563A1 Electric power supply control unit for a charge in an intellegent integrated power circuit |
| 09/20/1989 | EP0333353A2 Dual mode voltage reference circuit and method |
| 09/20/1989 | CN2044747U Current regulating ac power supply with controllable amplitude modulation |
| 09/19/1989 | US4868729 Power supply unit |
| 09/19/1989 | US4868702 Ground circuit apparatus for electronic equipment |
| 09/19/1989 | US4868539 Bi-directional multi-frequency ripple control system |
| 09/19/1989 | US4868486 AC power control apparatus |
| 09/19/1989 | US4868483 Power voltage regulator circuit |
| 09/19/1989 | US4868481 Apparatus and method for balancing electrical currents in a multiple-phase system |
| 09/14/1989 | DE3806982A1 Voltage supply unit |
| 09/13/1989 | CN1035593A Power control circuit with phase controlled signal input |
| 09/12/1989 | US4866399 Noise immune current mirror |
| 09/12/1989 | US4866366 Negative feedback power supply apparatus |