| 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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| 09/12/1989 | US4866295 Power supply control systems |
| 09/08/1989 | WO1989008157A1 Device for applying galvanic coatings |
| 09/06/1989 | EP0331253A1 Current source with a wide range of output voltages |
| 09/06/1989 | EP0331172A2 Reference generator |
| 09/05/1989 | US4864487 Control for three terminal power semiconductor devices |
| 09/05/1989 | US4864216 Light emitting diode array current power supply |
| 08/30/1989 | EP0329988A2 High frequency power generator |
| 08/30/1989 | CN1035056A Device and method for assisting addiction treatment |
| 08/29/1989 | US4862059 Ferroresonant constant AC voltage transformer |
| 08/29/1989 | US4862058 Voltage regulator |
| 08/29/1989 | US4862057 Cycle-controlled power converter |
| 08/29/1989 | US4862056 Interface for an electrical device |
| 08/29/1989 | US4862015 Constant propagation delay current reference |
| 08/24/1989 | WO1989007853A1 Active filter |
| 08/24/1989 | DE3804074A1 Aktives filter Active filter |
| 08/23/1989 | EP0328525A1 System enabling the electrical balancing of transducers arranged in inking heads. |
| 08/23/1989 | EP0207086B1 Circuit for monitoring the electric current supply of a consumer |
| 08/23/1989 | CN2043390U Automatic controller for manostat |
| 08/23/1989 | CN2043389U Low-power loss high-reliability voltage stabilizer |
| 08/23/1989 | CN2043388U Remote-control current-regulating power-saving device for ac electric welder |
| 08/23/1989 | CN1035011A Computerized power-factor compensation method and device |
| 08/22/1989 | US4860188 Redundant power supply control |
| 08/22/1989 | US4859926 Power controller for heater load |
| 08/16/1989 | EP0328109A1 High voltage generator |
| 08/15/1989 | US4857827 Electronic load for testing transformers |
| 08/15/1989 | US4857821 Reactive power compensation system |
| 08/15/1989 | US4857756 Power control unit for a computer system |
| 08/10/1989 | WO1989007295A1 Shunt regulator |
| 08/09/1989 | EP0327512A1 Power supply gradually developing an output voltage when switched on |
| 08/09/1989 | EP0327174A1 Circuit arrangement for deriving a direct voltage from the mains alternating voltage |
| 08/09/1989 | EP0326968A1 A driving circuit having an electrical characteristics variable in response to its load resistance |
| 08/09/1989 | CN2042611U Rectifler for coal mine hauling |
| 08/08/1989 | US4855892 Power supply for plasma display |
| 08/03/1989 | DE3802677A1 Method for improving the operating behaviour of dynamic power-factor correction installations having a limited power control capability |
| 08/02/1989 | EP0326489A1 Working point regulation system of a DC power supply |
| 08/02/1989 | EP0326009A1 Ground circuit apparatus for electronic equipment |
| 08/02/1989 | CN2042215U Automatically started and stopped automatic voltage regulator |
| 07/26/1989 | EP0325301A2 Power control apparatus |
| 07/26/1989 | EP0325147A2 Circuit arrangement for a voltage-controlled constant voltage source with an input side RC network |
| 07/25/1989 | US4851953 Low voltage current limit loop |
| 07/25/1989 | US4851759 Unity-gain current-limiting circuit |
| 07/25/1989 | CA1257901A1 Control of ac power for inductive loads |
| 07/20/1989 | DE3806968A1 Method and circuit arrangement for generating a regulated compensating voltage from a higher input DC |
| 07/19/1989 | CN2041438U Large power single-phase ac source stablizer |
| 07/19/1989 | CN2041437U Constant current frequency converter |
| 07/18/1989 | US4849874 Single mag amp control system for regulating bipolar voltage output of a power converter |
| 07/18/1989 | US4849683 Lamp driver circuit with controlled power over a range of power supply voltages |
| 07/18/1989 | US4848876 Electronic control circuit for preventing abnormal operation of a slave control circuit |
| 07/12/1989 | EP0323813A1 A device for the thermal protection of an integrated electronic power circuit |
| 07/11/1989 | US4847781 Energy management system |
| 07/11/1989 | US4847548 Signal conditioner for a linear variable differential transformer |
| 07/11/1989 | US4847546 Solar panel output enhancement circuit |
| 07/11/1989 | US4847545 Method and an apparatus for boosting battery |
| 07/11/1989 | CA1257328A1 Current source with adjustable temperature coefficient |
| 07/05/1989 | EP0323170A2 A regulating switch for transmitting modules in a phased array radar |
| 07/05/1989 | CN1033718A Idle compensating control for electric power system |
| 07/04/1989 | US4845584 Transistor protective circuit |
| 07/04/1989 | CA1257027A1 Compensation circuit for use with an integrating amplifier |
| 07/04/1989 | CA1256942A1 Circuit arrangement for feeding an electrical load from a solar generator |
| 06/29/1989 | WO1989005982A1 Power failure detector circuit |
| 06/28/1989 | EP0321565A1 Alternating voltage commutator |
| 06/27/1989 | US4843265 Temperature compensated monolithic delay circuit |
| 06/27/1989 | US4843257 Regulated power supply for MOS Transistors with short channel length |
| 06/27/1989 | CA1256490A1 Static var generator system having improved response time |
| 06/22/1989 | DE3741784A1 Circuit arrangement for overload protection of stabilisation circuits in rectifier arrangements |
| 06/21/1989 | EP0321226A1 Intermediate potential generation circuit for generating a potential intermediate between a power source potential and ground potential |
| 06/21/1989 | EP0282577A4 Energy management system. |
| 06/21/1989 | CN2039886U Ac bridge anti-jamming power supply |
| 06/20/1989 | US4841219 Lossless overcurrent sensing circuit for voltage regulator |
| 06/20/1989 | US4841161 Monitoring circuit for control means and selective breakaway means in modular supply systems |
| 06/15/1989 | DE3740733A1 Circuit arrangement for limiting an operating voltage for electrical consumers, particularly in motor vehicles |
| 06/14/1989 | CN1033417A Automatic tester for temperature rise of electric appliances |
| 06/07/1989 | EP0319107A2 Current control circuit |
| 06/07/1989 | EP0319011A1 High voltage generating apparatus for television equipment |
| 06/07/1989 | CN1033325A Ac voltage stabilizer |
| 06/07/1989 | CN1004462B Source apparatus of driving and controlling the three-end controlled electric valve |
| 05/31/1989 | CN2038646U Integrated power supply for providing regulated dc voltage |
| 05/31/1989 | CN2038645U Ac. voltage stabilizer |
| 05/30/1989 | US4835668 Power supply with two output voltages |
| 05/30/1989 | US4835652 Bi-directional DC power controller with fault protection |
| 05/30/1989 | US4835649 Self-latching current limiter |
| 05/30/1989 | US4835534 Monitoring a conflict detector for traffic-lights |
| 05/30/1989 | US4835411 Active filter unit |
| 05/30/1989 | US4834504 LCD compensation for non-optimum voltage conditions |
| 05/24/1989 | EP0317538A1 Hose clamp |
| 05/24/1989 | EP0316804A1 Reactive power controller |
| 05/24/1989 | EP0316781A1 Dual input low dropout voltage regulator |
| 05/23/1989 | US4833628 Up to speed detector for an electric motor using measured values of the current lag; and voltage ramp controller using the up to speed indication |
| 05/23/1989 | US4833341 Semiconductor device with power supply voltage converter circuit |
| 05/23/1989 | US4833339 Load control system |
| 05/23/1989 | US4833338 Ferroresonant regulator for inductively coupled power distribution system |
| 05/23/1989 | CA1254635A1 Switching control apparatus for vending machine alternating current device switching |
| 05/18/1989 | WO1989004562A1 Power supply system for segmented loads |
| 05/10/1989 | EP0315366A2 A regulated dc power supply having master and slave regulators |
| 05/10/1989 | EP0314882A1 Digital slip frequency generator and method for determining the desired slip frequency |
| 05/10/1989 | EP0314681A1 Final stage of a bridge circuit. |
| 05/09/1989 | US4829159 Method of optimizing control of plural switched electric loads to reduce switching transients |
| 05/09/1989 | CA1253928A1 Control device for controllable electric valve |
| 05/03/1989 | EP0314386A2 A power supply |
| 05/03/1989 | EP0314227A2 Wideband single-ended voltage-to current converter and gain-control circuit |