| 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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| 09/25/1990 | US4959556 Circuit arrangement for deriving a direct voltage from the mains alternating voltage |
| 09/19/1990 | EP0387854A2 Circuit arrangement and device for the contactless setting of a target value for an integrated circuit enveloped by a non-magnetic material |
| 09/19/1990 | EP0387749A2 Holder of slide-in units |
| 09/19/1990 | CN1045463A Subminiature ac voltage stabilizer |
| 09/12/1990 | CN2062074U Voltage compensation a.c. stabilizer |
| 09/12/1990 | CN1045306A Positive and negative bilaterial constant current source |
| 09/12/1990 | CN1045305A Multiple brush contact type automatic ac voltage regulator |
| 09/12/1990 | CN1009596B Method and arrangement for controlling the magnetizing current passing through a transformer |
| 09/11/1990 | US4956599 Power control apparatus |
| 09/07/1990 | WO1990009858A1 Pulse welding apparatus |
| 09/04/1990 | US4954917 Power transistor drive circuit with improved short circuit protection |
| 09/04/1990 | US4954769 CMOS voltage reference and buffer circuit |
| 09/04/1990 | US4954766 Power supply circuit and semiconductor integrated circuit device using it |
| 09/04/1990 | US4954765 Fully automatic phase controller for a non-coil armature type generator |
| 09/04/1990 | US4954686 High speed RMS control apparatus for resistance welders and high speed RMS control method thereof |
| 08/29/1990 | EP0384513A1 Circuit for regulating the base current of a semiconductor power device |
| 08/28/1990 | US4953056 Current detection apparatus for use in electromagnetic actuator drive circuit |
| 08/28/1990 | US4952866 Voltage-to-current converters |
| 08/28/1990 | US4952863 Voltage regulator with power boost system |
| 08/28/1990 | US4952821 Voltage detection circuit and comparison voltage generator therefor |
| 08/22/1990 | EP0223834B1 Digital cathode current control loop |
| 08/22/1990 | CN1009316B High current and low ripple linear stabilized power supply device |
| 08/21/1990 | US4951188 Final stage of a bridge circuit |
| 08/21/1990 | US4951009 Tuning method and control system for automatic matching network |
| 08/21/1990 | US4950976 Current variation reduction for mosfet current sources |
| 08/21/1990 | US4950975 Preliminary stage of a voltage regulator with low loss of voltage, and voltage regulator with said preliminary stage |
| 08/21/1990 | US4950916 Line voltage regulator |
| 08/16/1990 | EP0382307A2 Switching power supply device |
| 08/16/1990 | EP0382217A2 Power source circuit and bridge type measuring device with output compensating circuit utilizing the same |
| 08/16/1990 | DE3904363A1 Voltage regulator |
| 08/15/1990 | CN2060567U Multifunction high efficiency ac/dc voltage-stabilizing power source |
| 08/14/1990 | US4949235 Magnetic amplifier shutdown circuit |
| 08/14/1990 | US4948987 Secondary electric power source produced by current flow through a primary a.c. power circuit |
| 08/09/1990 | WO1990009050A1 Power supply system |
| 08/09/1990 | DE3936627A1 Integrated voltage controller output current increasing circuit - has second current indicator in current adjuster circuit, responsive to threshold adjusting magnitude |
| 08/09/1990 | DE3546614C2 Transformer circuit |
| 08/08/1990 | EP0381094A1 Motor controller having SCR's |
| 08/08/1990 | EP0380606A1 Battery-operated surface treatment apparatus having a booster function. |
| 08/08/1990 | CN2060241U Parallel regulated power supply |
| 08/08/1990 | CN2060240U Super picoampire direct-current signal generator |
| 08/08/1990 | CN2060239U High-power constant-current supply |
| 08/08/1990 | CN2060238U Superminiature alternating-current manostat |
| 08/07/1990 | US4947313 Direct current power supply |
| 08/07/1990 | US4947102 Feedback loop gain compensation for a switched resistor regulator |
| 08/07/1990 | US4947099 Motor controller with optical SCR's |
| 08/07/1990 | US4947087 Lamp-lighting device |
| 08/07/1990 | US4947079 Notch cutting circuit with minimal power dissipation |
| 08/07/1990 | US4947056 MOSFET for producing a constant voltage |
| 08/02/1990 | DE3901560A1 Linear voltage regulator with low power dissipation and a wide input voltage range |
| 08/01/1990 | EP0379696A1 Voltage-boosting converter with a demagnetization energy recuperation coil |
| 07/31/1990 | US4945444 Integratable circuit configuration for reverse current reduction in an inversely operated transistor |
| 07/31/1990 | US4945301 Constant-voltage power supply circuit and amplifier circuit and DA converter using the constant-voltage power supply circuit |
| 07/31/1990 | US4945300 Power source control apparatus |
| 07/31/1990 | US4944281 Circuit for regulating current in an inductive load |
| 07/31/1990 | CA1272263A1 Energy management system |
| 07/31/1990 | CA1272254A1 Automatic control circuitry for a signal power amplifier |
| 07/26/1990 | WO1990008008A1 Power control and line voltage monitor/compensator for resistance spot welding machines |
| 07/25/1990 | EP0379454A1 MOS power transistor circuit controlled by a device with two symmetrical charging pumps |
| 07/25/1990 | EP0379303A1 Light emitting diode array current power supply |
| 07/25/1990 | EP0379092A1 Voltage generating circuit |
| 07/25/1990 | EP0233942B1 Partial shunt switching limiter for a spacecraft solar-panel or like power-source array |
| 07/24/1990 | US4943762 Power supply system |
| 07/24/1990 | US4943737 BICMOS regulator which controls MOS transistor current |
| 07/24/1990 | CA1271982A1 Power control device for a resistance heater in an oven |
| 07/18/1990 | CN1043999A Voltage regulator circuit for free voltage |
| 07/18/1990 | CN1043998A Dynamic current control method of crystal shutter tube shunt |
| 07/17/1990 | US4942347 Motor drive circuit |
| 07/17/1990 | CA1271810A1 Shutdown control means for an electric power supply |
| 07/11/1990 | EP0377537A2 Circuit for providing fast output current control in a current mode switching power supply |
| 07/11/1990 | CN2059255U Automatic voltage adjusting protector with special delay function |
| 07/11/1990 | CN1043807A Ac voltage regulator of automatic switching ranges |
| 07/10/1990 | US4940930 Digitally controlled current source |
| 07/10/1990 | US4940910 Temperature compensated monolithic delay circuit |
| 07/05/1990 | DE3835863A1 Circuit arrangement for dissipating DC supply voltages |
| 07/04/1990 | EP0376665A1 Voltage stabilizer |
| 07/04/1990 | EP0376495A2 Peripheral device power activation circuit and method therefor |
| 07/04/1990 | EP0376383A1 Integrated circuit comprising a switchable current generator |
| 07/04/1990 | CN2059001U Switch type integrated regulated power supply device |
| 07/04/1990 | CN1043591A Reactive power compensation apparatus with improved gate circuit |
| 07/03/1990 | US4939442 Bandgap voltage reference and method with further temperature correction |
| 07/03/1990 | US4939393 ECL to TTL/CMOS translator using a single power supply |
| 07/03/1990 | CA1271221A1 Transistor arrangement |
| 06/27/1990 | EP0375289A2 Electric lighting and power controllers therefor |
| 06/27/1990 | EP0375288A1 Electric lighting and power controllers therefor |
| 06/27/1990 | EP0374641A2 Method to suppress amplitude variations of two alternating, periodic signals in phase quadrature with a random phase sequence, and circuit arrangement to carry out the method |
| 06/27/1990 | EP0374400A2 Arrangement for regulating the current through a load, and method |
| 06/27/1990 | EP0374288A1 Integrated circuit diminishing the inverse current of an inversely polarized transistor |
| 06/26/1990 | US4937721 Cancellation of regulator output filter poles by second derivative feedback |
| 06/26/1990 | CA1270900A1 Constant current circuits |
| 06/21/1990 | DE3941055A1 Low-ripple regulated current supply circuit for magnetron - derives smoother output current from rectification of negative-going half-cycles of three=phase mains voltage |
| 06/20/1990 | EP0373601A2 Reactive power compensation apparatus with improved gate circuit |
| 06/20/1990 | CN2058508U Arc-stabilizing device of multifunctional ac arc welder |
| 06/19/1990 | US4935691 Phase switched power controller |
| 06/19/1990 | US4935641 Power control circuit |
| 06/19/1990 | CA1270521A1 Voltage control system |
| 06/14/1990 | WO1990006547A1 Voltage transducer |
| 06/14/1990 | WO1990006403A1 A linkage system for loading machines |
| 06/13/1990 | EP0372956A1 Constant current source circuit |
| 06/13/1990 | EP0372109A1 Reactive power controller |
| 06/13/1990 | EP0210192B1 Installation for the filtering and transitory stabilization of mains voltage |