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

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)
01/1989
01/10/1989	US4797599 Power control circuit with phase controlled signal input
01/10/1989	US4797541 Power regulator for a contactless credit card system
01/04/1989	CN2030392U Automatic controller used for reactive compensator
01/03/1989	US4795914 Power supply circuit with backup function
01/03/1989	CA1248174A1 Partial shunt switching limiter for a spacecraft solar-panel or like power-source array
01/03/1989	CA1248172A1 Cycle controlled power converter
12/1988
12/29/1988	WO1988010535A1 Alternating voltage commutator
12/29/1988	WO1988010502A1 Thyristor on-load change-over switch
12/28/1988	CN88218763U Large power high precision ac voltage regulator with hydraulic operating device
12/28/1988	CN88211422U Automatical power factor compensating controller making use of micro-computer
12/28/1988	CN87216804U High voltage and large power continuously adjustable power supplying device capable of supplying constant voltage or constant current
12/27/1988	US4794272 Power regulator utilizing only battery current monitoring
12/21/1988	CN87202544U High reliability and adjustable d.c regulated power supply
12/20/1988	US4792749 Power source voltage detector device incorporated in LSI circuit
12/20/1988	US4792747 Low voltage dropout regulator
12/20/1988	US4792745 Dual transistor output stage
12/20/1988	CA1247194A1 Power supply source control system
12/15/1988	WO1988009965A1 Quantized duty ratio power sharing converters
12/15/1988	WO1988009964A1 Switching ac voltage regulator
12/14/1988	EP0295197A1 Power supply start-up circuit
12/14/1988	EP0294887A2 Driving a semiconductor device
12/14/1988	EP0294882A2 High voltage semiconductor with integrated low voltage circuitry
12/14/1988	CN88205054U Simple student power source
12/13/1988	US4791349 Electric power system
12/07/1988	EP0293569A2 Power control circuit with phase controlled signal input
12/07/1988	EP0113865B1 Semiconductor integrated circuit
12/07/1988	CN88105250A Electronic manostat of a.c. magnetoelectric generator
12/07/1988	CN87103762A Equipartition type power source
12/06/1988	US4789808 Gyrotron device with adjustable pitch factor
12/06/1988	CA1246143A1 Thyristor control pulse generating device for feeding the reactive power inductance adjustment in an electrical network
11/1988
11/30/1988	CN88204220U Autoprotective electric source device for electrophoresis
11/29/1988	US4788452 Switchable DC power supply with increased efficiency for use in large wattage amplifiers
11/24/1988	DE3715886A1 Controllable constant current source
11/23/1988	EP0291530A1 Multiple voltage-pulsed corona charging with a single power supply.
11/22/1988	US4787023 Power supply apparatus
11/22/1988	US4786854 Alternating current voltage regulator using a feedback loop with step filtering
11/22/1988	US4786827 Antisaturation circuit for integrated PNP transistor with intervention characteristic definable according to a preset function
11/22/1988	US4786826 Power interface circuit with control chip powered from power chip
11/17/1988	WO1988004865A3 Digital-to-time converter
11/16/1988	CN87205303U Voltage-stabilized uninterrupted dc power supply
11/15/1988	US4785229 Power control circuit for providing a shutdown signal
11/15/1988	US4785226 Powder supply device with solar cell
11/15/1988	CA1244878A1 Method of, and apparatus for, half-cycle average or r.m.s. load voltage control
11/15/1988	CA1244645A1 Driving circuit for radio frequency dryer
11/09/1988	EP0148260B1 Controlled electric current supply unit
11/08/1988	CA1244517A1 Acceleration power supply
11/02/1988	CN88201089U Auxiliary power supply for hollow cathode lamp with high performance
11/02/1988	CN87214453U Automatic controller for reactive power compensation
11/01/1988	US4782280 Transistor circuit with E/C voltage limiter
10/1988
10/26/1988	EP0288292A2 Electronic control circuit for preventing abnormal operation of a slave control circuit
10/26/1988	EP0288222A2 Lamp-lighting device
10/26/1988	EP0152469B1 Regulated voltage supply with sense current cancellation
10/26/1988	CN87214119U Dc voltage regulator with large dynamic range
10/25/1988	US4780804 Method and an arrangement for enabling the magnetizing current passing through a transformer to be minimized when an asymmetric load is applied to the secondary side of the transformer
10/19/1988	CN88201620U Chain reaction type two port stabilzer
10/19/1988	CN88200820U All-transistor ac regulated power supply
10/18/1988	US4779062 Short circuit current limiter
10/18/1988	US4779037 Dual input low dropout voltage regulator
10/18/1988	US4779036 AC power control apparatus
10/12/1988	CN87213544U Rectifier arc welder with moving strip by-passing
10/06/1988	WO1988007715A1 Voltage regulator
10/05/1988	EP0285199A1 Power supply circuit with two output voltages
10/05/1988	EP0285033A2 Prohibition circuit upon power-on event
10/04/1988	US4775806 Integrated circuit having capacitive process-scatter compensation
10/04/1988	CA1242756A1 Signal generating circuit for reactive energy compensation of an arc furnace
09/1988
09/28/1988	EP0284592A1 Device allowing the restoration of the line courant in case of the burning out of one or several elements of a series arrangement
09/28/1988	EP0284006A1 Reactive power compensation system
09/27/1988	US4774517 Voltage regulator for use in transmitters for radar applications
09/27/1988	US4774451 Voltage controlling transformer circuit and method for generating a controlled load voltage by using such a transformer circuit
09/27/1988	US4774450 Stabilized power-supply circuit connectable with auxiliary electric source without an intermediary blocking diode
09/22/1988	WO1988007130A1 Digitalized hybridizable current-regulating circuit for positive and negative current control circuits
09/21/1988	EP0282577A1 Energy management system.
09/21/1988	CN87217021U Control of dc stabilized voltage supply switch
09/20/1988	US4772804 Process and device for sending electrical current into a circuit using a transistor
09/15/1988	DE3707442A1 Digitalisierte hybridisierbare stromregelschaltung fuer positive und negative steuerstroeme Digitized hybridizable current regulating circuit for positive and negative steuerstroeme
09/13/1988	US4771226 Voltage regulator for low voltage, discharging direct current power source
09/13/1988	US4771225 Device for limiting switching frequency of a parallel capacitor reactive power compensation network
09/08/1988	DE3706264A1 Circuit arrangement for monitoring a power to be delivered at a medical, particularly a dental device
09/07/1988	WO1988006757A1 Preliminary stage of a voltage regulator with low loss of voltage, and voltage regulator with said preliminary stage
09/07/1988	CN87100937A Large-power dc power supply capable of providing constant current and constant voltage
09/06/1988	US4769588 Apparatus and method for providing a current exponentially proportional to voltage and directly proportional to temperature
09/06/1988	US4769555 Multi-time delay power controller apparatus with time delay turn-on and turn-off
09/06/1988	US4769532 Apparatus for adjusting optical sensors with threshold memory
08/1988
08/31/1988	EP0280514A1 Voltage regulator and voltage stabilizer
08/30/1988	US4767979 Switching circuit device using current mirror circuits
08/30/1988	CA1241425A1 Uninterruptible power supply with isolated bypass winding
08/25/1988	WO1988006363A1 Overcurrent detector
08/25/1988	DE3704982A1 Electronic circuit for an intrinsically safe DC supply
08/24/1988	CN87212555U Fully automatic ac stabilizer
08/23/1988	US4766364 Parallel power systems
08/23/1988	US4766363 Voltage limiting control system for heat emitting loads
08/17/1988	EP0278719A2 Solid state current limited power controller for DC circuits
08/17/1988	EP0278635A1 Negative feedback power supply apparatus
08/17/1988	CN87217185U Electronic dc voltage stabilizer
08/16/1988	US4764858 Energy controller
08/16/1988	US4764716 Stabilizing circuit for a microcomputer
08/10/1988	CN87216461U Continuous compensation type precision a.c. stabilizer
08/10/1988	CN87215552U Collector output regulated power supply
08/10/1988	CN87214800U Wbx-type compensation box with low voltage separated capacitors
08/09/1988	CA1240364A1 Device for generating a signal indicative of a fault in an electrical circuit connected to a power mains

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