| 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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| 06/13/1990 | CN2058257U Transistor a.c voltage slabilizer |
| 06/13/1990 | CN2058256U Regulator of compression pump |
| 06/12/1990 | US4933825 Power supply |
| 06/12/1990 | US4933625 Driving circuit for controlling output voltage to be applied to a load in accordance with load resistance |
| 06/12/1990 | US4933624 Electric power supply with controllable voltage boost |
| 06/12/1990 | US4933572 Dual mode voltage reference circuit and method |
| 06/07/1990 | DE3931893A1 Fold back-type current limit circuit - has series transistor with operational amplifier and transistor drive, and third transistor feed-forward |
| 06/06/1990 | CN2058021U High voltage, large capacity ac voltage-stabilizing device |
| 06/06/1990 | CN1042782A Capacitance-type switch voltage-stabilizing method |
| 06/05/1990 | US4931920 Circuit and method for regulating output voltage of a switch mode power supply having a current mode magnetic amplifier |
| 06/05/1990 | US4931918 Ringing choke converter |
| 06/05/1990 | US4931707 Impedance matching circuit |
| 05/31/1990 | WO1990006040A1 Arc lamp stabilization |
| 05/30/1990 | CN2057769U Industry electric furnace constant power controller |
| 05/29/1990 | US4930112 Semiconductor device having a voltage limiter |
| 05/29/1990 | US4930063 Variable resonance regulator for power supply |
| 05/29/1990 | US4929884 For controlling a load in an electrical system |
| 05/23/1990 | EP0369782A2 Drive circuit for operating an appliance such as a printer |
| 05/23/1990 | EP0369635A2 Power supplies |
| 05/23/1990 | EP0369021A1 Output circuit |
| 05/22/1990 | US4928219 Adaptable current regulating system |
| 05/22/1990 | US4928056 Stabilized low dropout voltage regulator circuit |
| 05/22/1990 | US4928055 Control circuit for heat fixing device for use in an image forming apparatus |
| 05/17/1990 | WO1990005330A1 Current regulator |
| 05/16/1990 | EP0368532A2 Electrical power control apparatus and methods |
| 05/16/1990 | CN1008037B Inverse current transformer system common to a.c. and d.c inputs |
| 05/15/1990 | US4926288 Over-current protection circuit |
| 05/15/1990 | US4926109 Low dropout voltage regulator with low common current |
| 05/10/1990 | DE3837933A1 Pulsed power supply device |
| 05/10/1990 | CA2001637A1 Electrical power control apparatus and methods |
| 05/09/1990 | EP0366940A2 Current supply system with power sharing |
| 05/09/1990 | CN2057010U Universal ac/dc regulated power supply |
| 05/09/1990 | CN1007948B Idle compensating control for electric power system |
| 05/08/1990 | CA1268812A1 Power supply for a three-phase plasma heating unit |
| 05/03/1990 | WO1990004822A1 Computer element performance enhancer |
| 05/03/1990 | DE3836633A1 Einrichtung zur schweissbogenzuendung und -stabilisierung Means for schweissbogenzuendung and stabilization |
| 05/02/1990 | EP0366314A1 Single MAG AMP control system for regulating bipolar voltage output of a power converter |
| 05/02/1990 | EP0366253A1 Noise immune current mirror circuit |
| 05/01/1990 | CA1268519A1 Power supply adapter systems |
| 04/26/1990 | DE3935564A1 Geraet zum parallelen betreiben von nichtunterbrechbaren dreiport-leistungsversorgungseinrichtungen Geraet for parallel run of three uninterruptible power port-care facilities |
| 04/25/1990 | EP0364502A1 Electric energy supply |
| 04/25/1990 | CN2056524U A.c voltage-stabilizer for liner type automative voltage regulation |
| 04/25/1990 | CN2056523U New type alternating current voltage-stabilizer |
| 04/24/1990 | US4920309 Error amplifier for use with parallel operated autonomous current or voltage regulators using transconductance type power amplifiers |
| 04/18/1990 | EP0363602A1 Method for suppressing interference signals befalling on a regulated DC-powered consumer, and arrangement and use |
| 04/18/1990 | CN2056260U Programmable ac automatic pressure-regulating interface controller |
| 04/18/1990 | CN2056259U Regulated ac power supply |
| 04/11/1990 | CN2055954U Single phase silicon controlled type argon arc welder dedicated for small current |
| 04/11/1990 | CN1041229A Dc voltage regulator for colour tv |
| 04/10/1990 | US4916590 Series resonant magnetic amplifier power supply |
| 04/10/1990 | US4916389 Semiconductor integrated circuit with voltage limiter having different output ranges from normal operation and performing of aging tests |
| 04/10/1990 | US4916382 System for maximizing efficiency of power transfer |
| 04/10/1990 | US4916381 Current source for a variable load with an inductive component |
| 04/10/1990 | US4916329 Uninterruptible power supply |
| 04/10/1990 | CA1267686A1 Load control circuit |
| 04/05/1990 | WO1990003680A1 Method and apparatus for controlling a power converter |
| 04/04/1990 | CN2055614U Switch voltage stablizer for colour tv |
| 04/04/1990 | CN1041078A Power control circuit for inductive loads |
| 04/04/1990 | CN1041072A Notch cutting circuit with minimal power dissipation |
| 04/03/1990 | US4914440 Adjustable current source and digital/analog converter with autocalibration using such a source |
| 04/03/1990 | US4914375 Saturable reactor apparatus for automatic control of power factor of inductive load |
| 04/03/1990 | US4914357 Temperature compensated foldback current limiting |
| 04/03/1990 | US4914312 Pulsed power supply for determining breakdown voltage |
| 03/29/1990 | DE3832235A1 Controllable alternating current source having sine-wave current for gas-discharge gaps |
| 03/28/1990 | CN2055266U New step-by-step ac voltage regulator |
| 03/22/1990 | DE3926352A1 Current supply circuit for electric consumer appliance - has bipolar transistor emitter-collector path in current feed track and PTC conductor in resistance branch |
| 03/21/1990 | EP0359217A2 Linear power control for ultrasonic probe with tuned reactance |
| 03/20/1990 | USRE33184 Power controller circuit with automatic correction for phase lag between voltage and current |
| 03/14/1990 | EP0357815A1 Switchable constant current source for I2L gates |
| 03/14/1990 | CN1040445A Microcomputer-controlled large-power ac current regulator |
| 03/14/1990 | CN1007204B Auto-adjuster for electric arc furnace controled by microprocessor |
| 03/13/1990 | US4908753 High-tension power supply for an image recorder |
| 03/13/1990 | US4908566 Voltage regulator having staggered pole-zero compensation network |
| 03/08/1990 | WO1990002476A1 Power control circuit for inductive loads |
| 03/08/1990 | WO1990002474A1 Notch cutting circuit with minimal power dissipation |
| 03/08/1990 | WO1990002443A1 A switchable dc power supply with increased efficiency for use in large wattage amplifiers |
| 03/07/1990 | EP0356516A1 Device for applying galvanic coatings |
| 03/06/1990 | US4906915 Voltage to absolute value current converter |
| 03/06/1990 | US4906914 Intermediate potential generation circuit for generating a potential intermediate between a power source potential and ground potential |
| 03/06/1990 | US4906913 Low dropout voltage regulator with quiescent current reduction |
| 03/06/1990 | US4906860 Control device for active filter |
| 03/06/1990 | US4906859 Power supply circuit with symmetrically tapped auto-transformer |
| 03/01/1990 | DE3829251A1 DC voltage supply having stepped fast interruption |
| 02/28/1990 | EP0355906A1 Voltage-to-current converters |
| 02/21/1990 | CN1039937A Arrangement for controlling phase of thyristor |
| 02/20/1990 | US4903184 Reactive power controller |
| 02/20/1990 | US4902940 Current control circuit |
| 02/14/1990 | CN2052977U Computer controlled power factor compensater |
| 02/14/1990 | CN1039665A Bidirectional dc power controller with fault protection |
| 02/13/1990 | US4901219 For a load center distributing electrical power |
| 02/13/1990 | US4901215 Isolated switch mode power supply controller |
| 02/13/1990 | US4901002 Current source having a wide range of output voltages |
| 02/07/1990 | EP0354098A1 Circuit to control the variation of power with several power transistors in parallel |
| 02/06/1990 | US4899269 System for regulating the operating point of a direct current power supply |
| 02/06/1990 | US4899152 Method and apparatus for temperature compensating a digital to analog converter |
| 02/06/1990 | US4899098 Low voltage drop series regulator with overvoltage and overcurrent protection |
| 02/06/1990 | US4899088 Power control circuit for inductive loads |
| 02/06/1990 | CA1265577A1 Electrical control system and driver |
| 01/31/1990 | CN2052132U Electromagnetic ac constant current power supply |
| 01/31/1990 | CN2052131U Precision ac voltage autostabilization system with great power |