| 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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| 08/22/1991 | WO1991012651A1 Energy converter |
| 08/22/1991 | WO1991012574A1 Current conveyor |
| 08/22/1991 | WO1991012573A1 Frequency response-compensated circuit |
| 08/21/1991 | EP0441805A1 Current regulator. |
| 08/20/1991 | US5041777 Voltage controlled and current limited power supply |
| 08/20/1991 | US5041747 Delay regulation circuit |
| 08/14/1991 | DE4004135A1 Frequenzgangkompensierte schaltung Frequency-response-compensated circuit |
| 08/14/1991 | CN2082872U Antijamming voltage stabilized and regulated ac power supply |
| 08/13/1991 | US5039934 Control for voltage/current source with current/voltage limiting |
| 08/08/1991 | DE4019637C1 Current supply circuit for LF amplifier of radio receiver - has two rectifying circuits for two sec. windings of mains transformer combinable by switch for higher output power |
| 08/07/1991 | CN2082434U Alternating-current voltage-stabilising auto-transformer |
| 08/06/1991 | US5038266 High efficiency, regulated DC supply |
| 08/06/1991 | US5038265 Power supply with multiple outputs and load balancing |
| 08/06/1991 | US5038247 Method and apparatus for inductive load control with current simulation |
| 08/06/1991 | US5038090 Servo motor control apparatus |
| 08/06/1991 | US5038081 Reverse phase-controlled dimmer |
| 07/31/1991 | EP0439230A2 Active bypass for inhibiting high-frequency supply voltage variations in integrated circuits |
| 07/31/1991 | CN2081994U Safety a.c. voltage regulator |
| 07/30/1991 | US5036269 Voltage stabilizer with a very low voltage drop designed to withstand high voltage transients |
| 07/30/1991 | US5036181 Method and apparatus for supplying and controlling power to a resistance furnace |
| 07/25/1991 | WO1991010950A1 Process and device for the electrical power supply of a magnetron |
| 07/24/1991 | EP0438323A1 Multi-output DC-DC converter |
| 07/24/1991 | CN2081549U Fully-automatic non-contact alternating-current power supply manostat |
| 07/23/1991 | US5034964 N:1 time-voltage matrix encoded I/O transmission system |
| 07/23/1991 | US5034676 Direct current power supply circuit having automatic linear and switching modes |
| 07/17/1991 | EP0436980A1 Power supply with improved power factor correction |
| 07/17/1991 | EP0436627A1 Method and apparatus for controlling a power converter. |
| 07/16/1991 | US5032738 Scheme for rapid adjustment of network impedance |
| 07/16/1991 | CA1286359C Control apparatus for ac-dc converter |
| 07/11/1991 | DE4100272A1 Oscillator current supply for portable data appts. - delivers energy to primary coil with electromagnetically coupled detector coil for load change pick=up |
| 07/10/1991 | EP0436324A2 Power monitoring circuit |
| 07/10/1991 | EP0262181B1 Power regulator for a contactless credit card system |
| 07/09/1991 | US5030922 Supply current compensation circuitry |
| 07/04/1991 | DE4037823A1 Working current generating circuit - has current determined by resistor in series with transistor emitter-collector path |
| 07/04/1991 | DE3943027A1 Saturation controllable choke coil with rectifier - has extra potential source coupled to adjuster for its control with rectifier blocked |
| 07/03/1991 | EP0435371A2 Power supply device with non-symmetric monitoring |
| 07/03/1991 | EP0435258A2 Multi-level selecting circuit |
| 07/03/1991 | EP0434841A1 Power source circuit |
| 07/03/1991 | CN2080275U Switch voltage-stabilizing power source for new type power saving black and white tv set |
| 07/03/1991 | CN2080191U Automatic control instrument without power compensation |
| 07/03/1991 | CN2080190U Fully automatic digit power factor compensation instrument |
| 07/03/1991 | CN2080189U Ac voltage stabilizer |
| 07/02/1991 | US5029062 Electrical regulation and energy transfer circuit |
| 06/27/1991 | WO1991009411A1 Variable power drive circuit |
| 06/26/1991 | EP0433966A1 Method and circuiting for driving a plurality of triacs |
| 06/26/1991 | EP0433724A2 Voltage regulator with power boost system |
| 06/26/1991 | EP0433416A1 Device with a multiplicity of independent, identical oscillators operating synchronously |
| 06/26/1991 | CN2079773U Ac voltage regulator |
| 06/26/1991 | CN1052585A Direct-arc electric furnace fed with controlled current and method to feed direct-arc furnace with controlled current |
| 06/25/1991 | US5027250 Electronic circuit with a protection device against fluctuations in the supply battery voltage |
| 06/25/1991 | US5027053 Low power VCC /2 generator |
| 06/25/1991 | US5027051 Photovoltaic source switching regulator with maximum power transfer efficiency without voltage change |
| 06/25/1991 | US5027004 Circuit for regulating the base current of a semiconductor power device |
| 06/25/1991 | US5027002 Redundant power bus arrangement for electronic circuits |
| 06/25/1991 | CA1285322C Digital measuring instrument |
| 06/23/1991 | CA2032917A1 Method and circuit for gating plural triacs |
| 06/20/1991 | DE4039874A1 Line filter for damping symmetrical interference - reduces interference on mains supply lines by using specified series inductors and shunt capacitors across current, neutral and earth lines |
| 06/19/1991 | EP0433144A1 Switch mode AC-DC power supply |
| 06/19/1991 | EP0432754A2 Circuit arrangement of a power supply |
| 06/19/1991 | CN2079322U C type iron core antomatic adjustable voltage stabilizer |
| 06/19/1991 | CN2079321U Nulti-function voltage stabilizing and adjustable power source |
| 06/18/1991 | US5025204 Current mirror using resistor ratios in CMOS process |
| 06/18/1991 | US5025203 Circuit for use with a voltage regulator |
| 06/18/1991 | US5025202 Solar cell power system with a solar array bus lockup cancelling mechanism |
| 06/18/1991 | US5024101 Power source circuit and bridge type measuring device with output compensating circuit utilizing the same |
| 06/16/1991 | WO1991009360A1 Regulated bifurcated power supply |
| 06/13/1991 | WO1991008078A1 Power supply circuit for electric discharge machine |
| 06/12/1991 | EP0431063A1 Notch cutting circuit with minimal power dissipation |
| 06/12/1991 | EP0431048A1 Power control circuit for inductive loads |
| 06/12/1991 | EP0328525B1 System enabling the electrical balancing of transducers arranged in inking heads |
| 06/11/1991 | US5023768 High voltage high power DC power supply |
| 06/11/1991 | US5023543 Temperature compensated voltage regulator and reference circuit |
| 06/11/1991 | US5023541 Power supply control circuit having constant voltage and constant current modes |
| 06/11/1991 | US5023476 Semiconductor device with power supply mode-change controller for reliability testing |
| 06/11/1991 | CA1284826C Digital timing signal generator and voltage regulator circuit |
| 06/05/1991 | EP0211866B1 Integrated circuit having a variably boosted node |
| 06/05/1991 | CN1051990A Circuit structure with annex current for earthed user supply |
| 06/04/1991 | US5021730 Voltage to current converter with extended dynamic range |
| 06/04/1991 | US5021729 Differential current source |
| 06/04/1991 | US5021728 Power source apparatus for electronic equipment |
| 06/04/1991 | US5021679 Power supply and oscillator for a computer system providing automatic selection of supply voltage and frequency |
| 05/30/1991 | WO1991007713A1 Transducer power supply |
| 05/29/1991 | CN2078020U Electronic controlled device of electric power of electromagnet |
| 05/29/1991 | CN1051797A Tapped switching circuit of silicon-controlled inductive device gated via photoelectric coupling |
| 05/29/1991 | CN1012663B Device and method for assisting addiction treatment |
| 05/25/1991 | CA2030582A1 High voltage high power dc power supply |
| 05/22/1991 | EP0428315A2 Circuit & method for regulating the current flow in a distributorless ignition system coil |
| 05/22/1991 | CN2077561U A.c manostat |
| 05/21/1991 | US5017858 Constant-current regulated power circuit |
| 05/16/1991 | WO1991007056A1 Process and device for activating a chip card |
| 05/15/1991 | EP0427709A2 Power control circuit |
| 05/15/1991 | CN1051439A Transistor stabilized switch rectifying circuit |
| 05/15/1991 | CN1051438A Source voltage control circuit |
| 05/14/1991 | CA1284178C Switching ac voltage regulators |
| 05/08/1991 | EP0426150A2 Constant voltage circuit |
| 05/07/1991 | US5013999 Voltage generating circuit using a Schottky barrier diode |
| 05/07/1991 | US5013934 Bandgap threshold circuit with hysteresis |
| 05/02/1991 | WO1991006047A1 Reverse phase control switching circuit and method without zero crossing detection |
| 05/02/1991 | EP0425039A2 Power supply circuit for direct voltage regulators with step-up configuration |
| 05/02/1991 | EP0425024A2 Circuit for limiting the output voltage of a monolithic semiconductor power device which drives a resonant load connected to a power supply |