| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 323300000 | Phase controlled switching using electronic tube or a three or more terminal semiconductive device | 16 |
| 20080238399 | Buffer Circuit Having Multiplexed Voltage Level Translation - A buffer circuit is selectively operative in one of at least a first mode and a second mode as a function of a first control signal supplied to the buffer circuit. The buffer circuit includes interface circuitry operative to receive at least second and third control signals referenced to a first voltage level, and to generate an output signal referenced to a second voltage level, the second voltage level being greater than the first voltage level. The output signal is a function of the second control signal in the first mode and is a function of the third control signal in the second mode. The buffer circuit further includes at least first and second circuit portions coupled to the interface circuitry, each of the first and second circuit portions including at least one control input operative to receive the output signal generated by the interface circuitry. | 10-02-2008 |
| 20090115393 | PHOTOVOLTAIC POWER GENERATION CONTROLLER AND POWER EVALUATION METHOD IN PHOTOVOLTAIC POWER GENERATION CONTROL - A photovoltaic power generation controller, in which minute power change is detected even with a low-resolution AD converter, thereby being capable of performing maximum power point tracking control with high accuracy, is provided. In the photovoltaic power generation controller of the invention, a control circuit | 05-07-2009 |
| 20090115394 | Semiconductor integrated circuit - A semiconductor integrated circuit includes: a main-interconnect to which supply voltage or reference voltage is applied; a plurality of sub-interconnects; a plurality of circuit cells configured to be connected to the plurality of sub-interconnects; a power supply switch cell configured to control, in accordance with an input control signal, connection and disconnection between the main-interconnect and the sub-interconnect to which a predetermined one of the circuit cells is connected, of the plurality of sub-interconnects; and an auxiliary interconnect configured to connect the plurality of sub-interconnects to each other. | 05-07-2009 |
| 20090189589 | Method of Regulating an AC Signal - A switching regulator and method of regulating an ac input signal to provide an ac output signal, receiving the ac input signal, generating a reference signal, detecting the points when the ac input signal is zero and synchronising the reference signal to these points, performing a subtraction between the reference and ac input signals to obtain an error signal, dividing the error signal by the reference signal to obtain a fractional error, and producing a regulated ac output signal by modulating the ac input signal to correct for the fractional error. The switching regulator uses a modulating transistor and clamping diode for each half-cycle of the input signal. | 07-30-2009 |
| 20100052641 | System and Method for Improving Efficiency of a Power Factor Correction Boost Pre-Regulator - A power supply device comprises a driver circuit, a transistor switch, and a first transistor. The driver circuit is configured to provide a stable driving signal and a floating driving signal. The transistor switch has a first terminal, a second terminal connected to a first terminal of the driver circuit, and a third terminal connected to a second terminal of the driver circuit, and is configured to prevent a reverse current based on the floating driving signal. The first transistor has a first current electrode connected to the first terminal of the transistor switch, a second current electrode connected to the first voltage reference, and a control electrode connected to the third terminal of the driver circuit, and is configured to activate and deactivate based on the stable driving signal, and further configured to regulate an input voltage to a substantially constant direct current output voltage. | 03-04-2010 |
| 20100141231 | Igniter voltage compensation circuit - Featured is igniter control circuitry that reduces the line voltage to the igniter and which maintains the igniter voltage relatively stable. More particularly, there is featured, a thyristor-based phase control circuit that reduces the RMS voltage being applied to an igniter when it is connected to the AC line or line voltage. The circuitry also is configured so that it opposes changes in line voltage such that the igniter voltage remains relatively stable when the line voltage increases or decreases relative to its nominal level. Such control circuitry includes a dual diac configuration, a relation oscillator configuration and one embodying both dual diac and relation oscillator configurations. | 06-10-2010 |
| 20100156380 | PHASE DETECTING DEVICE, PHASE CONTROL DEVICE INCLUDING THE PHASE DETECTING DEVICE, AND FUSER CONTROL DEVICE INCLUDING THE PHASE CONTROL DEVICE - A phase detecting device includes a power input unit that receives an AC voltage; a phase detector that detects zero-crossing points of the AC voltage, and outputs a phase detecting signal when the zero-crossing points of the AC voltage are detected; and a power switch that selectively cuts off a flow of AC into the power input unit in response to a mode control signal. | 06-24-2010 |
| 20120286758 | Controller - This invention relates to a controller, more particularly, to a controller for driving a power transistor for obtaining improving impedance matching. An embodiment of a flow chart is revealed for the operation of the controller. The controller has frequency modulation capability with Lenz current of a loop linking to the driven power transistor to function with, Miller effect cancelling capability to its driven power transistor and fault detecting capability by detecting the absence of a Lenz current of a loop linking to the driven power transistor to function with. | 11-15-2012 |
| 20130257406 | Method And Apparatus For Phase-Controlling A Load - A load control device may control the amount of power provided to an electrical load utilizing a phase control signal that operates in a reverse phase control mode, a center phase control mode, and a forward phase control mode. A load control device may be configured to determine that the electrical load should be operated via a phase control signal operating in a forward phase-control mode. After determining to operate the electrical load via the phase control signal in the forward phase-control mode, the load control device may provide the phase control signal in a reverse phase-control mode for a predetermined period of time to the electrical load, for example, to charge a bus capacitor of the electrical load. Subsequently, the load control device may be configured to provide the phase control signal in the forward phase-control mode to the electrical load. | 10-03-2013 |
| 20140266127 | LOW POWER AND DYNAMIC VOLTAGE DIVIDER AND MONITORING CIRCUIT - A voltage divider circuit is provided that automatically and dynamically adjusts its voltage divider chains as a supply voltage changes. The voltage divider circuit includes a plurality of voltage divider branches having different divider factors to divide the supply voltage and obtain a divided supply voltage. Additionally, a control circuit is coupled to the plurality of voltage divider branches and adapted to automatically monitor the supply voltage and dynamically select a voltage divider branch from among the plurality of voltage divider branches to maintain a selected divided supply voltage within a pre-determined voltage range. | 09-18-2014 |
| 20140375295 | DC-DC Converter - A DC-DC converter includes: an error amplifier for outputting an error between an output voltage and a predetermined voltage; a phase compensation impedance element for accumulating the error across one end to generate an error phase; a determination unit for determining whether the voltage output by the error amplifier is higher, or lower than a reference voltage that is consonant with the predetermined voltage, and outputting a determination signal indicating determination results; and a voltage setting unit for setting a voltage for one end of the phase compensation impedance element higher than a lower output voltage limit for the error amplifier when the determination signal indicates that the voltage output by the error amplifier is lower than the reference voltage, or for canceling setting of the voltage when the determination signal indicates that the voltage output by the error amplifier is higher than the reference voltage. | 12-25-2014 |
| 20150035512 | Charge Pump and Switch Control Circuit - A charge pump includes: a first diode that is connected to a first node; a second diode that is connected to a second node; a pump capacitor that is connected to a third node to which the first diode and the second diode are connected; a power supply capacitor that is connected to the pump capacitor; a third diode that is connected between the pump capacitor and the power supply capacitor; and a zener diode that is connected in parallel to the third diode and the power supply capacitor. A power supply device decreases a ripple of an output current using a ripple reduction signal. | 02-05-2015 |
| 20150381068 | LOAD CONTROL DEVICE FOR HIGH-EFFICIENCY LOADS - A load control device for controlling the power delivered from an AC power source to an electrical load includes a thyristor, a gate coupling circuit for conducting a gate current through a gate of the thyristor, and a control circuit for controlling the gate coupling circuit to conduct the gate current through a first current path to render the thyristor conductive at a firing time during a half cycle. The gate coupling circuit is able to conduct the gate current through the first current path again after the firing time, but the gate current is not able to be conducted through the gate from a transition time before the end of the half-cycle until approximately the end of the half-cycle. The load current is able to be conducted through a second current path to the electrical load after the transition time until approximately the end of the half-cycle. | 12-31-2015 |
| 20160033988 | POWER CONVERTER USING CHARGE PUMP DIVIDER AND METHOD THEREFOR - A power converter uses a charge pump divider that includes a capacitive divider core and a phase clock generator. The capacitive divider core has an input for receiving an input voltage and an output for providing an output voltage. In a first phase the capacitive divider core is adapted to couple a flying capacitor in series with an output capacitor. In a second phase the capacitive divider core is adapted to couple the flying capacitor in parallel with the output capacitor. The phase clock generator activates a first phase clock indicating the first phase when a flying voltage across the flying capacitor is less than a predetermined portion of the input voltage minus a peak voltage, and subsequently activates a second phase clock indicating the second phase when the flying voltage exceeds the predetermined portion of the input voltage plus the peak voltage. | 02-04-2016 |
| 20160054751 | MATRIX CONVERTER, MATRIX CONVERTER CONTROL DEVICE AND MATRIX CONVERTER CONTROL METHOD - A matrix converter includes a power converter and a commutator. The power converter includes a plurality of bidirectional switches provided between respective phases of an AC power source and respective phases of a load. The commutator is configured to perform commutation control by which input phases connected to output phases are switched using the bidirectional switches. The commutator includes a selector configured to select one commutation pattern from a plurality of commutation patterns based on at least one of a state of phase voltages of the AC power source and a state of phase currents of the load, and a commutation controller configured to perform commutation control by controlling the bidirectional switches pursuant to the commutation pattern selected by the selector to switch a connection state of the AC power source and the load. | 02-25-2016 |
| 20160066379 | CONTROLLABLE-LOAD CIRCUIT FOR USE WITH A LOAD CONTROL DEVICE - A load control device for controlling the amount of power delivered from an AC power source to an electrical load is operable to conduct enough current through a thyristor of a connected dimmer switch to exceed rated latching and holding currents of the thyristor. The load control device comprises a controllable-load circuit operable to conduct a controllable-load current through the thyristor of the dimmer switch. The load control device disables the controllable-load circuit when the phase-control voltage received from the dimmer switch is a reverse phase-control waveform. When the phase-control voltage received from the dimmer switch is a forward phase-control waveform, the load control device is operable to decrease the magnitude of the controllable-load current so as to conduct only enough current as is required in order to exceed rated latching and holding currents of the thyristor. | 03-03-2016 |
