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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8441238 | Zero current detecting circuit and related synchronous switching power converter A zero current detecting circuit is disclosed. The zero current detecting circuit includes a first zero current comparator for determining current variation on an inductor of a synchronous switching power converter so as to accordingly turn off a down-bridge transis... | 05/14/2013 |
| 8427119 | Power source apparatus A power source apparatus includes a first converter having a reactor L1, a switching element Q1, and a rectifier D1; a second converter connected in parallel with the first converter and having a reactor L2, a switching element Q2,... | 04/23/2013 |
| 8395362 | Controlling a dead time of a switching voltage regulator Embodiments for at least one method and apparatus of controlling a dead time of a switching voltage regulator are disclosed. One method includes generating a regulated output voltage based upon a switching voltage. The method included generating the switching voltag... | 03/12/2013 |
| 8390261 | Maximum power point tracker bypass A circuit arrangement, includes output terminals that provide an output current and input terminals that receive a source current and a source voltage from a DC current source. A maximum power point tracker is coupled between the input terminals and the output termi... | 03/05/2013 |
| 8384363 | Buck DC-to-DC converter and method A method and apparatus for converting a DC voltage to a lower DC voltage, provides for conducting current from an input terminal, through an inductor to charge a capacitor connected to the inductor at an output terminal and to provide a varying range of load current... | 02/26/2013 |
| 8368361 | Switching power converter controller with direct current transformer sensing A power control system includes a current transformer to step down a switch current of a switching power converter. In at least one embodiment, the stepped down current is received by a switching power converter controller. Since the current is received by the contr... | 02/05/2013 |
| 8350539 | Frequency modulation control of a buck-boost power converter A control circuit and method are proposed to generate a control signal to operate a buck-boost power stage of a buck-boost power converter to convert an input voltage to an output voltage. The control circuit and method detect the output voltage to generate an error... | 01/08/2013 |
| 8344711 | Power supply device, control circuit and method for controlling power supply device A power supply device including a converter having a switch circuit to which an input voltage is supplied and a coil coupled between the switch circuit and an output end from which an output voltage is output; and a control circuit comparing between a feedback volta... | 01/01/2013 |
| 8339115 | Voltage regulator bypass resistance control Embodiments for at least one method and apparatus of controlling a bypass resistance of a voltage regulator are disclosed. One method includes generating a regulated output voltage based upon a switching voltage. The switching voltage is generated through controlled... | 12/25/2012 |
| 8339114 | Controllers for controlling currents to predetermined current references A high-side switch is coupled to a power supply terminal and selectively coupled to ground via a conduction path. During an on state duration, the high-side switch can be enabled and the conduction path can be disabled. During an off state duration, the high-side sw... | 12/25/2012 |
| 8330435 | Hysteretic controlled buck-boost converter An apparatus includes a buck boost converter for generating a regulated output voltage responsive to an input voltage. The buck boost converter includes an inductor, a first pair of switching transistors responsive to a first PWM signal and a second pair of switchin... | 12/11/2012 |
| 8324873 | Power supply apparatus and power supply method A power supply apparatus is provided which includes: a first switch provided between an inductor and a terminal to which a reference voltage is applied; a second switch provided between the inductor and an output terminal; a first comparator circuit that compares an... | 12/04/2012 |
| 8319482 | Power supply and power control device A power supply includes a first switch and a second switch coupled in series between an input voltage terminal to which an input voltage is applied and a reference voltage terminal to which a reference voltage lower than the input voltage is applied, an inductor dis... | 11/27/2012 |
| 8305053 | System and method for controlling a power switch in a power supply system One embodiment of the invention includes a power supply system. The system includes at least one power switch configured to be activated and deactivated based on a duty-cycle of a respective at least one control signal to generate an output voltage. The system also ... | 11/06/2012 |
| 8299764 | System and method for determining output voltage level information from phase voltage for switched mode regulator controllers A controller integrated circuit for a switched mode regulator which converts an input voltage to an output voltage. The controller includes a phase pin, a modulation circuit and a filter. The modulation circuit is configured to regulate the output voltage using the ... | 10/30/2012 |
| 8294433 | Constant current supply type of switching regulator A disclosed constant current supply type switching regulator includes a switching element configured to activate a switch operation depending on an input control signal, an inductor configured to be charged with the input voltage in response to the switching element... | 10/23/2012 |
| 8294434 | Constant current output control type switching regulator A constant current output control type switching regulator that reduces the number of parts, resolves the loss of the current running in the resistor, and eliminates the need to change the time constant of the integrator due to changing the inductor value. The switc... | 10/23/2012 |
| 8283901 | Power converter with power switch operable in controlled current mode A power converter and method of controlling a power switch therein to improve power conversion efficiency at low output current. In one embodiment, the power converter includes a first power switch coupled to a source of electrical power and a second power switch co... | 10/09/2012 |
| 8283902 | Error amplification for current mode control switching regulation A voltage regulator has a switch configured to alternately couple and decouple a voltage source through an inductor to a load, feedback circuitry to generate a feedback current, a current sensor configured to measure the feedback current, and a controller configured... | 10/09/2012 |
| 8248044 | Voltage regulator bypass resistance control Embodiments for at least one method and apparatus of controlling a bypass resistance of a voltage regulator are disclosed. One method includes generating a regulated output voltage based upon a switching voltage. The switching voltage is generated through controlled... | 08/21/2012 |
| 8248043 | Control circuit for DC-DC converter, control method for DC-DC converter, and electronic device A control circuit for a DC-DC converter includes a controller configured to control, based on a feedback voltage, a first switch provided between an inductor and a reference potential and a second switch provided between a coupling node of the first switch and the i... | 08/21/2012 |
| 8222873 | Current mode bang-bang regulator amplifier A circuit for regulating voltage in a power driver, the circuit comprising a current amplifier adapted to measure current flowing through an input resistor, separate AC and DC components of the current flowing through an input resistor, and apply an AC gain factor t... | 07/17/2012 |
| 8212536 | Stacked NMOS DC-to-DC power conversion Embodiments for at least one method and apparatus of generating a regulated voltage are disclosed. One method includes generating the regulated voltage though controlled closing and opening of a series switch element and shunt switch element, the series switch eleme... | 07/03/2012 |
| 8207714 | Method and apparatus for external control mode step down switching regulator A switching regulator integrated circuit (IC) is disclosed that includes a switch circuit that further includes a first switch and a second switch, a mode selector circuit controlled by external circuitry to select between a first mode and a second mode, and a contr... | 06/26/2012 |
| 8198875 | Voltage regulator Provided is a voltage regulator capable of securely preventing a reverse current from an output terminal (122) with lower current consumption, irrespective of magnitude of a voltage of a VDD terminal (121). Such a configuration is adopted that the volt... | 06/12/2012 |
| 8193786 | Driving circuit for depletion mode semiconductor switches A driving circuit for a half bridge utilizing bidirectional semiconductor switches in accordance with an embodiment of the present application includes a high side driver operable to control a high side bidirectional semiconductor switch, wherein the high side drive... | 06/05/2012 |
| 8193785 | Power supply A switching regulator for regulating an ac signal, and method of supplying power thereto wherein the regulator includes a positive half cycle part and a negative half-cycle part arranged to regulate the respective parts of an input ac signal. Each half-cycle part in... | 06/05/2012 |
| 8179106 | DC-DC converter A synchronous-rectifier type DC-DC converter includes a high-side main switch element, a low-side rectifying switch element, and a control drive circuit. The rectifying switch element includes a rectifying transistor element and a rectifying diode element connected ... | 05/15/2012 |
| 8179105 | Systems and methods for controlling output currents of power converters A power converter can include a high-side switch coupled to a power supply terminal and selectively coupled to ground via a conduction path. During an on state duration, the high-side switch can be enabled and the conduction path can be disabled. During an off state... | 05/15/2012 |
| 8169200 | Power converter with power switch operable in controlled current mode A power converter and method of controlling a power switch therein to improve power conversion efficiency at low output current. In one embodiment, the power converter includes a first power switch coupled to a source of electrical power and a second power switch co... | 05/01/2012 |
| 8154261 | Power converter with power switch operable in controlled current mode A power converter and method of controlling a power switch therein to improve power conversion efficiency at low output current. In one embodiment, the power converter includes a first power switch coupled to a source of electrical power and a second power switch co... | 04/10/2012 |
| 8134349 | Power supply circuit that outputs a voltage stepped down from a power supply voltage A power supply circuit has a constant voltage circuit, a first MOS transistor, a second MOS transistor, a third MOS transistor, a first voltage dividing circuit that outputs a first divided voltage obtained by dividing the voltage of the output terminal by a first v... | 03/13/2012 |
| 8120335 | Average inductor current mode switching converters An average current mode switching converter is described for providing a regulated output current independent of load conditions, and a regulated output voltage as a function of the load connected to the converter. The converter includes an inductor, a modulator, a ... | 02/21/2012 |
| 8120336 | Switching regulator circuit, system, and method for providing input current measurement without a dedicated input current sense element A synchronous regulator includes a controller coupled to receive a reference signal and a feedback signal from the regulator and being operable to provide a pulse width modulation (PWM) signal at its output. The regulator includes at least one gate driver coupled to... | 02/21/2012 |
| 8111051 | Step-down switching regulator An output monitoring comparator outputs an ON signal when an output voltage becomes lower than a reference voltage. A pulse modulator generates a pulse signal at a predetermined level, an ON time-period from when the ON signal is outputted. A driver circuit alternat... | 02/07/2012 |
| 8089253 | Power supplies for RF power amplifier Switched-mode power supplies (SMPSs) and their control methods for radio frequency (RF) power amplifiers in battery-powered wireless transmitter devices involve a Boost-type SMPS and a Buck-type SMPS in cascade connection which are controlled so that high efficiency... | 01/03/2012 |
| 8085007 | Switching power supply circuit A switching power supply circuit, which includes: a switch; a coil serving as an energy transmitting element; and a capacitor serving as an output generation circuit that outputs, as an output voltage, the energy transmitted from the coil. The switching power supply... | 12/27/2011 |
| 8072195 | Voltage converter A voltage converter connectable to a power source (PS) and a load (LD) provides a regulated output voltage (Vout) from a voltage (Vin) power source by switchable current paths including an inductive element (L). The voltage converter includes a plurality of switchin... | 12/06/2011 |
| 8044641 | Step-down switching regulator with turn off undershoot prevention A step-down switching regulator prevents an output voltage undershoot and enables a quick lowering of an output voltage immediately after turning off of power supply. The step-down switching regulator includes an NMOS transistor connected between an output terminal ... | 10/25/2011 |
| 8044642 | Power supply device capable of stably supplying output voltage with increased responsiveness In a power supply device, a synchronous rectifier step-down converter alternately turns on and off a switch and a synchronous rectifier switch. A reference voltage generator generates a predetermined reference voltage. An error amplifier outputs an error voltage suc... | 10/25/2011 |
