Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7378824 | Voltage converter capable of avoiding voltage drop occurring in input signal A voltage converter for providing an output voltage signal at an output port according to an input voltage signal is disclosed. The voltage converter comprises a feedback circuit, a transmission switch circuit, a voltage converting circuit, and a pre-bias circuit. T... | 05/27/2008 |
| 7378823 | Multi-output type DC/DC converter with a constant on time interval in a steady state In a multi-output type DC/DC converter, a controller controls, in accordance with first and second output voltages, turning on/off of a switch circuit and selection in an output selection circuit. The controller controls an ON time interval in each time slot of the ... | 05/27/2008 |
| 7378822 | Switching regulator slope compensation generator circuit A slope compensation circuit that provides slope compensation in a switching regulator is provided. The slope compensation circuit preferably is adapted to receive an oscillator pulse train from a pulse width modulator oscillator and a modulator pulse train from a p... | 05/27/2008 |
| 7375503 | System for current sensing in switched DC-to-DC converters A system for sensing the supply current of a switched DC-to-DC converter. The system includes a first circuit that senses a first voltage that is proportional to the supply current, wherein the first voltage has first ripple; a second circuit coupled to the first ci... | 05/20/2008 |
| 7372709 | Power conditioning system for energy sources Apparatus for conditioning power generated by an energy source includes an inverter for converting a DC input voltage from the energy source to a square wave AC output voltage, and a converter for converting the AC output voltage from the inverter to a sine wave AC ... | 05/13/2008 |
| 7372717 | Methods for resistive memory element sensing using averaging A system for determining the logic state of a resistive memory cell element, for example an MRAM resistive cell element. The system includes a controlled voltage supply, an electronic charge reservoir, a current source, and a pulse counter. The controlled voltage su... | 05/13/2008 |
| 7372238 | Apparatus and method for step-down switching voltage regulation A current mode PWM buck regulator is provided. The regulator includes a top-side transistor, a bottom-side transistor, an inductor, a sample-and-hold circuit, a ramp generator, a PWM comparator, an error amplifier, and a current sense amplifier. A current through th... | 05/13/2008 |
| 7372210 | Method and apparatus for lamp heat control A lamp drive circuit includes an electronic switch in series with the lamp and a source of DC voltage, a control input of the switch being pulse-width-modulated by a control circuit which includes a temperature-sensing circuit for reducing the pulse-width-modulation... | 05/13/2008 |
| 7372241 | Apparatus and method for switching voltage regulation A regulator is provided. The regulator includes a main switch, a synchronous switch, an inductor, a sample-and-hold circuit, a ramp generator, a PWM comparator, an error amplifier, and a current sense amplifier. A current through the synchronous switch is sensed by ... | 05/13/2008 |
| 7373527 | System and method for interleaving point-of-load regulators A system and method for providing interleaving point-of-load (POL) regulators such that each regulator's switching cycle is phase displaced with respect to those of other POL regulators in the array is disclosed. As a result, the aggregate input and/or output reflec... | 05/13/2008 |
| 7368898 | Power array system and method A method of sensing current in an output regulator comprises providing a current sensor having a gain resolution, setting the current sensor gain resolution to an initial resolution, sensing a current flowing through the current sensor, evaluating an amplitude of th... | 05/06/2008 |
| 7368901 | Sequential control circuit A sequential control circuit operates according to an input signal. When the input signal is determined at a first state, the sequential control circuit asserts a plurality of control signals in a predetermined sequence. When the input signal is determined at a seco... | 05/06/2008 |
| 7368897 | Load adaptive power converter In some embodiments, a switching mode power converter has an input and an output. The switching mode power converter may be configured to transition between a continuous conduction mode at a first load level and a discontinuous conduction mode at a second load level... | 05/06/2008 |
| 7368934 | Avalanche testing at final test of top and bottom FETs of a buck converter An avalanche test circuit for applying an avalanche test signal to a device under test, comprising a series combination of a voltage source and an inductance; a switching device connected in parallel with said series combination; a diode for being connected to a tes... | 05/06/2008 |
| 7369387 | Apparatus and method for temperature-dependent transient blocking An apparatus and method for temperature-dependent transient blocking employing a transient blocking unit (TBU) that uses at least one depletion mode n-channel device interconnected with at least one depletion mode p-channel device. The interconnection is performed s... | 05/06/2008 |
| 7368833 | Multichannel DC/DC converter An apparatus which has a first stage with an input circuit with an inductive element (1), a second stage with a number of output circuits with loads (3, 4, 5) and a switching means (S1, S2, S3) for controlling the currents from the... | 05/06/2008 |
| 7368896 | Voltage regulator with plural error amplifiers A constant voltage circuit that is capable of realizing high speed response with respect to an abrupt change in an input voltage or a load current is disclosed. The constant voltage circuit includes a first error amplifier with a high direct current gain and a secon... | 05/06/2008 |
| 7369143 | Display device A display device according to the present invention includes a switching regulator control circuit formed of TFTs. A digital switching regulator control circuit is composed of an AD converter circuit, a CPU, a pulse generation circuit or the like. An analog switchin... | 05/06/2008 |
| 7368894 | Method for reducing the cost of voltage regulation circuitry in switch mode power supplies A reduced cost voltage regulation circuit for switched mode power supplies. In one example, a current sense circuit includes a current sense terminal of a voltage regulation circuit. A voltage difference between the current sense terminal and a voltage reference ter... | 05/06/2008 |
| 7365453 | Aqueous solution plate control system and method A system for controlling the operation of conductive plates immersed in an aqueous solution, such as in water treatment applications. The system allows independent control of the current sourced or sunk by each of a plurality of plates. The system also allows each p... | 04/29/2008 |
| 7365525 | Protection for switched step up/step down regulators A four switch voltage converter is regulated for buck mode and boost mode under constant frequency valley-peak current mode control. Protection circuits are responsive to output voltage and regulator current to prevent excessive current that otherwise might result f... | 04/29/2008 |
| 7365603 | FET amplifier, pulse modulation module, and radar device An FET amplifier includes an FET for amplifying a high-frequency signal to be input to the gate on the basis of a gate bias voltage from a gate bias control circuit. In the FET amplifier, a high-frequency signal input circuit and the output portion of an inverting a... | 04/29/2008 |
| 7365661 | Power converter circuitry and method A control system and method for simultaneously regulating the operation of a plurality of different types of switching power converters. The system utilizes in regulating the power converters sampled data and nonlinear feedback control loops. ... | 04/29/2008 |
| 7365526 | Synchronous buck DC/DC converter to perform an improved switching operation by adjusting variable resistor A synchronous buck DC/DC converter to perform an improved switching operation by adjusting a variable resistor is provided. The synchronous buck DC/DC converter includes a switching unit for switching two PWM signals inverted with a dead time and outputting the PWM ... | 04/29/2008 |
| 7365997 | Synchronous switching control circuit for power converters The present invention provides a synchronous switching control circuit for variable switching frequency power converters. It comprises a first circuit to generate a first signal in response to an input synchronous signal of a power converter. A second circuit is cou... | 04/29/2008 |
| 7365499 | Crest factor reduction method for electronically ballasted lamps A buck converter generates a direct current (DC) bus voltage at a buck converter output. An inverter circuit is coupled to the buck converter and configured to receive the generated DC voltage and convert the DC voltage into an alternating current (AC) voltage to dr... | 04/29/2008 |
| 7365998 | Unregulated isolated DC/DC converter with ripple control An unregulated isolated DC/DC converter is configured to receive an input signal and to provide an output signal. A ripple control circuit is coupled to the unregulated isolated DC/DC converter, wherein the ripple control circuit is configured to reduce an amount of... | 04/29/2008 |
| 7362166 | Apparatus for polarity-inversion-protected supplying of an electronic component with an intermediate voltage from a supply voltage The apparatus for polarity-inversion-protected supplying of an electronic component with an intermediate voltage from a supply voltage has a first transistor connected between a terminal for the supply voltage and the electric component, so that a path between a sou... | 04/22/2008 |
| 7362081 | Low-dropout regulator A low-dropout regulator is provided that includes a filter and a bandgap reference generator. The filter includes a resistive device and a capacitor. The bandgap reference generator is coupled to the filter and includes a resistive device controller. The resistive d... | 04/22/2008 |
| 7362077 | Pre-charge method for isolated boost converter A boost control module operates semiconductor switches of a boost converter circuit in an avalanche mode to precharge a boost output capacitor. The boost control module comprises a switching module that complementarily transitions a first semiconductor switch and a ... | 04/22/2008 |
| 7359225 | Method and apparatus to limit output power in a switching power supply Techniques are disclosed to adjust a current limit in a switching regulator. One example switching regulator includes a switch to be coupled to an energy transfer element of a power supply. A controller to generate a drive signal is coupled to control switching of t... | 04/15/2008 |
| 7359219 | Power supply A power supply, including a step-up converter, a resonant converter, and control unit. The step-up converter is connected to the resonant converter; the step-up converter and the resonant converter are each connected to the primary control unit. ... | 04/15/2008 |
| 7358627 | Electronic control systems and methods An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collec... | 04/15/2008 |
| 7358710 | Temperature-compensated inductor DCR dynamic current sensing A resister network having a negative temperature coefficient (NTC) may be utilized to create a temperature compensated equivalent resistance “R” for a current sensing RC network used in measuring inductor current of a DC-to-DC converter or a general switching re... | 04/15/2008 |
| 7358707 | Information handling system including a power supply unit with a power converter for supplying power to multiple outputs An information handling system (IHS) includes a system board and a power supply unit, coupled to the system board. The power supply unit includes a power converter for supplying power to a first output and a second output, a switch, coupled to the power converter, f... | 04/15/2008 |
| 7355375 | Dynamic bias circuit for use with a stacked device arrangement A regulator circuit includes a first transistor coupled to a supply voltage and a second transistor coupled between the first transistor and an output node. The regulator circuit also includes a dynamic bias circuit that may selectively provide a bias voltage to a g... | 04/08/2008 |
| 7355372 | Power control system capable of balancing output currents A power control system includes a voltage control circuit and a plurality of balance circuits. The voltage control circuit controls a voltage level at an output of the power control system according to a reference voltage. Each of the plurality of balancing circuits... | 04/08/2008 |
| 7355373 | DC-DC converter In an up-converter a switching element is controlled both by an integrated control circuit and by a secondary winding on an inductor. High power factor and low total harmonic distortion are achieved while the design of the integrated control circuit is comparatively... | 04/08/2008 |
| 7355374 | Direct current voltage transformer A DC voltage transformer includes an oscillator, which can be controlled in terms of a characteristic such as its phase and/or frequency, and a modulation circuit that provides a periodic or random control signal to the oscillator. A power switch is connected in ser... | 04/08/2008 |
| 7352159 | System and method for managing negative voltage in a power supply overvoltage failure event A synchronous Buck voltage regulator accepts an input voltage to provide a regulated output voltage to an information handling system processing component, such as a CPU. Input voltage is regulated by a control MOSFET, a synchronous MOSFET and a regulator controller... | 04/01/2008 |
