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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 |
| 7237134 | Backup power module for industrial control and monitoring network A technique is provided for applying secondary or backup power to a networked device in the event of a loss or malfunction of network power. In a control and monitoring network. Various devices may receive both power and data signals from a network cable. In the eve... | 06/26/2007 |
| 7235957 | Power supply with current-sharing control and current-sharing method thereof The present invention provides a power-supply apparatus with a current-sharing circuit and a current-sharing method thereof. The power supply with a current-sharing function uses a bus terminal as a current-sharing control interface. A power circuit provides an outp... | 06/26/2007 |
| 7235955 | Method and apparatus for preventing boosting system bus when charging a battery A controllably alternating buck mode DC-DC converter conducts cycle by cycle analysis of the direction of inductor current flow to decide whether to operate in synchronous buck mode or standard buck mode for the next successive cycle. For each cycle of the PWM wavef... | 06/26/2007 |
| 7233130 | Active ripple reduction switched mode power supplies A system and method are provided for actively reducing ripple in a supply voltage provided by a switched mode power supply. In general, active ripple reduction circuitry operates to sense the ripple in the supply voltage to provide a signal indicative of the ripple.... | 06/19/2007 |
| 7233134 | DC-to-DC converter with fast load transient response and method thereof A DC-to-DC converter comprises a sense circuit to sense the output voltage of the converter to generate a feedback signal, a transconductive amplifier to amplify a difference between the feedback signal and a threshold signal to generate a first current and to gener... | 06/19/2007 |
| 7233468 | Level shifter ESD protection circuit with power-on-sequence consideration A level shifter ESD protection circuit with power-on-sequence consideration used for receiving a first signal and outputting a second signal is provided. The level shifter circuit includes an inverter, a first switch, a second switch, a voltage level shifting circui... | 06/19/2007 |
| 7233135 | Ripple converter A ripple converter includes a transistor for switching an input direct-current voltage, a choke coil and a smoothing capacitor for smoothing the switched direct-current voltage, a flywheel diode for causing a current to flow through the choke coil when the transisto... | 06/19/2007 |
| 7230409 | Current limiting using PWM control A method and a system for current limiting using PWM control have been provided. The method includes sensing a load current to produce a control voltage. The control voltage is compared with a reference voltage to produce a detected output signal. Thereafter, the de... | 06/12/2007 |
| 7230431 | Integrating electrometer amplifying circuit An aerosol particle spectrometer utilizes a high voltage central electrode and a series of annular, axially arranged collector electrodes maintained at ground, for collecting positively charged particles suspended in an aerosol flowing between the electrodes. Each c... | 06/12/2007 |
| 7230408 | Pulse frequency modulated voltage regulator with linear regulator control A PFM-type voltage regulator circuit converts an unregulated input voltage into a regulated output voltage using a first transistor controlled by a pulse control circuit and a second transistor controlled by a linear regulator circuit. The linear regulator circuit c... | 06/12/2007 |
| 7230406 | Fixed-frequency current mode converter and control method thereof A fixed-frequency current mode converter comprises a power stage to produce an inductor current and an output voltage, an error amplifier to generate an error signal from the difference between the output voltage and a reference voltage varied with the inductor curr... | 06/12/2007 |
| 7230405 | Non-isolated power conversion system having multiple switching power converters A non-isolated power conversion system has an input stage and an output stage. A plurality of cascaded switching power converter stages are coupled between the input stage and the output stage. Each of the plurality of switching power converter stages has at least o... | 06/12/2007 |
| 7227342 | Extremely high-speed switchmode DC-DC converters Switchmode DC-DC power converters using one or more non-Silicon-based switching transistors and a Silicon-based (e.g. CMOS) controller are disclosed. The non-Silicon-based switching transistors may comprise, but are not necessarily limited to, III–V compound semic... | 06/05/2007 |
| 7225086 | Alternating-source peak-shift power application system, method and program product Apparatus includes a main body having a function of reducing performance of the apparatus during operation, an AC adapter which is connectable to the main body and supplies power to the main body from a commercial power source, and a rechargeable battery which is co... | 05/29/2007 |
| 7224010 | Voltage-controlled amplifier for a signal processing system A voltage-controlled amplifier for a signal processing system includes an input voltage reception end, a first voltage-to-current converter, a reference current generator, a gain adjustment circuit, a first current mirror, and an output circuit. The voltage-controll... | 05/29/2007 |
| 7224153 | Apparatus and method to compensate for effects of load capacitance on power regulator A power regulator has an output for regulated power that is connected to supply power to a load. The load can have various electrical characteristics, including requiring a rapid transient response. The transient response amplitude for the power regulator is decreas... | 05/29/2007 |
| 7221129 | Switching regulator and method for changing output voltages thereof A switching regulator including two switching elements and a control switching part. The two switching elements perform a switching operation according to a control signal to control an output voltage. One of the two switching elements is larger in ON-resistance and... | 05/22/2007 |
| 7221134 | Apparatus and method for flywheel current injection for a regulator A constant on-time regulator that may use a capacitor with low ESR without needing a series resistor is provided. A capacitor is employed to AC-couple a current sense voltage into the reference signal to provide a modified reference signal. The comparator compares t... | 05/22/2007 |
| 7221135 | Method for regulating the time constant matching in DC/DC converters A method regulates the time constant matching of a DC/DC converter phase, further to a variation of a load applied to an output of said phase. Such phase being associated with a coil network, with a series RL circuit and a reading network 10, with a series RC... | 05/22/2007 |
| 7221133 | Hybrid digital-analog switched power supply A switch mode power supply in which a control loop responsive to an input signal representative of the power supply output to provide a compensated error signal; and a PWM signal generator responsive to the compensated error signal to generate a variable duty cycle ... | 05/22/2007 |
| 7218500 | High-voltage generator and accelerator using same In a high-voltage generator including a CW circuit (high-voltage circuit), where the CW circuit generates a high voltage through booster circuits that are provided for boosting an input voltage and connected to one another in multiple stages, a conductive shielding ... | 05/15/2007 |
| 7218088 | Control circuit of DC-DC converter and control method thereof There are provided a control circuit of a DC-DC converter of a synchronous rectification system which can realize rapid lowering of an output voltage with low power consumption at the stop of power supply, and a control method thereof. While a power supply stop sign... | 05/15/2007 |
| 7218085 | Integrated ZVS synchronous buck DC-DC converter with adaptive control DC-DC converters are disclosed that can be integrated onto a semiconductor device. In one embodiment, the invention includes a first MOSFET and a second MOSFET, where the drain of the first MOSFET forms a common node with the drain of the second MOSFET. In addition,... | 05/15/2007 |
| 7218080 | Soft-start apparatus for power supplies A soft-start apparatus for a power supply outputs a compensation signal to a PWM controller as the power supply starts up. Meanwhile, a pulse width of a switching signal outputted from the PWM controller gradually increases from an initial value to a determined valu... | 05/15/2007 |
| 7218086 | Switching regulator with programmable output levels using a single input pin A switching regulator provides programming output current control through a single input terminal by modifying the reference voltage in the control loop of the switching regulator. The switching regulator includes a first input terminal receiving a program input vol... | 05/15/2007 |
| 7215106 | Power supply control circuit, electronic device, and printing apparatus A power supply control circuit for controlling a power supply circuit having a DC/DC converter is provided. A discharge circuit operates based on a discharge instruction signal for instructing discharge and uses a switching element to remove charges of a capacitor c... | 05/08/2007 |
| 7215107 | 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... | 05/08/2007 |
| 7215108 | Method for starting a voltage-mode switching power supply into a biased load A method for starting up a voltage-mode switching power supply into a biased load includes computing a ratio of the load voltage at the biased load to an input voltage of the switching power supply, generating a first signal indicative of the duty cycle of the volta... | 05/08/2007 |
| 7212067 | Voltage regulator with bypass for multi-voltage storage system A system and method for supplying power to a peripheral device where the voltage supplied by a host device may be the voltage required for operation of the peripheral, or a higher voltage. A memory system includes a voltage regulator including an input, and output a... | 05/01/2007 |
| 7208929 | Power efficient startup circuit for activating a bandgap reference circuit A power efficient startup circuit for activating a bandgap reference circuit is disclosed. The startup circuit uses a voltage supply having a voltage level to initiate the flow of a startup current used to activate the bandgap reference circuit. When the bandgap ref... | 04/24/2007 |
| 7208921 | DC-DC regulator with switching frequency responsive to load A switch mode power supply in which the switching frequency is controlled by an oscillator having a nominal frequency, and having an error amplifier to provide an output signal which represents departure of the power supply output from a nominal value, and which fun... | 04/24/2007 |
| 7208923 | Multiple-output power device, and mobile device using the same A multiple-output power device has a plurality of regulators for outputting regulated voltages; a plurality of power terminals for supplying an input voltage to the respective regulators; and a plurality of output terminals for outputting regulated output voltages f... | 04/24/2007 |
| 7208927 | Soft start system and method for switching regulator The present invention introduces methods and circuits to provide a soft start for a switching regulator. A feedback voltage from output terminal is monitored and used to regulate the bias current of the regulator's error amplifier. The present invention also enables... | 04/24/2007 |
| 7208928 | Oscillatorless DC-DC power converter A power converter for coupling an energy source to a load device comprising a selectively coupled output stage to deliver energy from an energy source to a load device, a controller coupled to the output stage, an output stage, a capacitive element coupled to the ou... | 04/24/2007 |
| 7205750 | Power supply for positive and negative output voltages A predetermined positive output voltage to be obtained by raising an input power supply voltage is outputted by switching a switch connected in series with a coil in a switching power supply circuit. On the other hand, in a negative output voltage generating circuit... | 04/17/2007 |
| 7202609 | Noise reduction in a power converter A power converter includes a control device (28) for a switching power converter (10), a switching power converter and a method of controlling a switch in a power converter for reducing audible noise. The power converter includes the control device ( | 04/10/2007 |
| 7202642 | Switching Regulator Capable of Raising System Stability by Virtual Ripple A switching regulator includes a power stage, an output capacitor, a first reference voltage generator, a first virtual ripple generator, a comparator, and a constant-time trigger. The power stage includes a first switch, a second switch coupled to the first switch,... | 04/10/2007 |
| 7202644 | DC—DC converting method and apparatus A DC-DC converting apparatus including a step-up and step-down circuit stepping up/down an input voltage to generate an output voltage and a PWM control circuit. The PWM control circuit generates an error signal, first to third voltages, a first triangular wave sign... | 04/10/2007 |
| 7202652 | Motor driving apparatus incorporating switch device driving apparatus A motor driving apparatus which includes a pair of field-effect transistors connected in series between a first supply voltage and a second supply voltage lower than the first supply voltage, an output smoothing circuit connected to a node between the two field-effe... | 04/10/2007 |
| 7202653 | High efficiency power converter A high efficiency power converter comprises a boost converter for converting an input voltage to a first voltage on a first output, a buck converter for converting the input voltage to a second voltage on a second output, a linear regulator for converting the first ... | 04/10/2007 |
