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| Number | Title | Issue Date |
| 8120934 | Voltage converter and method for voltage conversion A voltage converter comprises a first, a second and a third capacitor (11, 12, 13) which are switched in series in at least one operating state, an input (1) for supplying an input voltage (VIN), an output (2) for providing an output voltage (VO... | 02/21/2012 |
| 8068356 | Low power one-shot boost circuit This invention discloses a voltage boost circuit which comprise at least one capacitor with a first terminal connected to an output of the voltage boost circuit, a controllable switch connected between a second terminal of the capacitor and a voltage source, the sec... | 11/29/2011 |
| 8045349 | Charge pump-type DC/DC converter A charge pump-type DC/DC converter is provided that steadily operates even when boosting reference voltage is low. A PMOS transistor for short-circuiting an output terminal of a charge pump of an initial stage with a booster reference voltage is provided to eliminat... | 10/25/2011 |
| 8040701 | Control circuit and method for charge pump circuit with pulse modulation A first switch group includes switches provided on a path for charging a flying capacitor using an input voltage. A second switch group includes switches provided on a path for charging an output capacitor using charge stored in the flying capacitor. A pulse modulat... | 10/18/2011 |
| 8000118 | Method and system for delivering a controlled voltage In general, in one aspect, the invention relates to a method for delivering a controlled voltage. The method involves, during a first electric pulse delivered to a primary transformer, holding a first switching section open to isolate the controlled voltage, where t... | 08/16/2011 |
| 8000117 | Buck boost function based on a capacitor bootstrap input buck converter A buck boost voltage converter circuit has a capacitor pump circuit for boosting an input voltage in a first mode of operation when an input voltage is below a desired voltage level. A buck converter circuit provides the output voltage responsive to the boosted inpu... | 08/16/2011 |
| 7995364 | DC/DC converter circuit and controller thereof The present invention uses a multi-phase oscillator or a mono-stable circuit in order to charge the output instantly or within an acceptable time period when a charge pump circuit is in a PFM mode and an output voltage is below a preset voltage level. Therefore, the... | 08/09/2011 |
| 7990741 | Comparator controlled charge pump for negative voltage booster Charge pumps and methods for regulating charge pumps. The charge pump includes a voltage booster circuit and a voltage regulator circuit. The voltage booster circuit includes first and second input terminals that respectively receive a regulation voltage and an inpu... | 08/02/2011 |
| 7903437 | Frequency-changing voltage regulation circuit The present invention discloses a frequency-changing voltage regulation circuit, which applies to a power supply device that has a booster unit and a power conversion unit. The booster unit modulates an input power and converts the input power into a boosted power. ... | 03/08/2011 |
| 7894220 | Voltage generating circuit A voltage generating circuit is provided, including a voltage output terminal, a ground terminal, a capacitor, a selector, a first switch, and a second switch. The capacitor is connected between a pump signal and the output of the selector. The selector is controlle... | 02/22/2011 |
| RE42066 | System and method for power-efficient charging and discharging of a capacitive load from a single source A system and method for efficiently charging and discharging a capacitive load from a single voltage source. The system includes a first switch for selectively connecting the voltage source to the load and a second switch for selectively providing a short across the... | 01/25/2011 |
| 7872884 | Cascaded step-up converter and charge pump for efficient compliance voltage generation in an implantable stimulator device Disclosed herein are circuits and methods for generating a compliance voltage from a battery voltage in an implantable stimulator device. In one embodiment, the battery voltage is boosted to form the compliance voltage for driving the current sources (DACs) that pro... | 01/18/2011 |
| 7864553 | Power supply circuit and portable device In a power supply circuit, a first switching transistor and a second switching transistor are serially connected between another-side terminal GND and a one-side terminal VCC of an input power supply, and a third switching transistor and a fourth switchin... | 01/04/2011 |
| 7855904 | Apparatus for producing voltage and current pulses An apparatus having one or more modular stages for producing voltage and current pulses. Each module includes a diode charging means to charge a capacitive means that stores energy. One or more charging impedance means are connected to the diode charging means to pr... | 12/21/2010 |
| 7843712 | Charge pump for positive pumping and negative pumping A miniaturized system on a chip that incorporates a positive high voltage charge pump and a negative high voltage charge pump into one pump circuit and shares components. A voltage control apparatus in a semiconductor device may include at least one of the following... | 11/30/2010 |
| 7817451 | Switch gear cell and converter circuit for switching a multiplicity of voltage levels with a switchgear cell such as this A switchgear cell having a group of connection is disclosed, with the group of connection having a first and a second controllable bidirectional power semiconductor switch and a capacitor. In order to reduce the stored electrical energy and to save space, the group ... | 10/19/2010 |
| 7804698 | Switched capacitor controller and method therefor In one embodiment, a switch capacitor controller (20) is configured to use a drive signal (45) to drive the switched capacitor (26) with a signal having a time dependent transition time. ... | 09/28/2010 |
| 7764525 | Apparatus of dynamic feedback control charge pump An apparatus of dynamic feedback control charge pump is provided. The apparatus of dynamic feedback control charge pump receives an input voltage through a voltage regulator. The voltage regulator regulates the input voltage to a base voltage according to a control ... | 07/27/2010 |
| 7746676 | Charge pump A charge pump includes a first capacitor, a first switch with adjustable on-state resistance, a second switch, a third switch, a fourth switch, a feedback loop, and an oscillator. The first switch is coupled between a first electrode of the first capacitor and an ou... | 06/29/2010 |
| 7738271 | Controlled resonant charge transfer device Methods and devices for achieving a desired output in a resonant charge transfer device are given. In an exemplary embodiment a controlled resonant charge transfer device comprises first and second filter sections, first and second switch sections, a charge storage ... | 06/15/2010 |
| 7729141 | Three phase voltage tripler A voltage tripler circuit includes a plurality of switches and first, second, and third capacitors each having first and second terminals that are selectively interconnected via the plurality of switches. The first capacitor charges to a supply voltage during a firs... | 06/01/2010 |
| 7724551 | Step-up circuit and portable device using it According to the invention, as an input voltage of a certain step-up unit of a plurality of stages of step-up units, a stepped-up output of a step-up unit in a stage preceding the certain step-up unit is inputted. This makes it possible to increase the level of a vo... | 05/25/2010 |
| RE41217 | Method and apparatus for reducing stress across capacitors used in integrated circuits A method, apparatus, and system for controlling the voltage levels across capacitors coupled between a first node and a second node of an integrated circuit so that the voltage levels across these capacitors will not exceed the breakdown voltage limitation of these ... | 04/13/2010 |
| 7692939 | Control circuit In a control circuit for powering up a switching power supply into a powered output bus, the control circuit is built such that before a turning-on of the switching power supply the controller reference is the slave that follows the bus voltage which is the master. ... | 04/06/2010 |
| 7656688 | DC-DC converter for a display A DC-DC converter for a display. The DC-DC converter comprises a negative voltage generator, a level sifter and a DC-DC sub-converter. The negative generator generates a negative voltage. The level shifter, coupled to the negative voltage generator, generates comple... | 02/02/2010 |
| 7639519 | Switching booster power circuit A switching booster power circuit includes a power switch, a booster circuit, a switching control, a voltage detector and a delay circuit. The voltage detector detects an input voltage value at a predetermined point of an electricity supply line from the power switc... | 12/29/2009 |
| 7633778 | Switched-capacitor regulators A switched-capacitor regulator is provided for regulating the output voltage of a voltage supply. The switched-capacitor regulator includes a supply input terminal capable of receiving a supply voltage, two or more flying capacitors, a regulation switch located betw... | 12/15/2009 |
| 7545658 | DC-DC boost converter with a charge pump A DC-DC boost converter comprises a charge pump selectively operating in a voltage doubler or in a voltage tripler mode. A switching arrangement connects the charge pump to an input voltage terminal in a charge phase and to an output voltage terminal in a discharge ... | 06/09/2009 |
| 7522433 | Efficient voltage rail generation A voltage reference generation circuit having switch pairs coupled to systematically commutate a flying capacitor among adjacent pairs of voltage rail outputs. The circuit requires only a single flying capacitor, N+1 switch pairs, and N storage capacitors, to genera... | 04/21/2009 |
| 7505290 | Power supply apparatus including charge-pump type step-up circuit having different discharging time constants In a power supply apparatus, a charge-pump type step-up circuit is adapted to charge a step-up capacitor by a power supply voltage, step up a charged voltage of the step-up capacitor using a charge-pump operation, and discharge a stepped-up voltage to a smoothing ca... | 03/17/2009 |
| 7502239 | Charge pump circuit and power supply circuit A charge pump circuit is provided for generating a voltage (1+1/n) times as high as a supply voltage. The charge pump circuit eliminates the need for diodes for preventing a current from flowing back from a high potential side of capacitors to prevent a reduction in... | 03/10/2009 |
| 7466572 | Three phase voltage tripler A three-phase voltage tripler includes first, second, and third capacitive elements and a switching module. The switching module selectively switches connections among the capacitive elements and between the capacitive elements and a reference voltage during first, ... | 12/16/2008 |
| 7436239 | Electronic device including charge pump circuit Provided is an electronic device including a charge pump circuit whose circuit structure is simple and boosting efficiency is high. The charge pump circuit uses MOSFETs as charge transfer elements and has a structure in which a voltage of a gate of a charge transfer... | 10/14/2008 |
| 7430133 | Apparatus and method for switch connected as a diode in a charge pump A switched-capacitor type voltage regulator is provided. The regulator includes a flying capacitor and switches, including first and second transistors which operate as switches. The switches are arranged to operate such that the flying capacitor is coupled to an in... | 09/30/2008 |
| 7427889 | Voltage regulator outputting positive and negative voltages with the same offsets A voltage regulator has a first charge circuit, a second charge circuit, and a control circuit. The control circuit has five input terminals and two output terminals. The five input terminals are respectively coupled to a reference voltage, a first voltage source, a... | 09/23/2008 |
| 7411799 | Apparatus and method for regulating a switching device An apparatus for regulating a switching device that couples an output locus with one of a first voltage locus and a second voltage locus in response to a driver unit includes: a voltage feedback unit coupling the driver unit with at least one of the first voltage lo... | 08/12/2008 |
| 7397677 | Apparatus and method for charge pump control with adjustable series resistance A charge pump is provided. The charge pump may include an oscillator, a first switch, a second switch, a capacitor/switch network, an error amplifier, an adjustable resistance circuit, a first switch driver, and a second switch driver. In one embodiment, the first a... | 07/08/2008 |
| 7397680 | Method and apparatus for balancing active capacitor leakage current A circuit that provides a method and apparatus to actively balance capacitor leakage current from series stacked capacitors and disconnects itself when stacked capacitors are configured for doubler operation. In one embodiment, the active circuit includes high volta... | 07/08/2008 |
| 7394307 | Voltage regulator having reverse voltage protection and reverse current prevention A voltage regulator having a MOS transistor driver includes a p-channel MOS transistor at a voltage input terminal Vin and a p-channel MOS transistor at a voltage output terminal Vout. A drain of the input side p-channel MOS transistor is connected to the voltage in... | 07/01/2008 |
| 7382634 | Voltage multiplier with charge recovery Capacitive voltage multiplier for generating voltage pulses, preferably up to 100 V, that are higher than the supply voltage for displays, non-volatile memories and corresponding units especially in small electronic devices, such as handheld telecommunication termin... | 06/03/2008 |
