Electricity: power supply or regulation systems inventions 01/08

20080024092 - Power supply and image forming device having the same: A power supply, which outputs a plurality of voltages in order to improve the cross regulation between output voltages and at the same time reduce the amount of electric power consumed, and an image forming device having the same are disclosed. The power supply comprises a power converter, which generates... Agent: Stein, Mcewen & Bui, LLP

20080024093 - Semiconductor device: According to the present invention, a semiconductor device is provided wherein a stepdown-type DC-DC converter includes a first off detection circuit, a second off detection circuit, a capacitor, a capacitor, a diode, inverters, an inductor, a first level shift circuit, a second level shift circuit, a third level shift circuit,... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080024094 - Resonant switching power supply device: For the purpose of providing a resonant switching power supply device having a wide output voltage variable range by changing its switching frequency, the resonance circuit thereof comprises a switching transformer, a first resonance section connected in series with the switching transformer, and a second resonance section connected in parallel... Agent: Gregory A. Stobbs

20080024095 - Method and circuit for limiting output voltage in a switched-mode power supply, and a switched-mode power supply: A switched-mode power supply (200, 300, 400) comprises a primary side, a secondary side and a transformer (103, 303, 403) therebetween. An output on the secondary side delivers an output voltage and an output current to a load. An output voltage control circuit (110, 113, 801) keeps the output voltage... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20080024096 - Hybrid charge pump regulation: Techniques for reliably and efficiently generating an output voltage for use within an electronic device, such as a memory system, are disclosed. A voltage generation circuit generates the output voltage. The voltage generation circuit includes regulation circuitry that controls regulation of the output voltage to maintain the output voltage at... Agent: Beyer Weaver LLP/ Sandisk

20080024097 - Semiconductor integrated circuit supplying voltage to a load using a charge pump and electronic device including the same: A semiconductor integrated circuit includes a charge pump boosting an input voltage and outputting the boosted voltage to a load, and a charge pump control circuit outputting a voltage to the charge pump based on the output voltage of the charge pump and determining an upper limit value of a... Agent: Fish & Richardson P.C.

20080024100 - Low-gain current-mode voltage regulator: In a low-gain current-mode voltage regulator having a PWM comparator in response to the varying output voltage and inductor current of the voltage regulator to produce a PWM signal to regulate the output voltage, an offset signal is derived from a subtraction between the inputs of the PWM comparator, and... Agent: Rosenberg, Klein & Lee

20080024102 - Multi-die dc-dc buck power converter with efficient packaging: A DC-DC buck converter in multi-die package is proposed having an output inductor, a low-side Schottky diode and a high-side vertical MOSFET controlled by a power regulating controller (PRC). The multi-die package includes a first die pad with the Schottky diode placed there on side by side with the vertical... Agent: Chein-hwa S. Tsao

20080024101 - Output ripple control circuit and method for a pwm system: An output ripple control circuit and method for a PWM system uses a hysteresis threshold to clamp the output ripple of the PWM system such that the output ripple will not vary with the dc level of the output voltage, and therefore the output ripple control may be combined into... Agent: Rosenberg, Klein & Lee

20080024099 - Power supply apparatus: A switching regulator type power supply apparatus that converts an input voltage and then feeds the voltage thus converted to a smoothing circuit, and that operates in such a way that an output from the smoothing circuit becomes equal to a predetermined output voltage includes a control circuit for generating... Agent: Fish & Richardson P.C.

20080024103 - Switching regulator: The switching regulator has a first switching regulator circuit for outputting a variable power according to a pulse width modulation pulse to be supplied; a second switching regulator circuit for outputting or stopping a constant power according to a control signal to be supplied; and a control circuit for controlling... Agent: Oliff & Berridge, PLC

20080024098 - Current direction detection circuit and switching regulator having the same: A current direction detection circuit includes a monitoring transistor having a control terminal and an output terminal respectively connected with a control terminal and an output terminal of a ground side output transistor; an impedance element having one terminal connected with an input terminal of the monitoring transistor and the... Agent: Rohm Co., Ltd. C/o Keating & Bennett, LLP

20080024104 - Dc-dc converter: A DC-DC converter performing pulse frequency modulation (PFM) control with a fixed ON time, having a control circuit performing PFM control of the ON time for a switch, including an error amplifier amplifying the difference between an output voltage and a target voltage, a voltage controlled oscillator increasing and decreasing... Agent: Rabin & Berdo, PC

20080024105 - Method and apparatus for adjusting a reference: Examples of a method and apparatus for adjusting a reference are disclosed. In one aspect of the invention, a circuit includes a current divider to divide a current from a current source into a first current and a reference current. The circuit also includes a current mirror coupled to the... Agent: Blakely Sokoloff Taylor & Zafman

20080024106 - Powered device including a detection signature resistor: A method is provided that includes receiving a detection voltage at a powered device from a powered network, applying the detection voltage to an external resistor to provide a detection signature to the powered network, and applying a reference voltage to the external resistor to generate a reference current after... Agent: Toler Law Group

20080024107 - 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... Agent: Stein, Mcewen & Bui, LLP

20080024108 - Power sequencing circuit: The present invention provides a self-contained power management device, such as a power management IC or an IC including power management functions, which allow sequenced start up of power supplies without the need for an external sequencer and with a simple user configurable arrangement.... Agent: Dickstein Shapiro LLP

20080024109 - Circuit arrangement having a changeover apparatus and method for operating a circuit arrangement: A circuit arrangement having a changeover apparatus which provides a first voltage in a first state and a second voltage in a second state in order to operate a circuit, where the changeover apparatus is designed such that when changing over from the first state to the second state the... Agent: Dickstein Shapiro LLP

20080018310 - Detection circuitry: Embodiments of detection circuitry are disclosed.... Agent: Hewlett Packard Company

20080018312 - Control loop for switching power converters: A control loop for a clocked switching power converter where the loop features a comparator (44) and a filter (61) in series to linearize the nonlinear response of the comparator (44). The filter (61) has poles and zeros offsetting the poles and zeros of a bridge rectifier (M1 and M2).... Agent: James E. Eakin

20080018311 - Level shift circuit and switching regulator therewith: In a level shift circuit 2, an NMOS transistor Q5 with the gate and source thereof short-circuited together is provided between a high-voltage power line to which a voltage BOOT is supplied and the input end n of an inverter circuit composed of a PMOS transistor Q1 and an NMOS... Agent: Fish & Richardson P.C.

20080018313 - Power supply system using delay lines in regulator topology to reduce input ripple voltage: A power supply system for reducing input ripple voltage, the system including: a first switching regulator having at least two input pins, one input pin being a voltage input pin and another input pin being a synchronization input pin; a second switching regulator having at least two input pins, one... Agent: Cantor Colburn LLP - IBM Tuscon Division

20080018314 - Pwm control scheme under light load: A DC-DC converter capable of operating in a pulse-skipping mode for transforming power provided by a power generator for a load circuit includes a driving circuit for generating a gate driving signal according to a feedback signal and a pulse-skipping-mode control signal, a converter circuit for transforming power provided by... Agent: North America Intellectual Property Corporation

20080018315 - Constant current supply circuit: To provide a constant current circuit which is capable of not only acquiring characteristics of various sorts of electric circuits even before a trimming adjustment is carried out, performing the trimming adjustment based upon the acquired characteristics, performing trimming processes to both the constant current circuit and a load collectively,... Agent: Tadashi Horie

20080018316 - Non-linearity compensation circuit and bandgap reference circuit using the same: A non-linearity compensation circuit and a bandgap reference circuit using the same for compensating non-linear effects of a reference voltage are provided. In the non-linearity compensation circuit, the reference voltage is transformed into a temperature independent current. A current mirror mirrors the temperature independent current for biasing a bipolar junction... Agent: J.c Patents, Inc. Suite 250

20080018317 - Bandgap reference circuit: A bandgap reference circuit having a low sensitivity to temperature and supplied voltage installs a compensation circuit on a bandgap reference circuit to substitute a prior art that uses a resistor to match the circuit startup purpose and solve the problem of startup error caused by the manufacturing error. The... Agent: Patterson & Sheridan, L.L.P.

20080018319 - Low supply voltage band-gap reference circuit and negative temperature coefficient current generation unit thereof and method for supplying band-gap reference current: A low supply voltage band-gap reference circuit is provided, which includes a positive temperature coefficient current generation unit and a negative temperature coefficient current generation unit, and it is implemented by way of current summing. Through the current-mode temperature compensation technique, the present invention is able to reduce the voltage... Agent: J.c. Patents, Inc

20080018318 - Negative voltage generator: A negative voltage generator includes a current mirror unit, a control unit, a resistor, and a switching unit. The current mirror unit receives a first positive voltage from a first positive voltage source and a second positive voltage from a second positive voltage source and determines how to generate a... Agent: Birch Stewart Kolasch & Birch

20080018320 - Current balance arrangment: A current mirror arrangement comprising two transistors (11, 12) which are of different conductivity types and are each suitable for outputting a bias current (PBIAS, NBIAS) is specified. A controlled current source (13, 13′) is connected between the two transistors (11, 12) and forms the output of a current mirror... Agent: Fish & Richardson PC

20080018321 - Headroom compensation circuit for voltage converter: A headroom compensation circuit for a voltage converter for ensuring that there is adequate headroom voltage to enable accurate operation of the current sense amplifier sensing the output current of the converter, the headroom compensation circuit comprising an error amplifier for comparing an output voltage of the converter to a... Agent: Ostrolenk Faber Gerb & Soffen

20080012539 - Amplifier employing interleaved signals for pwm ripple suppression: An amplifier having improved distortion characteristics is set forth. The amplifier includes an interleaved PWM amplifier that generates interleaved PWM pulses in response to a modified input signal and one or more carrier signals. The interleaved PWM pulses of the amplifier are used to drive a power stage, such as... Agent: Brinks Hofer Gilson & Lione

20080012540 - Reverse current preventing circuit and method: A synchronous switching voltage converter has a first switch, a second switch, and an inductor, which are all coupled together to a switch node. A reverse current preventing circuit has a current detecting circuit, a voltage detecting circuit, a delay time adjusting circuit, and a blocking circuit. When an inductor... Agent: North America Intellectual Property Corporation

20080012541 - Voltage generator and power supply circuit: A voltage generator according to the present invention includes a reference voltage generator and a reference voltage determination circuit. The reference voltage generator outputs a detection current when generating a predetermined reference voltage by a passage of an electric current having a predetermined current value or higher. The reference voltage... Agent: Cantor Colburn, LLP

20080012542 - Dc-dc converter with over-voltage protection: A DC-DC converter includes a control circuit for generating a pulse width modulated signal based on a voltage of an output node. A first switch is connected to conduct during pulses, and a second switch conducts between pulses. The first switch is connected to an internal power node and the... Agent: Kirkpatrick & Lockhart Preston Gates Ellis LLP

20080012543 - Voltage regulator: A voltage regulator is disclosed that includes an output transistor outputting a current according to an input control signal to an output terminal; a control circuit part controlling the operation of the output transistor; a switching circuit part connecting the substrate gate and the gate of the output transistor to... Agent: Dickstein Shapiro LLP

20080012546 - Dc-dc converter: To present a DC-DC converter efficient in conversion and not requiring an external diode. The DC-DC converter includes a main NMOS transistor FET1 as a main switching device, a driver DVH1 for driving a gate terminal of the main NMOS transistor FET1, a capacitor C2 connected between a source terminal... Agent: Arent Fox LLP

20080012545 - Half bridge switching regulator and electronic device: A half bridge step-up switching regulator is configured including an output voltage adjusting switch element Q1 for adjusting an output voltage; a synchronous switch element Q2, connected in series with the output voltage adjusting switch element Q1, that is complementary ON operated when the output voltage adjusting switch element Q1... Agent: Oliff & Berridge, PLC

20080012544 - Methods and apparatus for providing an extremely fast response in switching power converters: A method is provided for accomplishing energy changes for a power converter to minimize an impact of a disturbance. The power converter includes energy storage and switches. The method comprises determining a nature of the disturbance, evaluating an amount of energy to be added or removed from the internal storage,... Agent: Sonnenschein Nath & Rosenthal LLP

20080007230 - Corrective device protection: A control system for an electrical power system includes an electrical corrective device, a voltage measuring device coupled to each phase of the electric power system, a current measuring device connected between each phase of the electric power system and the electrical corrective device, and a protective device connected to... Agent: Fish & Richardson P.C.

20080007231 - Low drop-out voltage regulator: A low drop-out DC voltage regulator regulates a voltage from a DC supply and includes: a pass device controllable to maintain a voltage at an output of the regulator and arranged to provide a first current from the DC supply, at least part of said first current being provided to... Agent: Seed Intellectual Property Law Group PLLC

20080007232 - 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 signal varying between the first and second voltages, and... Agent: Dickstein Shapiro LLP

20080007234 - Voltage regulator: D

20080007233 - Switching power supply circuit: A switching power supply circuit has a current mode control circuit including current detection means, and current mode signal generation means for generating a current mode signal being a drain current of a first MOS transistor obtained by supplying a first current information signal, which is an output signal of... Agent: The Webb Law Firm, P.C.

20080007235 - Switching power supply circuit: A switching power supply circuit comprises: current detection means for detecting a current flowing through an inductor; current holding means for holding the current flowing through the inductor over a past predetermined period; and current superposition means for adding to an output of an error amplifier a current superposition signal... Agent: The Webb Law Firm, P.C.

20080007236 - Power converter with segmented power module: According to an embodiment, a power converter system includes an output node at which an output voltage is provided. A segmented power module, coupled to the output node, has a plurality of segments. Each segment is implemented with a switch having a size which is different from the size of... Agent: Sidley Austin LLP

20080007237 - Switching power supply, electronic apparatus, and method of controlling switching power supply circuit: A switching power supply device may include a switching element for switching an input direct-current power, a smoothing section for smoothing and then outputting the direct-current power switched by the switching element, a square wave generating section for generating a square wave with a constant duty cycle to control switching... Agent: Lerner, David, Littenberg, Krumholz & Mentlik

20080007238 - Switching regulator: In a replica circuit, a potential simulating a waveform of current passing through an inductor is generated as a referential potential. A timing when the referential potential and an output potential become substantially the same as each other and a timing when the current passing through the inductor becomes substantially... Agent: Volentine & Whitt PLLC

20080007240 - Method and apparatus to control output power from a switching power supply: Techniques are disclosed to control output power from a switching power supply. A sample power converter controller circuit includes a control circuit coupled to be coupled to a switch. The control circuit includes a current sense circuit to be coupled to a primary winding of an energy transfer element coupled... Agent: Blakely Sokoloff Taylor & Zafman

20080007239 - Switching regulator: Provided is a switching regulator for preventing generation of an inrush current flowing through a switching element of an output stage, which is provided in the switching regulator. A soft start control circuit (116) detects a current flowing through a PMOS transistor (104) serving as a switching element of an... Agent: Brinks Hofer Gilson & Lione

20080007241 - Load compensated switching regulator: A load compensated voltage regulator comprises a chip including a control section having an error amplifier, a pulse width modulator (PWM), the PWM outputting at least one driver control signal. At least one driver has an input coupled to receive the driver control signal. An output stage includes at least... Agent: Akerman Senterfitt

20080007242 - Power supply circuit: A regulator for generating, from a first power supply voltage exceeding the breakdown voltage of a low voltage transistor block, a second power supply voltage lower than or equal to the breakdown voltage of the low voltage transistor block, includes an operational amplifier including low voltage transistors and high voltage... Agent: Mcdermott Will & Emery LLP

20080007243 - Reference voltage generation circuit: A reference voltage generation circuit of the present invention includes: a band gap reference-type current generation circuit for controlling each of currents flowing through a first current path and a second current path, which are extending from a first node to a second node, to be a predetermined reference current,... Agent: Mcdermott Will & Emery LLP

20080007244 - Electronic circuits and methods for starting up a bandgap reference circuit: An electronic circuit includes a bandgap reference circuit and a start-up circuit for starting up the bandgap reference circuit. The bandgap reference circuit includes at least one electric path having a semiconductor diode and a resistor connected in series with said semiconductor diode, wherein the voltage across the resistor is... Agent: Slater & Matsil LLP