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7414383 Multi-phase voltage regulator with phases ordered by lowest phase current  
While firing a number of phases of a multi-phase switching voltage regulator in a sequence, a determination is made as to which one of the phases has the lowest phase current. Then, the next phase,...
7405551 Method and an apparatus to adjust duty cycle for voltage supply regulation  
A method and an apparatus to regulate voltage supply have been disclosed. In one embodiment, the apparatus includes a power converter block to generate an output voltage from an input voltage and a...
7405550 Control input circuit for an electrical device  
A control input of an electrical device is disclosed, which is resistant to parasitic currents and which is especially suitable for a large bandwidth of various driving voltages. For this purpose,...
7402960 LED-based lamp apparatus  
A LED-based lamp apparatus includes a LED unit having multiple LEDs connected in series, a step-up circuit for stepping up a power supply voltage by a switching action of a switching element to...
7400125 Power supply circuit with series regulator  
A series-regulator type of power supply circuit is provided. In the circuit, the emitter and collector of a transistor are connected to power input/output terminals. A control circuit controls a...
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...
7391190 Apparatus and method for three-phase buck-boost regulation  
A buck-boost converter is provided. In buck-boost mode, the converter operates in at least three phases. In one phase, the inductor current ramps upward. In another phase, the inductor current...
7391189 Step-up/down DC-DC converter  
A step-up/down DC-DC converter is disclosed that includes: a step-up/down part generating an output voltage by stepping up or down an input voltage; and a control part generating an error signal...
7388355 Voltage regulator  
When the control signal EN is changed to “H”, a reference voltage VR is generated by a reference voltage generator 10 , and a bias voltage BL is generated by the bias circuit 20 . Based on...
7382114 PFM-PWM DC-DC converter providing DC offset correction to PWM error amplifier and equalizing regulated voltage conditions when transitioning between PFM and PWM modes  
To prevent a voltage glitch in the regulated DC output voltage of a PWM/PFM DC-DC converter when switching between PFM and PMW modes, the error amplifier of the converter's PWM regulation path is...
7375471 Charging circuit  
A charging circuit has a battery 12 , switching element 14 , and resistor 16 for current detection arranged on the primary side of transformer 10 . Diode 18 and capacitor 20 for storing...
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...
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...
7365451 Power converter  
A power converter that can continue to operate after suffering a partial failure. The power converter includes multiple array transformers; normally-on switches connected respectively in series...
7358468 Complex home appliance and method of controlling and installing the same  
A complex home appliance and a method of controlling and installing the same. The complex home appliance includes a single power supply unit shared by two or more component home appliances of the...
7356718 Semiconductor memory circuit and method for operating the same in a standby mode  
A semiconductor memory circuit having a controller by means of which the semiconductor memory circuit can be switched into a standby mode with a reduced power requirement, comprises an analog...
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...
7353408 USB (Universal Serial Bus) interface device  
A USB connector cable includes a main cable having four separately formed wires, namely, a voltage wire, a first data transmission wire, a second data transmission wire and a ground wire, and a...
7342387 System and method for providing a highly efficient wide bandwidth power supply for a power amplifier  
A system and a method are disclosed for providing a highly efficient wide bandwidth power supply for a power amplifier. A power supply control circuit of the invention comprises a wide bandwidth...
7339361 Multi-phase DC-DC converter using auxiliary resistor network to feed back multiple single-ended sensed currents to supervisory controller for balanced current-sharing among plural channels  
A multi-phase DC-DC converter incorporates auxiliary resistor networks to feed back to the converter's supervisory controller voltages representative of secondary sensed currents associated with...
7339360 Switching voltage regulator with an improved range of input voltage  
A switching voltage regulator has a first switch, a second switch, and an inductor, which are coupled together to a switch node. A switch control system applies a drive signal for controlling the...
7336059 System and method for charging and discharging a superconducting coil  
A system and method for charging and discharging a superconducting coil. The system comprising a boost converter coupled between a low-voltage bus and a high voltage bus, and a buck converter...
7332899 Circuit arrangement for monitoring a voltage supply, and for reliable locking of signal levels when the voltage supply is below normal  
A circuit arrangement for monitoring an external voltage supply (VBAT 1 , VBAT 2 ) and for reliable locking of a signal (Z 2 ), which is emitted from a logic circuit ( 8 ), at a voltage level (VDD,...
7327127 Pulse-frequency mode DC-DC converter circuit  
A step-down switching voltage regulator may operate in PFM mode based on peak current sense without requiring an external diode. The regulator may comprise a PMOS transistor and an NMOS transistor...
7327126 Diode circuit  
A diode circuit includes a differential circuit having a first MOS transistor whose source is connected to a first input terminal, a second MOS transistor whose source is connected to a second...
7315152 System for detecting current in an output stage of a power amplifier  
A system for detecting current in an output stage of power amplifier circuitry in a transmitter of a mobile terminal is provided. In general, the mobile terminal includes power amplifier circuitry,...
7309975 Process for operating a switching power supply  
There is provided a process for operating a switch mode power supply circuit (Switcher) connectable to a load, the circuit having a first buck switch, a second boost switch and an inductor in a...
7307407 Power supply apparatus  
In a power supply apparatus, in a standby mode, control signals for controlling a first MOSFET of a power supply apparatus to be turned on and a second MOSFET to be turned off are supplied to the...
7292016 Buck/boost DC-DC converter control circuit with input voltage detection  
A semiconductor device has a DC-DC converter control circuit for selectively carrying out a boosting operation and a deboosting operation in accordance with a value of a power supply voltage...
7274577 Electronic instrument having booster circuit  
Provided is an electronic instrument in which a starting voltage of a power supply is less than a starting voltage of a general booster circuit, and which is capable of starting efficiently. The...
7274173 Power control circuit for charge storage element  
A DC voltage source, a switch, and an inductor are connected together in series. The inductor is also connected together with a switch, a piezoelectric element in series. Moreover, the switches are...
7271573 Low loss DC/DC converter including a multi-level controller that applies a monotonic sequence of voltage levels  
A direct current to direct current converter includes first and second switches to output voltages on first and second output terminals in response to appropriate turn-on voltages at first and...
7265525 Self-driven scheme for synchronous rectifier having no body diode  
A voltage converter uses a component such as a JFET or four-terminal power MOSFET having no body diode and exhibiting no body diode conduction characteristic as a synchronous rectifier to reduce...
7262583 Apparatus for providing regulated power to an integrated circuit  
A regulator system for supplying power to a microelectronic device is disclosed. The system includes an array of a plurality of regulators, where each regulator provides a portion of power required...
7248030 Circuit and method for controlling step-up/step-down DC-DC converter  
A step-up/step-down DC-DC converter for reducing loss caused by activation and inactivation of transistors. An error amplifier included in a control circuit generates an error signal in accordance...
7245113 High light load efficiency synchronous buck regulator with pulse skipping control  
A voltage regulator includes a voltage source for providing an input voltage and circuitry for regulating the input voltage to provide an output voltage. The circuitry for regulating the input...
7242171 Power converter circuit and method for power conversion  
The present invention provides an improved form of inverter circuit which refines the known conventional circuit to reduce its offset and then uses a combination of this refined circuit and a...
7242168 Wide input range buck/boost switching regulator  
A low-cost, wide input range, DC-DC voltage-switching converter regulator device for supplying power to various components in an automotive application includes two pairs of serialized switch...
7221132 Power supply circuit  
A power supply circuit relating to the present invention comprises a differential amplifier for feeding out a voltage as a control voltage in accordance with a difference between a feedback voltage...
7221130 Switching power converter employing pulse frequency modulation control  
A method for controlling a switching power converter provides an efficient algorithm for controlling the output voltage across loads that are relatively light with small transients. When the output...
7215102 Semi-clockless, cascaded, current-mode power regulator having high noise immunity and arbitrary phase count  
A semi-clockless, cascaded, current-mode regulator has a first regulator that receives a clock signal from a controller. By ‘semi-clockless’ is meant that a clock signal is applied to the first...
7209518 Higher PWM resolution for switchmode power supply control  
A pulse width modulation controlling circuit for a power supply and method for controlling a switchmode power supply is disclosed. The present invention accomplishes control over the switching of...
7208926 Switching signal modulation circuit  
A switching signal modulation circuit includes a switching control circuit having an ON time control terminal and an OFF time control terminal, the switching control circuit capable of adjusting...
7208924 Semiconductor integrated circuit device  
The invention intends to provide a technique that achieves a sufficient phase margin with ease. The circuit includes a power supply circuit that is formed with a phase compensating resistor and a...
7205751 Enable and disable of diode emulation in a DC/DC converter  
A method of enabling and disabling diode emulation for a DC/DC converter which generates an output voltage including detecting a diode emulation request signal indicative of enabling or disabling...
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...
7199563 DC-DC converter  
The object of this invention is to improve efficiency in the step-up/down mode and eliminate ringing in the output voltage when switching between the step-up mode and the step-up/down mode. This...
7187157 Power supply remote voltage sensing  
In accordance with an embodiment of the present invention, two transistors are simultaneously controlled by a controller to control the application of power to a load and monitor a voltage level at...
7181321 Method and device for operating a multiple component technical system, particularly a combustion system for producing electrical energy  
In a technical system a plurality of values associated respectively with a component are stored in at least one computer unit. The computer unit is enabled to trigger an evaluation of at least one...
7180277 Capacitor start-up apparatus and method with fail safe short circuit protection  
Electronic circuits couple energy storage devices, such as double layer capacitors or rechargeable battery cells, to a power supply output, thereby improving noise suppression and extending...
Matches 1 - 50 out of 335 1 2 3 4 5 6 7 >