Matches 1 - 50 out of 89 1 2 >
Match Document Document Title
7619400 Compact voltage step-up/step-down switching regulator  
This patent specification describes a switching regulator which includes a step-up/step-down unit configured to generate an output voltage by stepping up or down an input voltage in accordance with...
7612543 Current mode PWM boost circuit and feedback signal sensing method thereof  
A feedback signal sensing method includes the steps of: providing a pulse width modulation (PWM) signal having a period; charging a capacitor by a current source during a pulse duration of the...
7570032 Regulator with integrator in feedback signal  
A control device for a switching converter has an input terminal and an output terminal; the converter includes a half-bridge of a first and a second transistor coupled between the input terminal...
7548047 Pulse width modulated buck voltage regulator with stable feedback control loop  
A pulse-width modulated buck regulator includes a feedback control without having any external frequency compensation components to stabilize the feedback control loop irrespective of the reactive...
7514992 Circuit for generating precision soft-start frequency for either value of address bit applied to external reset pin  
A multi-function circuit has as single input/control pin, to which respectively different values of a control input may be applied. A multi-function signal generation section is coupled to the...
7479713 Systems and methods for reducing power dissipation in a disk drive including a fixed output voltage regulator  
A disk drive system includes a fixed output voltage regulator including an output terminal that provides a substantially fixed output voltage. A pluralities of loads are connected in parallel. A...
7439721 Constant-on-time power-supply controller and related system and method  
A constant-on-time power-supply controller includes an adder and a control circuit. The adder generates a sum of a sense voltage and a regulated output voltage generated by a filter inductor. The...
7408328 Information handling system including a power supply unit with a switching regulator that reduces transient load release  
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 switching power regulator. The switching...
7379284 Switching control circuit and self-excited DC-DC converter  
A self-excited DC-DC converter comprises a switching element that chops a direct-current input voltage; a smoothing circuit that smoothes the chopped voltage to generate a DC output voltage; a...
7375441 Systems and methods for dynamically affecting power dissipation in a disk drive including a fixed output voltage regulator  
A disk drive system includes a fixed output voltage regulator including an output terminal that provides a substantially fixed output voltage. A plurality of loads, each includes a voltage supply...
7230838 Active damping control for a switch mode power supply  
Methods and apparatus are disclosed for suppressing circuit noise due to parasitic elements in switch mode power supplies. The presented embodiments use actively controlled damping devices such as...
6995483 Synchronous buck and boost regulator power reduction circuit using high side sensing  
A synchronous DC-DC regulator, adapted to receive a high side pulsed signal and a low side pulsed signal that is substantially the inverse of the high side pulsed signal. The regulator includes an...
6927986 Power supply and PWM circuits  
A PWM circuit is provided that is capable of PWM control with duties in a range of 0-100%, and that is also capable of high-speed responses.
6917190 Power supply apparatus varying an output constant voltage in response to a control signal from a load circuit  
A power supply apparatus includes an output voltage generator, a reference voltage generator, a voltage divider, and a voltage control circuit. An input voltage is supplied from a direct current...
6906499 Current mode bang-bang controller in a switching voltage regulator  
A regulator provides a load voltage. The regulator includes a power driver having a feedback input and a power driver voltage. The regulator includes a comparator having a comparator output related...
6512353 Synchronized, ripple independent window comparator for switch-mode power converters  
This invention synchronizes the control signals generated by the out-of-range detection circuits with a predefined event. In one aspect, the invention relates to a method of controlling a switching...
6486645 Voltage regulation circuit and related methods having a dynamically determined minimum discharge time  
A circuit and method for providing a regulated output voltage. In one embodiment, the circuit includes a feedback comparator, a latch module, a switch, a current limit module and a pulse module....
6483278 Method and power supply device for generating regulated D.C. voltage from A.C. voltage  
A method and power supply device for generating a regulated direct voltage from an alternating voltage using a step-down transformer, a step-up transformer, an inductance coil and a control device...
6377034 Method and circuits for inductor current measurement in MOS switching regulators  
An inductor current measurement circuit ( 25 ) accurately measures current supplied to an inductor ( 17 ) by a first transistor ( 2 ) and/or a second transistor ( 3 ). The first transistor ( 2 )...
RE37609 Voltage regulator that operates in either PWM or PFM mode  
A switching voltage regulator achieves high efficiency by automatically switching between a pulse frequency modulation (PFM) mode and a pulse-width modulation (PWM) mode. Switching between the...
6320359 DC-DC converter and controller for detecting a malfunction therein  
A DC-DC converter includes a main switching device and a synchronous switching connected in series between a power supply and a ground, and a drive control circuit for supplying a first drive...
6157182 DC/DC converter with multiple operating modes  
A comparator monitors an output voltage V out . When an output voltage V out decreases to a predetermined output voltage or less, the comparator sends a signal that represents this state to a...
6121762 Non-isolated low voltage switch-mode power supply  
A non-isolated voltage converter, of switch-mode type, includes a capacitor between terminals that provide an output voltage regulated by a circuit that controls a switch that provides current to...
5959443 Controller circuit for controlling a step down switching regulator operating in discontinuous conduction mode  
A controller circuit for controlling and continuously varying the average value of discontinuous current pulses in a step down switching regulator operating in discontinuous conduction mode effects...
5869955 Apparatus and method for displacing noise on a signal from the detection threshold of an electronic controller  
An adapter designed to connect a dc to dc power converter between a dc power supply and an electronic sensor that provides inputs to an electronic controller. The dc to dc power converter...
5777503 Pulse width modulation bias to minimize effect of noise due to ramp switching  
A control system using pulse width modulation, current-mode control to regulate a flyback converter for small input currents. The control system generates a ramp voltage indicative of an input...
5696439 Fuzzy control process for switching power supplies, and device for performing it  
A process for the fuzzy control of switching power supplies which have at least one inductor and at least one switching device, and a device for performing this control, the particularity whereof...
5627740 Low dissipation current sensing system for a switched DC power supply  
A system and method for measuring the load current in a power supply driven by switched transformer or the like. Rectified rectangular waveform input voltage pulses are interrupted to exhibit a...
5612610 DC-to-DC converter operating in a discontinuous mode  
A converter employs a comparator sensing the current through an output diode, for generating a confirmation signal of an OFF state of the switch until the discharge current of the inductor toward...
5610503 Low voltage DC-to-DC power converter integrated circuit and related methods  
A dc-to-dc converter circuit for generating an output voltage from a source voltage includes a plurality of first metal oxide semiconductor field effect transistors (MOSFETs) connected in parallel...
5592071 Method and apparatus for self-regeneration synchronous regulator  
A synchronous regulator circuit including a transformer having a secondary inductor magnetically coupled to a primary inductor, where the secondary inductor is coupled to control a synchronous...
5534769 Synchronous rectifying circuit  
A synchronous rectifying circuit for a switching power supply is disclosed which is arranged such that the necessity to provide a diode element in parallel with a rectifying transistor is...
5508602 Voltage boosting circuit with load current sensing  
A power supply in which control of the switch-on instant of a power device of a boost-circuit (operating in a discontinuous mode) is implemented by monitoring the current which actually flows...
5495164 Boost converter  
A boost converter having a plurality of boost converter units in parallel operation. Within each boost converter unit, current transformers 22,23 are connected in series respectively to switching...
5438505 Adaptive control method for power converters  
Adaptive control of converters is provided to achieve, in one case, a constant current characteristic by controlling input power as a function of the ratio of output voltage to output current. In...
5134537 Negative voltage clamp circuit for controlling currents in inductive loads  
A circuit capable of driving inductive loads below a chip substrate voltage level while minimizing on-chip power dissipation and eliminating parasitic effects. Two negative voltage drive modes are...
4930040 Current regulator for inductive loads  
A current regulator for an inductive load especially for a coil of an electromagnetic solenoid valve. The current flow through the coil is regulated and compared by means of an operational...
4875001 Electronic switching power supply with a choke converter  
The variation of the time (t2) in which current flows from the chock (n1) of the switching power supply to the load (C3, RL), which variation is necessary for the regulation of the output voltage...
4866367 Multi-loop control for quasi-resonant converters  
A multi-loop controller for controlling a quasi-resonant converter having a power switch, a filter inductor and an output voltage. The controller includes a sensor circuit for sensing the output...
4853837 Synchronous switching power supply with flyback converter  
The synchronous switching power supply can be employed in power supply system requiring multiple outputs and extremely high efficiency. The input signal may be AC or pulsating DC. A switching power...
4792887 Regulated rectifier d.c. power supply  
A control circuit for controlling a known active harmonic filter operating as a step-up converter in a power supply with sinusoidal network current input and a power factor of almost unity. The...
4789818 DC voltage converter  
A DC voltage converter comprising: a switching transistor for establishing a load current circuit which connects a DC power source to a load to supply a load current to the load; a differentiating...
4767978 Hybrid switching circuit in a DC to DC converter  
In the preferred and illustrated embodiment of a DC to DC power converter in a sonde and exposed to high temperatures, a transformer with primary and secondary provides AC to a full wave rectifier...
4766281 Pulse generator spark-erosive metal working  
A pulse generator for spark-erosive metal working contains a charge regulator circuit for charging a storage capacitor. A storage capacitor is sinusoidally discharged across a switching device to a...
4734636 Resonant switching regulator  
A solid state switching regulator is disclosed whereby rectified line voltage, and current is converted by the switching action of On and Off switching elements to produce a regulated voltage...
4727308 FET power converter with reduced switching loss  
A DC to DC power converter having reduced switching loss for operation at high frequencies. As disclosed, a buck, or forward, converter includes a first FET as the switching device in series with...
4681997 Wire-cut, electric discharge machining power supply unit  
A wire-cut, electric discharge machining power supply unit charges a capacitor (4) by a DC power source (2) via a switching element (1), and discharges the stored charges of the capacitor (4)...
4668905 Current monitor for switching regulators  
A circuit arragement for monitoring current in a switching converter, wherein an inductance is charged pulse-wise with a current via a power switch. In accordance with the invention, the mean value...
4634943 Control device for a direct current semiconductor regulator  
An inductive load 1, more specifically a direct current motor, is fed by a direct current source through a semiconductor regulator which contains two parallel switching controllable semiconductor...
4633094 Electronic switching apparatus  
The invention relates to a changeover discharge circuit for an electronic switching circuit of the type having a semiconductor switching element in series with a DC source and an inductive load....
Matches 1 - 50 out of 89 1 2 >