Matches 251 - 300 out of 337 < 1 2 3 4 5 6 7 >
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4774649 Integrated magnetic resonant power converter  
A resonant power converter is disclosed which is constructed on an integrated magnetic core, with primary, secondary and tertiary windings occupying separate legs of the core. The tertiary winding...
4772810 Apparatus for non-dissipative switching transistor snubber  
A high efficiency non-dissipative snubber circuit suitable for most power supplies used in international markets is disclosed. Circuit uses diode-capacitor-inductor structure to capture input...
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...
4768141 D.c.-a.c. converter having an asymmetric half-bridge circuit  
The invention relates to a d.c.-a.c. converter with an asymmetric half-bridge circuit (1) that has an energy-storing component (6). The controllable switching means (2, 5) of the asymmetric...
4763237 DC/AC/DC Power conversion system including parallel transformers  
A power conversion apparatus are disclosed, each having a pair of transformers, each operating in transforming and rebiasing modes, whose primaries are joined in parallel and are alternately...
4760512 Circuit for reducing transistor stress and resetting the transformer core of a power converter  
A single ended forward converter includes a snubber/reset circuit that diverts current flow from the power switching transistor during the turn off transition to significantly reduce switching loss...
4739461 Power supply device for providing positive and negative DC voltages on the secondary of a transformer  
A power supply device capable of supplying high DC voltages of positive and negative polarities has a transformer having a primary coil and two secondary coils. A DC current supplied to the primary...
4736285 Demagnetization circuit for forward converter  
A demagnetization circuit for use with a forward converter includes a drive winding magnetically coupled to the primary winding of the forward converter, a capacitor for absorbing leakage and...
4736284 Switching power supply circuit including forward converter  
In a switching power supply circuit, a forward converter includes first to third switching transistors and a switching transformer having first and second primary windings. The first to third...
4731803 Circuit for operating an X-ray tube  
A circuit for operating an X-ray tube, such as in a medical diagnostics apparatus, is connected with a high-voltage generator and a switch mechanism for connecting and disconnecting the X-ray tube...
4731719 Current boosted switching regulator  
A switching voltage regulator circuit is provided which regulates an input voltage to an output voltage of lesser magnitude, and which supplies an output current greater than the current through...
4725768 Switching regulated power supply employing an elongated metallic conductive inductor having a magnetic thin film coating  
An inductor and a switching means are combined in such a way that the storage of the energy in the inductor and the release of the energy stored in the inductor are repeatedly carried out, whereby...
4712160 Power supply module  
Disclosed herein is a power module which is simple in assembly and which allows efficient release of heat generated by a converter transformer and power devices on primary and secondary circuits...
4709319 Power supply device  
There is disclosed a high-voltage power supply device capable of high precise control with a simplified circuitry and with a reduced energy loss in which a high-voltage transformer is controlled by...
4704674 Power feed apparatus for load having reverse blocking characteristics  
A power feed apparatus in which a means for by-passing the current reversely biasing the load is used for the normally used rectification means when the power converted by the transformer is fed to...
4688157 Switching circuit using a fast diode and provided with means for damping oscillations on opening  
The invention relates to switching circuits using fast rectifier diodes. To damp the oscillations liable to occur at the time when the fast diode passes from a conducting state into a blocked...
4682093 Power supply systems for inductive elements  
In a power supply system, an inductance L is connected between a rail at a voltage V 1 and a rail at earth through a switch S. When the switch is opened, a current i 2 flowing from the inductance...
4675796 High switching frequency converter auxiliary magnetic winding and snubber circuit  
An integrated magnetic assembly for use in the direct current output circuit of a high frequency electronic switching power supply, comprising magnetic core sections for the output transformer and...
4674019 Transformer-coupled two-inductor buck converter  
A transformer-coupled two-inductor buck converter is provided which comprises a series input circuit including an input inductor, a capacitor and a grounded inductor. The input and grounded...
4672517 Switched power supply of the forward converter type  
A transformer isolated switched power supply of the forward converter type in which a small bias winding is provided on the transformer so that both sides of the operating area of the B/H curve of...
4660134 DC-DC converter with chopping switch and transformer  
A DC-DC converter is provided, for example of the voltage booster type, comprising a switch controlled for chopping the input signal, a transformer whose primary winding receives the chopped signal...
4639663 Fly-back transformer with reduced ringing  
A fly-back transformer to be used for use in the supply of a DC high voltage into a cathode-ray tube such as TV image receiving machine or the like. The ringing removing wire connected with the...
4625270 RFI suppression technique for switching circuits  
A switching type power supply includes neutralizing circuitry to counteract current flow to equipment ground due to generated RF currents. This neutralizing circuitry includes an added transformer...
4609981 Direct current converter for switched mode power supply  
The converter comprises an output transformer (T1) through which pass trapezoidal current waves. The primary winding (A0) is supplied under the control of two control circuits (P1, P2), each...
4609980 Switching power supply with transistor drive circuit  
A switching power supply that comprises a base drive transformer, a switch device connected to one end of the transformer's primary winding, and a transistor having its base connected to one end of...
4607319 Flyback DC/DC converter with low ripple in the output capacitor  
A flyback type DC/DC converter includes an input filter with input capacitor (C 1 ), an inductance (L) in series with a power transistor (T) and an output filter with an output capacitor (C 2 )....
4541112 Electroacoustic transducer system  
An electroacoustic transducer system comprises a microphone working into a low-frequency amplifier for the energization of an a-c load such as, for example, a loudspeaker or a volume indicator at a...
4524412 Peak current controlled converter with additional current threshold control level to limit current tailout during overload conditions  
A power converter circuit, which is voltage-regulated and current-limited by a peak current control circuit, significantly reduces the current tailout effect by decreasing the frequency of...
4518941 Pulse transformer for switching power supplies  
A pulse transformer for use in a switching power supply having primary and secondary windings wound concentrically around a common core and two electrostatic shield foils interposed between the...
4513360 DC-DC converter having energy storage inductance element connected in flywheel circuit  
In a DC-DC converter of the type in which an inductance stores energy when a main switching transistor is turned on and releases the stored energy when the main switching transistor is turned off,...
4507721 DC-DC Converter for remote power feeding  
A floating type DC-DC converter for remote power feeding is connected via a power separating filter to a signal line on which an AC signal is superimposed on DC power. The DC power separated by the...
4485431 DC-DC Converter  
A DC-DC converter in which a DC voltage is intermittently applied to a transformer through a switching circuit performing repeatedly turning on-off operations. An offset is imparted to the voltage...
4456835 Method of operating a load from alternating current mains and circuit arrangement therefor  
In the disclosed circuit arrangement for operating the load from alternating current lines, an inductance connected to the load serves as a first energy store. A first control switch switches the...
4443839 Single ended, separately driven, resonant DC-DC converter  
A single ended, separately driven, resonant DC-DC converter including a transformer, a capacitor connected in parallel with a primary winding of the transformer, a switching transistor connected...
4438485 Efficiency switching-mode power supply  
A switching-mode, blocking oscillator based power supply employs proportional base drive and an improved design of rise-time suppression to improve effeciency and reliability. Current limiting...
4429186 Floating battery feed circuit for telephone subscriber line interface  
An arrangement for providing a subscriber line with an operating potential. The energy to the line is transferred thereto inductively at a fixed frequency and includes the rectification means on...
4423476 d.c. Blocking oscillator charging device for electric vehicles  
A charging device for traction batteries of an electric vehicle consists of a converter module with at least two d.c. blocking converters, each including a control power transistor, a cutoff relief...
4417153 High frequency switching circuit  
A single-ended switching circuit is constituted by a primary winding of a transformer, a switching circuit connected between the primary winding and a DC power supply and on-off operated with a...
4386394 Single phase and three phase AC to DC converters  
A single phase AC to DC power converter is provided which accepts a single AC line input voltage and provides a DC output voltage. Input current feedback is used to control the converter and to...
4377842 Flyback voltage control  
Flyback power supply with secondary circuit damping during primary charging. This reduces the induced or reflected oscillations into the primary circuit and superimposition onto the primary current...
4370701 Energy conserving drive circuit for switched mode converter utilizing current snubber apparatus  
An energy conserving drive circuit is provided for switched mode power converters having a transformer with primary current controlled by a main power switch whose conduction is in turn controlled...
4365171 Low loss snubber circuit  
An improved snubber circuit for a bipolar switching transistor connected to drive an inductive transformer load comprises a first resonant circuit connected to the driven winding of the transformer...
4363067 Transistor chopper protection circuit  
A circuit for protecting the transistor of a high current transistor chopper from damage due to inductive energy stored in the chopper circuit when the transistor is biased nonconductive. The...
4356541 Rectifier  
A rectifier in which a semiconductor active element, which is a rectifying element, and a diode are connected in parallel in the same direction so that the degradation in rectifying efficiency due...
4323840 Switching mode regulator  
A switching mode regulator of improved efficiency and reliability is described in which both the turn-on and turn-off transients are controlled. In switching mode regulators, a flyback diode turns...
4302803 Rectifier-converter power supply with multi-channel flyback inverter  
An AC to DC power supply having a multi-channel, flyback inverter output section regulated via a fixed frequency, pulse width modulation controller. The controller indirectly regulates each channel...
4281372 Power supply for magnetron and the like loads  
A flyback-type high-frequency, high-voltage power supply for energizing a self-rectifying load, such as a magnetron microwave power generator for a microwave oven and the like. A switching device...
4277824 Start-up circuit  
A start-up circuit includes a capacitor which is initially charged by the AC line voltage. When the voltage across the capacitor is sufficient to breakdown a zener diode and overcome the gate to...
4274133 DC-to-DC Converter having reduced ripple without need for adjustments  
A switching dc-to-dc converter employs inductance in series with the source to form an input circuit, and in series with the load to form an output circuit. Suitable switching means alternately...
4268898 Semiconductor switching circuit with clamping and energy recovery features  
A circuit for holding the voltage across a rapidly switched semiconductor element such as a transistor used in an inductive circuit to substantially twice the voltage of an input source when the...
Matches 251 - 300 out of 337 < 1 2 3 4 5 6 7 >