Quotables
"One of the greatest labor saving inventions of today is tomorrow!"
Vincent T. Floss
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8159843 | Method and apparatus to regulate an output voltage of a power converter at light/no load conditions An example apparatus to regulate an output voltage of a power converter at light/no load conditions includes a driver circuit, a feedback circuit, and an adjustable voltage reference circuit. The driver circuit is coupled to output a drive signal to switch a power s... | 04/17/2012 |
| 8130517 | Forward converter transformer saturation prevention A power converter in one aspect limits the magnetic flux in a transformer. A control circuit included in the power converter includes a pulse width modulator, logic circuits and saturation prevention circuits. The saturation prevention circuits assert a first signal... | 03/06/2012 |
| 8120933 | Power converter with reverse recovery avoidance A power converter includes a reverse-recovery avoidance scheme. The power converter may include deliver current from a direct current (DC) power source to an alternating current (AC) load. A first switch and second switch of the power converter may be operated to su... | 02/21/2012 |
| 8111530 | 3-level power converter A 3-level power converter is provided, which is reduced in size of the converter, reduced in floating inductance of each of wirings interconnecting between respective elements, and easily attached with a snubber circuit. The 3-level power converter performs on/off c... | 02/07/2012 |
| 8009447 | Energy effective switching power supply apparatus and an energy effective method thereof An energy effective switching power supply apparatus and an energy effective method thereof. The energy effective switching power supply apparatus includes a power transforming part having first and second coils to induce a voltage to the second coil using interacti... | 08/30/2011 |
| 7995362 | High voltage full bridge circuit and method for operating the same A circuit apparatus for providing an AC voltage to a load. The apparatus may include: a first, second, third and fourth switch, wherein the first switch is connected between a first node and a first terminal of the second switch and the fourth switch is connected be... | 08/09/2011 |
| 7983062 | Minimum on-time reduction method, apparatus, and system using same The present invention discloses a minimum on-time reduction method for a switching power conversion, comprising the steps of: generating a first reset signal and an over-supply pulse signal according to a current sensing signal and a reference signal; generating a b... | 07/19/2011 |
| 7974111 | DC/DC converter and semiconductor device using DC/DC converter It is an object to provide a DC/DC converter that can stabilize power supply potential in use. It is another object to provide a semiconductor device in which circuit operation is stabilized. In addition to a power supply that supplies potential to be reference pote... | 07/05/2011 |
| 7952898 | Forward converter transformer saturation prevention A control circuit for use in a power converter in one aspect limits the magnetic flux in a transformer. Controlled current sources produce a first current that is proportional to an input voltage of the power converter and a second current that is proportional to a ... | 05/31/2011 |
| 7859869 | Forward converter transformer saturation prevention A control circuit for use in a power converter in one aspect limits the magnetic flux in a transformer of a switching power converter. A first controlled current source has a first current that is substantially directly proportional to an input voltage to be applied... | 12/28/2010 |
| 7839665 | System interconnection inverter including overvoltage and negative voltage protection A system interconnection inverter includes a step-up converter and an inverter. Moreover, the system interconnection inverter includes a short-circuit current-interrupting diode with a cathode connected to an input terminal of a negative bus, a semiconductor switch ... | 11/23/2010 |
| 7778054 | Power switching circuit improved to reduce loss due to reverse recovery current In a power switching circuit, a second commutation member has a second commutation path electrically connected in parallel to a first commutation path and a second diode provided in the second commutation path and electrically connected antiparallel to a semiconduct... | 08/17/2010 |
| 7663896 | Energy effective switching power supply apparatus and an energy effective method thereof An energy effective switching power supply apparatus and an energy effective method thereof. The energy effective switching power supply apparatus includes a power transforming part having first and second coils to induce a voltage to the second coil using interacti... | 02/16/2010 |
| 7602623 | Apparatus, system, and method for a low cost self-healing power supply An apparatus, system, and method are disclosed for a low cost self-healing power supply. The invention includes a power supply that regulates a direct current (“DC”) regulated bus to maintain a regulated bus voltage under varying load conditions. The power suppl... | 10/13/2009 |
| 7558090 | System for transferring an alternating voltage into a direct voltage A system for transferring an alternating voltage into a direct voltage includes a rectifier, a filter, a transformer, a switch, a switch control circuit and a voltage feedback circuit. The rectifier connects to a main power supply device and rectifies the alternatin... | 07/07/2009 |
| 7489530 | High voltage full bridge circuit and method for operating the same Switches (such as FET's and other devices) are often used in circuits to generate an AC signal from a DC supply input. There are times when the supplied DC voltage is greater than desired for the ratings of the switches that can or must be used. There are also times... | 02/10/2009 |
| 7443699 | Negative current compensation method and circuit A power supply controller (10, 60, 70) uses a negative current (36) of a power transistor (16, 71) to detect the valley point for enabling the power transistor when driving an inductor (17). The negative current occurs when the inductor i... | 10/28/2008 |
| 7436686 | Reconfigurable voltage inverter with tolerance to failures Voltage inverter provided with four switching cells (Q1 to Q4) to be connected to the terminals of a DC voltage source (Vdc), each comprising two semiconductor switches (I11, I12, I21, I22, I31, I32, I41... | 10/14/2008 |
| 7405954 | Method and apparatus for conditional response to a fault condition in a switching power supply Techniques are disclosed to regulate an output of a power converter. One example power converter controller circuit includes a line sense input to be coupled to receive a signal representative of an input voltage of a power converter. A feedback input is included an... | 07/29/2008 |
| 7397676 | Class E amplifier with inductive clamp A power supply including an inverter receiving a DC input signal from a DC input source (11). The inverter is implemented as a single-ended inverter. Each inverter is driven by a signal source (13A, 13B), which outputs an AC signal. The output f... | 07/08/2008 |
| 7385831 | Power supply device and vehicle lamp A power supply device includes: a regulator transformer; a primary switch for selectively supplying a current to the regulator transformer; a control circuit for reducing to 0, following each election made at the primary switch, the minimum value of a current output... | 06/10/2008 |
| 7369420 | Control circuit for isolated forward DC-to DC converters An isolated DC-to-DC converter comprises a converter section configured to receive an input voltage and produce an isolated output voltage and a controller section configured to control the operation of the converter section to maintain the output voltage at a prede... | 05/06/2008 |
| 7362182 | Power amplifier A radio frequency power amplifier including control electronics for providing control signals for timing of the power amplifier. A first group of the drivers are coupled to the control electronics and a second group of drivers are coupled to the control electronics.... | 04/22/2008 |
| 7353771 | Method and apparatus of providing power to ignite and sustain a plasma in a reactive gas generator According to a first aspect, a power supply and a method of providing power for igniting a plasma in a reactive gas generator is provided that includes (i) coupling a series resonant circuit that comprises a resonant inductor and a resonant capacitor between a switc... | 04/08/2008 |
| 7352544 | Method and apparatus for providing a remedial strategy for an electrical circuit A method and electrical circuit for dynamic reconfiguration of a DC-to-AC inverter comprising first and second power rails where each the rails has a power source. The method comprises monitoring the first and second power rails for short-circuit failure; and upon f... | 04/01/2008 |
| 7342758 | Method and system for detecting stand-alone operation of a distributed generating system A method and a system for detecting stand-alone operation of a distributed generating system having a generating source connected in shunt with an independent power distribution system via a first branch breaker are proposed. A voltage or a frequency signal on the i... | 03/11/2008 |
| 7342811 | Lossless clamp circuit for DC-DC converters A lossless clamping circuit for use in a synchronous rectifier DC-DC converter in which at least one transistor switch (MOSFET) periodically connects two terminals of an output transformer winding across a main output and return terminal to provide a DC current at a... | 03/11/2008 |
| 7342391 | Power supply device and switching power supply device In a driver circuit constructing a switching power supply device that switches power transistors passing a current through a coil by a PWM mode, a current detection transistor, which is smaller in size than the low-potential side power transistor, and a current dete... | 03/11/2008 |
| 7336508 | Switching power source apparatus with voltage gate detector for the switch A switching power source apparatus has a switching element Q1. Between terminals of the switching element Q1, there is parasitic capacitance (C1, C2). A voltage V4 of parasitic oscillation appears at a gate of the switching element... | 02/26/2008 |
| 7313008 | Converter circuit for producing low harmonics A converter circuit is specified for at least one phase (R, Y, B), which converter circuit has a first switching group system which is provided for each phase (R, Y, B) and has a first main switching group which is formed by a power semiconductor switch and by a cap... | 12/25/2007 |
| 7310251 | Control circuit having two-level under voltage lockout threshold to improve the protection of power supply The invention presents a switching power control circuit including two levels of under voltage lockout to improve the protection of the power supply. An input terminal of control circuit is connected to a supplied capacitor to supply the power of the control circuit... | 12/18/2007 |
| 7310253 | Power conversion circuit control apparatus This invention provides a power conversion circuit control apparatus which rapidly detects the voltage amplitude and phase of each phase, corrects the output of a current controller by the mean voltage amplitude and mean phase, and corrects, on the basis of the volt... | 12/18/2007 |
| 7304633 | Inverter device, liquid crystal display device using the inverter device, and method of monitoring lamps of the liquid crystal display device using the inverter device An inverter device for a liquid crystal display includes a transformer for receiving an inverter drive voltage, converting the received drive voltage into an AC lamp drive voltage and supplying the AC lamp drive voltage to a high path of a backlight lamp, a low path... | 12/04/2007 |
| 7304869 | Inverter power source control for high frequency heater At least one of a start abnormality detector (31), a temperature abnormality detector (32) and a voltage abnormality detector (33) has a latch inhibiting circuit for inhibiting retention of a detecting state when one of the abnormality detectors... | 12/04/2007 |
| 7301788 | Power transform device and electronic device for reaching low acoustic noise A low acoustic noise solution for snubber circuits is utilized for relieving spike noise under a low-load mode of a snubber circuit, and for avoiding electromagnetic interference under a high-load mode of said snubber circuit. A power transform device utilizing the ... | 11/27/2007 |
| 7288929 | Inductive clamp for applying signal to buried utilities An inductive clamp includes a pair of jaws configured to surround a conductor, and a pair of handles, each connected to a corresponding jaw. A pivotal connection is provided that allows the jaws to close around a conductor. The jaws are optionally biased to hold the... | 10/30/2007 |
| 7274575 | AC coupled bias circuit for power converters A switching power system for converting an input voltage to an output voltage across a transformer is disclosed. The system includes a control circuit. The control circuit has a control input coupled for receiving the output voltage and an output coupled to a primar... | 09/25/2007 |
| 7275002 | Islanding detection and protection method An islanding detection and protection method of a parallel-type power converter is proposed, which performs perturbation to a power system to detect the frequency of the system voltage and the variation of the magnitude of the negative-sequence voltage as the basis ... | 09/25/2007 |
| 7265999 | Power supply regulator circuit and semiconductor device A power supply regulation circuit is provided which can achieve a preferable constant current drooping characteristic without the need for a constant current control circuit on the secondary side. During a constant current operation, a switching element (1) i... | 09/04/2007 |
| 7259597 | Low-voltage detection circuit A low-voltage detection circuit detects a terminal voltage of a power supply terminal. The low-voltage detection circuit includes a first voltage-dividing circuit, a second voltage-dividing circuit, and a comparator. The second voltage-dividing circuit includes a bi... | 08/21/2007 |
