Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8179700 | Control circuit with adaptive minimum on time for power converters A control circuit includes a switch coupled to a transformer of a power converter for switching the transformer. A sampling circuit is coupled to the transformer to sample a reflected voltage of the transformer to generate a voltage signal. A switching circuit gener... | 05/15/2012 |
| 8169800 | Power converter, switching control device thereof, and driving method thereof A power converter according to the present invention includes a power supply unit, an output unit, and a switching controller. The power supply unit includes a primary coil of a transformer that receives an input voltage, a gate electrode, and a switch having a firs... | 05/01/2012 |
| 8169801 | Voltage converters with integrated low power leaker device and associated methods Voltage converters with integrated low power leaker device and associated methods are disclosed herein. In one embodiment, a voltage converter includes a switch configured to convert a first electrical signal into a second electrical signal different than the first ... | 05/01/2012 |
| 8164928 | Method and apparatus of operating a primary-side-regulation power converter at both continuous current mode and discontinuous current mode A method and an apparatus of operating a primary-side-regulation power converter at both continuous current mode and discontinuous current mode are provided. The apparatus includes a switching circuit, a signal generator, a correlation circuit, and a feedback modula... | 04/24/2012 |
| 8139381 | Power converter, and switching controller and driving method thereof In a power converter, a primary coil of a transformer receives an input voltage, and a first terminal of a switch is coupled to the primary coil. An output unit includes a secondary coil of the transformer, and outputs an output voltage to which the input voltage is... | 03/20/2012 |
| 8130516 | Switching power supply control semiconductor integrated circuit sampling an auxiliary wiring voltage near a point at which a secondary rectifier diode current becomes zero Disclosed a switching power supply apparatus which includes a voltage converting transformer including an auxiliary winding on a primary side and a switching control circuit, wherein the switching control circuit includes a detection circuit to detect a falling edge... | 03/06/2012 |
| 8125802 | Systems and methods for reducing EMI in switch mode converter systems Switch mode power converter system and method thereof. The system includes one or more isolation boxes including at least a first isolation box, an input primary winding for receiving an input signal for the switch mode power converter system, and an output secondar... | 02/28/2012 |
| 8077488 | Switching-type power-supply unit and a method of switching in power-supply unit A switching-type power-supply which enables the switching with little power loss and a method of switching the switching-type power-supply are provided. The switching-type power-supply unit includes a transformer with primary, secondary, winding and control windings... | 12/13/2011 |
| 8027176 | Switching power supply circuit In a RCC type switching power supply circuit, a sensing coil connected magnetically closely with an output coil is equipped in a fly-back transformer. The sensing coil is connected with a timing condenser through a Zener diode and an alternate current voltage output... | 09/27/2011 |
| 7974109 | Digital compensation for cable drop in a primary side control power supply controller A system and a method that uses primary side sensing to regulate the output voltage at a cable end without any remote sensing of cable connections back from the load. This is accomplished by approximating the current from the control voltage in the control loop thro... | 07/05/2011 |
| 7889522 | Flyback switching power supply and control method thereof A flyback switching power supply capable of regulating an operation frequency based on a current regulation mechanism is disclosed. The flyback switching power supply includes a transformer, a switch, a switch control circuit, and a regulation circuit. The transform... | 02/15/2011 |
| 7864550 | Power adapter with voltage-stabilized compensation A power adapter with voltage-stabilized compensation includes a pulse frequency modulation circuit to generate a driving pulse which has a variable OFF time interval to control power transformed and output by a transformer. The power adapter also has an ancillary co... | 01/04/2011 |
| 7778050 | Energy transfer device and energy transfer control semiconductor device The present invention includes a turn-off signal modulating circuit that periodically varies a turn-off timing of a switching element 2 at a preset modulation time after a current detection by a drain current detecting circuit 15, and by modulating the... | 08/17/2010 |
| 7768802 | Switching mode power supply and method of operation In one embodiment, a switching mode power supply (SMPS) includes a rectifier for generating an input DC voltage from an input AC voltage. A switching transistor, coupled to a primary coil of a transformer, converts the input DC voltage and supplies power to a second... | 08/03/2010 |
| 7764521 | Apparatus and method for providing multiple functions and protections for a power converter A power converter has a transformer including a primary winding connected between a power input and a power switch, the power switch is switched to deliver power from the power input to a power output, an auxiliary winding provides an induced voltage in such a manne... | 07/27/2010 |
| 7755915 | Power supply circuit with at least one feedback circuit feeding operating state of transformer back to pulse width modulation circuit thereof An exemplary power supply circuit (20) includes a first commutating and filter circuit (21), a transformer (24), a second commutating and filter circuit (25), a transistor (27), a pulse width modulation circuit (26) outputti... | 07/13/2010 |
| 7746672 | Switching power supply apparatus A switching power supply apparatus which includes a DC power supply, an isolation transformer having primary, secondary and tertiary windings, and a switching element, and in which, by turning the switching element on and off, the high-frequency voltage appearing in... | 06/29/2010 |
| 7701735 | Converter and driving method thereof A converter and a driving method thereof are provided. The converter includes a main switch and a switching controller. The switching controller controls on/off of the main switch by using a first voltage corresponding to an output voltage and a first current flowin... | 04/20/2010 |
| 7701734 | Detection circuit to detect input voltage of transformer and detecting method for the same A circuit and a method for detecting a voltage of a transformer are provided. The circuit includes a current output circuit coupled to a winding of a transformer to generate a current signal. A current-to-voltage circuit is coupled to the current output circuit to g... | 04/20/2010 |
| 7697308 | Compensating for inductance variation in a power converter using a dual-purpose feedback pin A comparing circuit and a control loop are used to maintain the peak level of current flowing through an inductor of a flyback converter. An inductor switch control signal controls an inductor switch through which the inductor current flows. The inductor current inc... | 04/13/2010 |
| 7684216 | Quasi resonant switching mode power supply A switching mode power supply (SMPS) and a driving method thereof are provided. The SMPS includes a power supply block that includes a first switch coupled to a first coil of a primary side of a transformer for converting an input voltage, wherein the power supply b... | 03/23/2010 |
| 7630219 | DC to DC converter for decreasing switching loss according to the turn-on/turn-off state of a switch A direct current (DC) to DC converter is provided. The DC to DC converter includes: a transformer which comprises a primary winding which is connected in series with an input voltage and a secondary winding which generates induced current when the input voltage is a... | 12/08/2009 |
| 7583519 | Switch mode power supply systems This invention relates to methods and apparatus for sensing the output current in a switch mode power supply (SMPS) using primary side sensing. We describe a module which senses a current in a primary winding of a transformer and a voltage on a primary or auxiliary ... | 09/01/2009 |
| 7554822 | Power converter for led large area light source lamp Power converter for receiving an input current at an input voltage and for providing an output current at an output voltage. The power converter comprises a transformer (133) having a primary (136) and at least one secondary (138) side, wherein ... | 06/30/2009 |
| 7551460 | Switch mode power supply controllers This invention relates to switch mode power supply (SMPS) controllers employing primary side sensing. We describe an (SMPS) controller which uses an area correlator to compare an area under a feedback signal waveform between a start point defined by said first timin... | 06/23/2009 |
| 7545654 | Control circuit for current and voltage control in a switching power supply A control circuit and method for controlling the output voltage and/or the output current of a switching power supply. The control circuit includes a transformer with a primary-side and a secondary-side main winding and a primary-side switch for switching on and off... | 06/09/2009 |
| 7535736 | Switching power supply for reducing external parts for overcurrent protection A switching power supply has a switching device connected via a primary winding of a transformer to DC input voltage; a circuit for rectifying voltage at a secondary winding of the transformer, and outputting an output signal; and a control circuit for controlling o... | 05/19/2009 |
| 7525823 | Switch mode power supply systems Methods and apparatus for sensing the output current in a switch mode power supply (SMPS) using primary side sensing are described. A system includes a primary current sense input, a charge input to sense a charging time of an SMPS transformer; a discharge input to ... | 04/28/2009 |
| 7502236 | Power supply controller responsive to a feedforward signal An apparatus and method of switching a switch of a power supply in response to an input voltage signal are disclosed. According to aspects of the present invention, a power supply controller includes a switch duty cycle controller coupled to receive a feedback signa... | 03/10/2009 |
| 7492615 | Switching power supply A feedback circuit (3) generates an error amplification signal VEAO for stabilizing an output voltage Vo at the reference voltage. The reference voltage is set beforehand in the feedback circuit (3). The peak value of drain current ID passing through a... | 02/17/2009 |
| 7443700 | On-time control for constant current mode in a flyback power supply A primary side sensing power control system and method for constant current control that utilizes a relationship that involves the measured reset-time from the previous cycle to determine the primary side peak current and off-time for the next cycle. This control me... | 10/28/2008 |
| 7440296 | Switched mode power supply having a control circuit for setting the switching frequency of the primary side switch in a linear relationship to a measurement voltage produced from the auxiliary voltage This invention relates to a control circuit for the closed-loop control of an output voltage of a primary-controlled switched-mode power supply as well as an associated method. The switched-mode power supply comprises a primary-side switch and a transformer with at ... | 10/21/2008 |
| 7433210 | Switched-mode power supply comprising an adjustable oscillator The switched-mode power supply has a transformer which contains a primary winding and at least one secondary winding, a switching transistor in series with the primary winding, a driver stage for controlling the switching transistor, and a control circuit for contro... | 10/07/2008 |
| 7414865 | Controller having output current control for a power converter A controller controls the output current by measuring and controlling the switching current of the power converter. A first circuit generates a first signal in accordance with the switching current. A second circuit detects a discharge-time of the transformer. A thi... | 08/19/2008 |
| 7414864 | Switching power supply apparatus A switching power supply apparatus includes a first inductor that is serially connected to a primary winding of a transformer, and a second inductor that is arranged so as to apply a voltage of a capacitor with sine waves obtained by rectifying an AC input voltage f... | 08/19/2008 |
| 7394670 | Switching power source A control circuit 8 of a switching power source comprises a voltage detector 31 for detecting a voltage VDC of a DC power supply 1 to produce a detection voltage VDT; a comparator 41 for producing an output signal V | 07/01/2008 |
| 7394669 | Switching mode power supplies In a switching mode power supply, an input received from the secondary side of the transformer 7 and indicative of the power being drawn by the loads is used to control the timing of bursts. The input is compared with two threshold different threshold values ... | 07/01/2008 |
| 7388764 | Primary side constant output current controller A lower-cost and more precise control methodology of regulating the output current of a Flyback converter from the primary side is provided. The methodology regulates the output current accurately in both continuous current mode (CCM) and discontinuous mode (DCM) an... | 06/17/2008 |
| 7382062 | Wide voltage range stabilized switching power supply for valve actuators The invention finds application in the field of power supplies for valve actuators, and particularly relates to a wide voltage range stabilized switching power supply for valve actuators, of the type that comprises a filter 2, a diode bridge 3, an arra... | 06/03/2008 |
| 7372684 | Power supply device A power supply device has a pulse width control circuit for controlling voltage converting operation of a voltage converting circuit by changing a pulse width. A momentary interruption detecting circuit detects a change in an output voltage when the output voltage s... | 05/13/2008 |
