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Mountable Printable Placard With Headband
A resilient headband in a shape for being mounted on the head of the user. The headband is equipped with a longitudinal slotted member for holding a placard.
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| Number | Title | Issue Date |
| 8164927 | Switch control device and switch control method The present invention relates to a switch control device and a switch control method. The present invention controls a switching operation of a power switch that controls output power of a switching mode power supply (SMPS). The present invention generates an operat... | 04/24/2012 |
| 8159839 | Method and apparatus for implementing an unregulated dormant mode in a power converter A control circuit for use in a power converter with an unregulated dormant mode of operation is disclosed. In one aspect a power converter includes a drive signal generator that is coupled to generate a drive signal to control switching of a power switch coupled to ... | 04/17/2012 |
| 8125801 | Method and apparatus for increasing the power capability of a power supply Techniques are disclosed to extend an on time period of switch to regulate a transfer of energy from an input of a power supply to an output of a power supply. One example integrated circuit includes an energy transfer element coupled between an input and an output ... | 02/28/2012 |
| 8125800 | Secondary-side amplifier with soft start An isolated switching regulator has a closed-loop soft-start feature that allows tighter regulation of the output voltage and eliminates or reduces overshoot. It also has an optional reset feature which will resoft-start the regulator during recovery from a fault on... | 02/28/2012 |
| 8085560 | Power supply apparatus A power supply apparatus includes: a transformer which converts input power supplied to a primary winding to be induced to a secondary winding; a current detector which detects an output current of the secondary winding of the transformer; a voltage detector which d... | 12/27/2011 |
| 8077487 | Using output drop detection pulses to achieve fast transient response from a low-power mode In a first aspect, in a Primary Side Regulation (PSR) power supply, some primary current pulses are used to forward bias an output diode such that an auxiliary winding voltage can be properly sampled after each pulse. The samples are used to regulate the power suppl... | 12/13/2011 |
| 8054656 | Switching control circuit for a switching power converter A switching control circuit is coupled to a switching device and an auxiliary winding of a transformer, wherein a primary winding of the transformer is coupled to the switching device. The switching control circuit includes a voltage receiver, a comparing unit and a... | 11/08/2011 |
| 8040699 | Secondary side constant voltage and constant current controller A low-cost integrated circuit is used as a secondary side constant voltage and constant current controller. The integrated circuit has four terminals and two amplifier circuits. A first amplifier circuit is used to sense a voltage on a FB terminal and in response to... | 10/18/2011 |
| 7952895 | Method and apparatus for implementing an unregulated dormant mode in a power converter A control circuit for use in a power converter with an unregulated dormant mode of operation is disclosed. In one aspect a power converter includes a drive signal generator coupled to generate a drive signal to control switching of a power switch to be coupled to th... | 05/31/2011 |
| 7855899 | Controller with loop impedance modulation for power converter A control circuit is provided to generate a mode signal at light load of the power converter. The mode signal is coupled to disable the switching signal for saving power. The impedance of an input circuit is increased in response to the mode signal. Furthermore, a s... | 12/21/2010 |
| 7817448 | Power supply system for reducing reverse current The present invention discloses a power supply system for reducing reverse current, the system comprising a primary side circuit, for receiving alternating current; a transformer circuit, for transforming voltage; a secondary side rectifier circuit, for rectifying v... | 10/19/2010 |
| 7813150 | Compensation for parameter variations in a feedback circuit Techniques to compensate for parameter variations in a feedback circuit are disclosed. In one embodiment, a regulator circuit includes an energy source coupled to output a generated current in response to a control current. A feedback resistor is coupled to an outpu... | 10/12/2010 |
| 7596005 | Method and apparatus providing a multi-function terminal for a power supply controller A power supply controller circuit in one embodiment comprises a power switch, a multifunction circuit, and a control circuit. The power switch comprises a source and a drain respectively coupled to first and second terminals of the power supply controller circuit. T... | 09/29/2009 |
| 7593242 | Method and apparatus for increasing the power capability of a power supply Techniques are disclosed to extend an on time period of switch to regulate a transfer of energy from an input of a power supply to an output of a power supply. One example integrated circuit includes an energy transfer element coupled between an input and an output ... | 09/22/2009 |
| 7535735 | Compensation for parameter variations in a feedback circuit Techniques to compensate for parameter variations in a feedback circuit are disclosed. In one embodiment, a regulator circuit includes an energy source coupled to output a generated current in response to a control current. A feedback resistor is coupled to an outpu... | 05/19/2009 |
| RE40656 | Primary-side controlled flyback power converter The present invention provides a primary-side flyback power converter that supplies a constant voltage output and a constant current output. To generate a well-regulated output voltage under varying load conditions, a PWM controller is included in the power converte... | 03/10/2009 |
| 7468895 | Method and system for providing a bias voltage for a power input sub-circuit of a switched mode power supply A switched mode power supply (SMPS) is disclosed. The switched mode power supply (SMPS) includes a controller sub-circuit that generates an output signal that drives a switch. The controller sub-circuit generates a bias voltage without using a bias regulator for a s... | 12/23/2008 |
| 7453709 | Method and apparatus for increasing the power capability of a power supply Techniques are disclosed to extend an on time period of switch to regulate a transfer of energy from an input of a power supply to an output of a power supply. One example integrated circuit includes an energy transfer element coupled between an input and an output ... | 11/18/2008 |
| 7433208 | Switching power supply device and electronic apparatus A switching power supply device includes a primary winding of a transformer that is connected in series to a first switching element, and a secondary winding is provided with a rectifier circuit and an output voltage control circuit arranged to detect an output volt... | 10/07/2008 |
| 7426120 | Switching control circuit having a valley voltage detector to achieve soft switching for a resonant power converter The present invention provides a switching control circuit having a valley voltage detector to achieve the soft switching and improve the efficiency of a power converter. The switching control circuit includes a control circuit coupled to the feedback signal to gene... | 09/16/2008 |
| 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 |
| 7411406 | Power supply with current measurement circuit for transformer with high frequency output A current measurement circuit to measure the output of a power supply transformer includes a simulation capacitor having a capacitance proportional to a parasitic capacitance of the transformer. The first electrode of the capacitor is coupled to an output winding of... | 08/12/2008 |
| 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 |
| 7388763 | Switching power supply A switching power supply of the present invention comprises: a switching element through which a DC voltage is supplied via a primary winding; an output voltage detection circuit detecting a voltage of a secondary winding to generate an error signal; a regulator gen... | 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 |
| 7362592 | Switching control circuit for primary-side controlled power converters The present invention discloses a switching control circuit for a primary-side controlled power converter. A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal. A current-waveform detector generates a current-waveform signal by ... | 04/22/2008 |
| 7362593 | Switching control circuit having off-time modulation to improve efficiency of primary-side controlled power supply A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal by multi-sampling a voltage signal of a transformer. The discharge-time signal represents a discharge time of a secondary-side switching current. A voltage-loop error amplifie... | 04/22/2008 |
| 7359220 | Control circuit for controlling a switch based on a voltage of an auxiliary winding in a switching power supply The present invention refers to a control circuit and an associated method of controlling the output voltage of a primarily controlled power switching supply with a primary-sided switch and a transformer with an auxiliary winding, in which after opening the primary-... | 04/15/2008 |
| 7355867 | Power supply for an electric meter having a high-voltage regulator that limits the voltage applied to certain components below the normal operating input voltage Disclosed is an invention relating to a power supply for use in an apparatus for measuring electrical energy, comprising, in one embodiment, a first switching device, a device for storing electrical charge in electrical connection with the first switching device, a ... | 04/08/2008 |
| 7352595 | Primary-side controlled switching regulator A switching regulator includes a switching device to switch a transformer from a primary-side to secondary side. A control circuit generates a switching signal for regulating output of the switching regulator. The control circuit includes a first circuit to generate... | 04/01/2008 |
| 7348735 | Lamp driver An electronic device for starting and/or re-starting a power-driven device such as a lamp, bulb or lighting fixture includes an input stage, a rectifier stage, a power factor correction stage with total harmonic distortion correction, and a coil device comprising a ... | 03/25/2008 |
| 7345894 | Cascode switch power supply A switching power supply is disclosed for improving the no-load power drain of low-power mains operated supplies. The power converter utilizes a cascoded switch arrangement with a conventional high voltage power MOSFET and a low voltage, low gate charge MOSFET. Driv... | 03/18/2008 |
| 7339359 | Terminal for multiple functions in a power supply An integrated circuit (IC) device includes a first function circuitry operable to perform a first function and a second function circuitry operable to perform a second function. A multi-function terminal is provided. A voltage sensing circuit is coupled to the multi... | 03/04/2008 |
| 7339799 | Switching power supply A switching power supply includes a first series circuit formed by connecting first and second switching elements in series at both ends of a direct-current power source, a second series circuit formed by connecting a resonant capacitor, a resonant reactor, and a pr... | 03/04/2008 |
| 7339802 | DC-AC converter and controller IC therefor An inventive inverter has a semiconductor switch circuit connected to the primary winding of a transformer. The semiconductor switch circuit is respectively controlled by PWM to supply a constant current to the load connected to a secondary winding of the transforme... | 03/04/2008 |
| 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 |
| 7336057 | DC/DC converter A DC/DC converter includes: a boost converter that boosts an input voltage in accordance with a first control signal; an insulated converter that converts an output of the boost converter in accordance with a second control signal; a current sensor that detects an o... | 02/26/2008 |
| 7336507 | Power supply outputting multiple voltages A power supply includes a transformer, a second output line, a second output line, a controller, and a current bypass circuit. The transformer has a primary side and a secondary side. The first output line derived from a first point on the secondary side. The first ... | 02/26/2008 |
| 7330359 | Power supply unit The present invention is directed to a power supply unit that provides large power supply to the load. The voltage detector 51 generates a voltage detection signal by detecting the voltage generated at the output terminals 21, 22. The current detector ... | 02/12/2008 |
| 7323849 | Rechargeable portable light with multiple charging systems A rechargeable portable light having a housing member with an opening for the emission of light, and two possible charging systems including an AC charger, and an auto or boat charger. An electronic circuit is located within the housing member and includes at least ... | 01/29/2008 |
