With Rectifier Circuit Patents (Class 327/343)
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Patent number: 9278892Abstract: A method for converting an alcohol to a hydrocarbon fraction having a lowered benzene content, the method comprising: converting said alcohol to a hydrocarbon fraction by contacting said alcohol, under conditions suitable for converting said alcohol to said hydrocarbon fraction, with a metal-loaded zeolite catalyst catalytically active for converting said alcohol to said hydrocarbon fraction, and contacting said hydrocarbon fraction with a benzene alkylation catalyst, under conditions suitable for alkylating benzene, to form alkylated benzene product in said hydrocarbon fraction. Also described is a catalyst composition useful in the method, comprising a mixture of (i) a metal-loaded zeolite catalyst catalytically active for converting said alcohol to said hydrocarbon, and (ii) a benzene alkylation catalyst, in which (i) and (ii) may be in a mixed or separated state. A reactor for housing the catalyst and conducting the reaction is also described.Type: GrantFiled: April 28, 2014Date of Patent: March 8, 2016Assignee: UT-BATTELLE, LLCInventors: Chaitanya K. Narula, Brian H. Davison, Martin Keller
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Patent number: 8922148Abstract: A motor includes a rotor, a sensor unit, an offset unit, a rectification unit and a modulating unit. The sensor unit outputs a first signal in accordance with a magnetic field variation of the rotor. The offset unit is coupled to the sensor unit, and outputs a second signal in accordance with the first signal. The rectification unit is coupled to the offset unit, and outputs a third signal in accordance with the second signal. The modulating unit is coupled to the rectification unit, and outputs a control signal in accordance with a result by comparing the third signal with a periodic signal. The modulating unit controls a reverse rotation of the rotor smoothly in accordance with the control signal. A control method of the motor is also disclosed.Type: GrantFiled: December 7, 2012Date of Patent: December 30, 2014Assignee: Delta Electronics, Inc.Inventors: Yu-Liang Lin, Kun-Fu Chuang, Cheng-Chieh Liu
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Patent number: 8604836Abstract: A detector circuit, has a first diode, to an anode of which an AC signal is input and to which a constant voltage is supplied, a second diode, to an anode of which the constant voltage is supplied, and a difference current generation circuit, which generates the difference current between a first current flowing in the first diode and a second current flowing in the second diode.Type: GrantFiled: February 27, 2012Date of Patent: December 10, 2013Assignee: Fujitsu Semiconductor LimitedInventor: Hiroyuki Nakamoto
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Patent number: 8604837Abstract: A detector circuit, has a first diode, to an anode of which an AC signal is input and to which a constant voltage is supplied, a second diode, to an anode of which the constant voltage is supplied, and a difference current generation circuit, which generates the difference current between a first current flowing in the first diode and a second current flowing in the second diode.Type: GrantFiled: June 17, 2013Date of Patent: December 10, 2013Assignee: Fujitsu Semiconductor LimitedInventor: Hiroyuki Nakamoto
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Patent number: 8428515Abstract: Apparatus and method for generating a rectified output signal in a RFID tag from first and second alternating signals. A dual-terminal rectifier device has first and second input terminals to which the first and second alternating signals are applied, and further has a gate configured to form a conductive channel to electrically couple the first and second input terminals to the output terminal in response to a gate voltage. The dual-terminal rectifier device is configured to rectify a combination of the alternating input signals applied to the input terminals of the semiconductor device to generate a rectified output signal at an output terminal.Type: GrantFiled: February 7, 2011Date of Patent: April 23, 2013Assignee: Impinj, Inc.Inventor: Ronald A. Oliver
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Patent number: 8067973Abstract: The present invention discloses a smart driver used in flyback converters adopting a transconductance amplifier to turn on a synchronous rectifier FET, and a comparator to quickly turn off the synchronous rectifier FET.Type: GrantFiled: February 1, 2010Date of Patent: November 29, 2011Assignee: Monolithic Power Systems, Inc.Inventor: Anthonius Bakker
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Publication number: 20110193612Abstract: Consistent with an example embodiment, there is a method of controlling a synchronous rectifier having an input signal having oscillations therein and a switch which is switchable between an open state and a closed state. The method comprises filtering the input signal to produce a filtered signal, comparing the filtered signal with a reference value, and opening the switch in response to the comparison, in which the filtering is active filtering. The active filtering may be based on determination of the peaks (positive and/or negative) of the signal, either directly, including a quarter period offset, or including decay—or a combination of the above; alternatively, the active filtering may be based on the a smoothing functions such as a switched low-pass filter or a short time integrator.Type: ApplicationFiled: December 3, 2010Publication date: August 11, 2011Applicant: NXP B.V.Inventors: Johann Baptist Daniel KUEBRICH, Markus SCHMID, Thomas Antonius DUERBAUM, Frans PANSIER, Gian HOOGZAAD, Hans HALBERSTADT
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Patent number: 7907899Abstract: Apparatus and method for generating a rectified output signal in a RFID tag from first and second alternating signals. A dual-terminal rectifier device has first and second input terminals to which the first and second alternating signals are applied, and further has a gate configured to form a conductive channel to electrically couple the first and second input terminals to the output terminal in response to a gate voltage. The dual-terminal rectifier device is configured to rectify a combination of the alternating input signals applied to the input terminals of the semiconductor device to generate a rectified output signal at an output terminal.Type: GrantFiled: July 10, 2006Date of Patent: March 15, 2011Assignee: Impinj, Inc.Inventor: Ronald A. Oliver
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Patent number: 7750725Abstract: A stabilizing current source circuit is provided. The stabilizing current source circuit is used for stabilizing a current provided by a current source, and the current of the current source increases when temperature rises. The stabilizing current source circuit comprises a current source circuit and an adjustment circuit. The current source circuit provides a current that increases when temperature rises. The adjustment circuit is coupled to the current source circuit and provides an input current that increases when temperature rises. The current of the current source is subtracted from the input current to generate a current source current which does not vary with temperature.Type: GrantFiled: November 21, 2007Date of Patent: July 6, 2010Assignee: Princeton Technology CorporationInventor: Shiun-Dian Jan
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Patent number: 7714639Abstract: A stabilizing method for a current source is provided. The current source is provided a current which increases when temperature rises. An adjustment circuit provides an input current increasing when temperature rises. A rising ratio of the input current with temperature is the same as a rising ratio of the current of the current source with temperature. The current of the current source is subtracted from the input current. After the current of the current source is subtracted from the input current, the current of the current source does not vary when temperature varies.Type: GrantFiled: November 21, 2007Date of Patent: May 11, 2010Assignee: Princeton Technology CorporationInventor: Shiun-Dian Jan
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Patent number: 7417485Abstract: Embodiments of the invention are generally directed to a high-speed differential energy difference integrator (EDI) for adaptive equalizers. In an embodiment, the EDI includes two differential full-wave rectifiers providing differential outputs that are cross-coupled to the inputs of an integration capacitor. In one embodiment, the active areas of the transistors of the differential full-wave rectifiers are substantially the same.Type: GrantFiled: September 1, 2004Date of Patent: August 26, 2008Assignee: Cypress Semiconductor CorporationInventor: Dusan Vecera
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Patent number: 6879534Abstract: The invention includes an apparatus and a method for minimizing power supply sensitivity of a differential amplifier. The apparatus includes a current source providing a differential amplifier bias current to a common source node of the differential amplifier. A voltage sensor senses variations of a power supply associated with the current source. Variations sensed by the voltage sensor control a magnitude of the differential amplifier bias current. The method includes a current source providing the source current. A voltage potential of the common source node is sensed. The current source is adjusted depending upon the sensed voltage potential of the common source node, thereby adjusting a magnitude of the source current.Type: GrantFiled: November 1, 2002Date of Patent: April 12, 2005Assignee: Hewlett-Packard Development Company, L.P.Inventors: Frederick Perner, Kenneth Smith
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Patent number: 6870417Abstract: A loss-less diode equivalent circuit which functions to reduce and eliminate the forward bias voltage or drop associated with conventional diodes. The loss-less diode comprises a reverse connected MOSFET device which is configured with a clamping circuit and coupled to an input stage. The drain is coupled to the input stage which receives an input signal. The source of the MOSFET device provides an output port for charging a capacitor in a conduction or on state.Type: GrantFiled: April 9, 2003Date of Patent: March 22, 2005Assignee: Siemens Milltronics Process Instruments, Inc.Inventor: Claude Mercier
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Publication number: 20040257144Abstract: According to the present invention, there is provided a variable resistance circuit comprising,Type: ApplicationFiled: April 1, 2004Publication date: December 23, 2004Applicant: Kabushiki Kaisha ToshibaInventor: Mitsuru Nagata
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Patent number: 6765425Abstract: A rectifying circuit and method to produce a DC output by rectifying a sinusoidal source having a plurality of output phase voltages and a plurality of phase-to-phase voltages, the rectifying circuit including a bridge circuit coupled to the output phase voltages, the bridge circuit having a plurality of switches; and a control circuit coupled to the output phase voltages and to the bridge circuit, the control circuit being configured to control the switches in accordance with respective absolute values of the phase-to-phase voltages; wherein the output phase voltages are rectified to produce the DC output. When the sinusoidal source is inductive, switch turn-off may be timed to provide synchronous rectification related to estimates of source periodicity.Type: GrantFiled: February 26, 2003Date of Patent: July 20, 2004Assignee: International Rectifier CorporationInventor: Bertrand Vaysse
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Patent number: 6437621Abstract: A waveform shaping circuit is provided so that the duty factor of clock pulses can be set to 50% with high accuracy even if the clock pulses are of a low voltage and a high frequency. An inverter which receives the clock pulses through an alternating current coupling capacitor is provided with a non-linear limiter element for limiting an amplitude of an output symmetrically on positive and negative sides thereof. A first current-limiting impedance and a second current-limiting impedance are connected between a power supply side terminal of the inverter and a power supply bus and between a grounding side terminal of the inverter and a grounding bus, respectively.Type: GrantFiled: March 26, 2001Date of Patent: August 20, 2002Assignee: Hitachi, Ltd.Inventors: Kazuo Kato, Takashi Sase, Takashi Hotta, Fumio Murabayashi
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Publication number: 20020070787Abstract: A rectifying integrator of an input signal with full output dynamics, relative to a voltage reference intermediate with respect to the dynamics of the input signal, includes a first line of integration having at least one integrator for integrating that portion of the input signal that exceeds the voltage reference, and includes a hold capacitor coupled in cascade to the integrator. The rectifying integrator includes a second line of integration, identical to the first line of integration, for integrating that portion of the input signal that remains below the voltage reference. An adder output stage generates an output signal equal to the difference between the voltages existing on the hold capacitors of the first and second lines of integration.Type: ApplicationFiled: July 20, 2001Publication date: June 13, 2002Applicant: STMicroelectronics S.r.l.Inventors: Elena Pernigotti, Alberto Poma, Carol Protti
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Patent number: 6366152Abstract: A vector-signal processing circuit can be operated with low power consumption and can be configured so as to be cheap. Sensor signals in three-axial directions are individually rectified by full-wave-rectifier circuits individually formed by combining four diodes. Subsequently, the outputs of the above are added by an adder circuit and are further processed by a comparator, thereby generating digital signals. Forward-voltage-falling characteristics of the individual diodes used in the full-wave rectifier circuits are set to 0.3 V, and a threshold of the comparator is set to 0.6 V.Type: GrantFiled: September 19, 2000Date of Patent: April 2, 2002Assignee: NGK Insulators, Ltd.Inventors: Yukihisa Takeuchi, Kazuyoshi Shibata, Iwao Ohwada, Masahiko Namerikawa
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Patent number: 6271712Abstract: A synchronous rectifier circuit (10) includes a polarity comparator (14) that generates a signal to a driver circuit (16) for controlling the voltage at the gate of a power MOSFET (60). The power MOSFET (60) is switched to operate in the conduction mode and short out a parasitic diode (62) when the diode is forward biased. The power MOSFET (60) is switched to operate in the nonconduction mode when the parasitic diode (62) is reverse biased. A bias supply circuit (12) uses a capacitor (70) to generate a regulated internal bias that provides power to the polarity comparator (14) and to the driver circuit (16). The internal bias allows the power MOSFET (60) to provide a current conduction that is substantially isolated from the changes in voltage levels at the terminals (64, 66) of the synchronous rectifier circuit (10).Type: GrantFiled: April 7, 1999Date of Patent: August 7, 2001Assignee: Semiconductor Components Industries LLCInventor: Alan Richard Ball
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Patent number: 6111451Abstract: A highly efficient compact multiple output voltage generation circuit is designed for use in integrated circuit devices such as DRAMs which require multiple internal voltage supplies for optimum performance. An oscillator is connected to a primary coil of a microtransformer. The microtransformer secondary coil has multiple taps one of which is connected to ground. A second transformer tap is connected to a transformer output node. The oscillating transformer output signal is capacitively coupled to a voltage rectifier. The input to the rectifier is biased to one diode drop below Vcc. The output of the rectifier is an internal supply voltage greater than ground. Another transformer tap is connected to a negative oscillation output node. The negative oscillating signal is rectified to produce a negative internal supply voltage. The voltage generation circuit operates effectively at low Vcc input levels where capacitor based voltage pumps often fail. The circuit is compatible with CMOS manufacturing processes.Type: GrantFiled: February 19, 1999Date of Patent: August 29, 2000Assignee: Micron Technology, Inc.Inventors: Mohamed A. Imam, Patrick J. Mullarkey
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Patent number: 5907258Abstract: The present invention discloses a fully integrated precision HDA shock sense circuit with high-order filters implemented in integrated circuit technology. Filters are integrated with an improved on-chip bias generator so that they can provide stable, trimmable and/or programmable frequency responses with a minimum number of external capacitors. The invention provides dual full-wave rectifiers for X-axis and Y-axis shock sensing so that more accurate and reliable shock detection can be achieved. Input signals from X-axis and Y-axis shock sensors are converted to current and provided to the dual full-wave rectifiers. The currents thus full-wave rectified are summed and lowpass filtered to generate an output signal, which is then fed to a comparator to produce a shock detection logic signal.Type: GrantFiled: April 17, 1996Date of Patent: May 25, 1999Assignee: Texas Instruments IncorporatedInventor: Ching-Siang Chen
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Patent number: 5900764Abstract: A highly efficient compact multiple output voltage generation circuit is designed for use in integrated circuit devices such as DRAMs which require multiple internal voltage supplies for optimum performance. An oscillator is connected to a primary coil of a microtransformer. The microtransformer secondary coil has multiple taps one of which is connected to ground. A second transformer tap is connected to a transformer output node. The oscillating transformer output signal is capacitively coupled to a voltage rectifier. The input to the rectifier is biased to one diode drop below Vcc. The output of the rectifier is an internal supply voltage greater than ground. Another transformer tap is connected to a negative oscillation output node. The negative oscillating signal is rectified to produce a negative internal supply voltage. The voltage generation circuit operates effectively at low Vcc input levels where capacitor based voltage pumps often fail. The circuit is compatible with CMOS manufacturing processes.Type: GrantFiled: May 19, 1997Date of Patent: May 4, 1999Assignee: Micron Technology, Inc.Inventors: Mohamed A. Imam, Patrick J. Mullarkey
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Patent number: 5561383Abstract: A circuit that can switch between a peak detect and an averaging mode is described. In a preferred embodiment, when the circuit is in a peak detect mode a first transistor is on and a second is off, enabling an amplifier in the circuit to produce a signal representative of the peak value of an input signal. In an averaging mode, the first transistor is off, and a second transistor turns on, disabling the output of the amplifier, and thus enabling the averaging mode components of the invention.Type: GrantFiled: November 4, 1994Date of Patent: October 1, 1996Assignee: International Business Machines CorporationInventor: Dennis L. Rogers