子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | SYSTEM AND METHOD FOR VOLTAGE-CONTROLLED OSCILLATOR CALIBRATION | US15234743 | 2016-08-11 | US20170093409A1 | 2017-03-30 | Hormoz DJAHANSHAHI; Masoud GHOREISHI MADISEH |
| A system and method for calibrating a Voltage-Controlled Oscillator (VCO) having both fine-tuning control and coarse-tuning control. The VCO frequency can vary monotonically with changes in each of one or more operational conditions. The calibration method determines the coarse-tuning control setting for the VCO at system start-up. The method comprises generating frequency characterization data, generating a polynomial function from the characterization data, calculating the fine-tuning control voltage based on the polynomial function and a measurement of the operational conditions, and sweeping through all the coarse-tuning control settings to determine the coarse-tuning control setting that generates the closest VCO frequency to a target frequency when using the calculated fine-tuning control voltage. | ||||||
| 82 | Method And System For a Distributed Transmission Line Multiplexer For A Multi-Core Multi-Mode Voltage-Controlled Oscillator (VCO) | US15236372 | 2016-08-12 | US20170047891A1 | 2017-02-16 | Wenjian Chen; Sangeetha Gopalakrishnan; Raghava Manas Bachu; Vamsi Paidi |
| Methods and systems for a distributed transmission line multiplexer for a multi-core multi-mode voltage-controlled oscillator (VCO) may comprise a plurality of voltage controlled oscillators (VCOs) arranged adjacent to each other, where each of the plurality of VCOs are operable to generate an output signal at a configurable frequency, an impedance matching circuit comprising a respective driver and impedance matching elements coupled to each of the plurality of VCOs, and an output device coupled to the impedance matching circuit. The impedance matching elements may include capacitors and inductors. Between each adjacent pair of the respective drivers coupled to each of the plurality of VCOs, the impedance matching elements may include two inductors coupled in series between the drivers and a capacitor coupled to ground and to a common node between the two inductors. Impedance values of the capacitors and inductors may be configurable. The impedance matching elements may include a resistor coupled to a bias voltage VDD and to a common node with a capacitor that is coupled to ground, where the common node is coupled to one of the inductors. The output device may include a prescaler that is an integer or fractional frequency-N divider, or a buffer. The respective drivers coupled to each of the plurality of VCOs may be configured to provide a constant output power no matter which of said plurality of VCOs is enabled. | ||||||
| 83 | Frequency tuning device | US14941157 | 2015-11-13 | US09531396B1 | 2016-12-27 | Chao-Chieh Li |
| A device is disclosed that includes an oscillator, a frequency detector, and a selection circuit. The oscillator is configured to generate an oscillating signal. The oscillator includes a first tuning bank and a second tuning bank. The first tuning bank is configured to adjust the frequency of the oscillating signal within a first frequency band. The second tuning bank is configured to adjust the frequency of the oscillating signal within a second frequency band. The frequency detector is configured to generate a control signal according to at least one signal indicating the frequency of the oscillating signal. The selection circuit is configured to activate at least one of the first tuning bank and the second tuning bank according to the control signal. | ||||||
| 84 | Circuit arrangement and method for calibrating activation signals for voltage-controlled oscillators | US14552173 | 2014-11-24 | US09484929B2 | 2016-11-01 | Heinz Werker |
| In order to develop a circuit arrangement and also a method for calibrating at least one activation signal provided for a voltage-controlled oscillator such that the expenditure of energy is as low as possible and the output frequency is as high as possible, it is proposed—that the respective number of clock cycles for at least one calibration oscillator and at least one reference oscillator associated with the calibration oscillator is counted by means of at least one clock cycle counter connected downstream of the calibration oscillator and the reference oscillator and a clock error resulting from the difference between these two numbers of clock cycles is integrated and—that the clock error is converted by means of at least one digital-to-analog converter connected downstream of the clock counter into analog tuning signals from which the calibrated activation signal is derived. | ||||||
| 85 | System and method for a voltage controlled oscillator | US14592415 | 2015-01-08 | US09461583B2 | 2016-10-04 | Saverio Trotta |
| In accordance with an embodiment, a voltage controlled oscillator (VCO) includes a VCO core having a plurality of transistors and a varactor circuit that has a first end coupled to emitter terminals of the VCO core and a second end coupled to a tuning terminal. The varactor circuit includes a capacitance that increases with increasing voltage applied to the tuning terminal with respect to the emitter terminals of the VCO core. | ||||||
| 86 | Multiple frequency LC voltage controlled oscillator scheme | US14622626 | 2015-02-13 | US09455666B2 | 2016-09-27 | Chih-Chang Lin; Chan-Hong Chern; Ming-Chieh Huang; Tien-Chun Yang |
| A circuit includes at least two LC voltage controlled oscillators (LCVCOs). Each LCVCO includes a switch to selectively turn on or off the LCVCO. One selected LCVCO of the at least two LCVCOs is configured to provide a differential LCVCO output. A converter coupled to the at least two LCVCOs is configured to receive the differential LCVCO output and provide an output signal with a full voltage swing. | ||||||
| 87 | Ultra-low voltage-controlled oscillator with trifilar coupling | US14612415 | 2015-02-03 | US09438163B2 | 2016-09-06 | Ying-Ta Lu; Hsien-Yuan Liao; Ho-Hsiang Chen; Chewn-Pu Jou |
| The present disclosure relates to a device and method to reduce voltage headroom within a voltage-controlled oscillator by utilizing trifilar coupling or transformer feedback with a capacitive coupling technique. In some embodiments of trifilar coupling, a VCO comprises cross-coupled single-ended oscillators, wherein the voltage of first gate within a first single-ended oscillator is separated from the voltage of a second drain within a second single-ended oscillator within the cross-coupled pair. A trifilar coupling network is composed of a drain inductive component, a source inductive component, and a gate inductive component for a single-ended oscillator, wherein a coupling between drain inductive components and gate inductive components between single-ended oscillators along with a negative feedback loop within each single-ended oscillator forms a cross-coupled pair of transistors which reduces the drain-to-source voltage headroom to approximately a saturation voltage of a transistor within the cross-coupled pair. Other devices and methods are also disclosed. | ||||||
| 88 | Semiconductor device | US14594256 | 2015-01-12 | US09432016B2 | 2016-08-30 | Atsushi Umezaki |
| Provided is a semiconductor device exemplified by an inverter circuit and a shift register circuit, which is characterized by a reduced number of transistors. The semiconductor device includes a first transistor, a second transistor, and a capacitor. One of a source and a drain of the first transistor is electrically connected to a first wiring, and the other thereof is electrically connected to a second wiring. One of a source and a drain of the second transistor is electrically connected to the first wiring, a gate of the second transistor is electrically connected to a gate of the first transistor, and the other of the source and the drain of the second transistor is electrically connected to one electrode of the capacitor, while the other electrode of the capacitor is electrically connected to a third wiring. The first and second transistors have the same conductivity type. | ||||||
| 89 | Variable capacitor structure | US14146246 | 2014-01-02 | US09425736B2 | 2016-08-23 | Ram Kelkar |
| Variable capacitor structures and methods of use are disclosed. The variable capacitor structures include a variable controlled oscillator which includes a variable capacitor structure having at least one capacitor set driven by a control gate voltage of a voltage control circuit which comprises a logic cell that senses a selected frequency band and sets the control gate voltage based on the selected frequency band. | ||||||
| 90 | MULTIPLE FREQUENCY LC VOLTAGE CONTROLLED OSCILLATOR SCHEME | US14622626 | 2015-02-13 | US20160241187A1 | 2016-08-18 | Chih-Chang Lin; Chan-Hong Chern; Ming-Chieh Huang; Tien-Chun Yang |
| A circuit includes at least two LC voltage controlled oscillators (LCVCOs). Each LCVCO includes a switch to selectively turn on or off the LCVCO. One selected LCVCO of the at least two LCVCOs is configured to provide a differential LCVCO output. A converter coupled to the at least two LCVCOs is configured to receive the differential LCVCO output and provide an output signal with a full voltage swing. | ||||||
| 91 | Frequency synthesizers with amplitude control | US14836823 | 2015-08-26 | US09401724B1 | 2016-07-26 | Yuan Gao; Frank Leong; Robert Bogdan Staszewski |
| A frequency synthesizer device provides amplitude control. Using switch circuit operating in a first mode, a charge voltage is applied to an oscillator circuit that an inductive-capacitive (LC) tank circuit. The LC tank circuit has a capacitive element, and an inductive element that is connected to the capacitive element. Using the switch circuit operating in a second mode, the LC tank circuit is enabled to oscillate. Using driver circuits that are response to a voltage applied to the tank circuit, current is reinforced in the LC tank, and the reinforcement is based upon a transconductance gain of the driver circuits. Using a calibration circuit, an amplitude of an output signal from the oscillator circuit is detected. In response to the detected amplitude, the transconductance gain is adjusted by enabling or disabling auxiliary circuits from plurality of auxiliary circuits. | ||||||
| 92 | Split transformer based LC-tank digitally controlled oscillator | US14831091 | 2015-08-20 | US09374036B2 | 2016-06-21 | Augusto Ronchini Ximenes; Robert Bogdan Staszewski |
| A novel and useful LC-tank digitally controlled oscillator (DCO) incorporating a split transformer configuration. The LC-tank oscillator exhibits a significant reduction in area such that it is comparable in size to conventional ring oscillators (ROs) while still retaining its salient features of excellent phase noise and low sensitivity to supply variations. The oscillator incorporates an ultra-compact split transformer topology that is less susceptible to common-mode electromagnetic interference than regular high-Q LC tanks which is highly desirable in SoC environments. The oscillator, together with a novel dc-coupled buffer, can be incorporated within a wide range of circuit applications, including clock generators and an all-digital phase-locked loop (ADPLL) intended for wireline applications. | ||||||
| 93 | ADJUSTING THE MAGNITUDE OF A CAPACITANCE OF A DIGITALLY CONTROLLED CIRCUIT | US15013649 | 2016-02-02 | US20160156311A1 | 2016-06-02 | HERSCHEL A. AINSPAN; Mark A. Ferriss; Daniel J. Friedman; Alexander V. Rylyakov; Bodhisatwa Sadhu; Alberto Valdes-Garcia |
| An apparatus comprises a digitally controlled circuit having a variable capacitance and a controller configured to adjust a magnitude of the variable capacitance of the digitally controlled circuit. The digitally controlled circuit comprises a plurality of gain elements, the plurality of gain elements comprising one or more positive voltage-to-frequency gain elements and one or more negative voltage-to-frequency gain elements. The controller is configured to adjust the magnitude of the capacitance by adjusting the gain provided by respective ones of the gain elements in an alternating sequence of the positive voltage-to-frequency gain elements and the negative voltage-to-frequency gain elements. | ||||||
| 94 | Oscillator and semiconductor integrated circuit device | US14218580 | 2014-03-18 | US09344034B2 | 2016-05-17 | Yoichi Iizuka; Yasuo Ikeda; Satoshi Onishi |
| An oscillator and a semiconductor integrated circuit device with an internal oscillator capable of compensating the temperature characteristics even when there is a large parasitic capacitance too large to ignore directly between the output terminals of the oscillator. In an oscillator containing an inductance element L, and a capacitive element C, and an amplifier each coupled in parallel across a first and second terminal, the amplifier amplifies the resonance generated by the inductance element and capacitive element and issues an output from the first terminal and the second terminal, and in which a first resistance element with a larger resistance value than the parasitic resistance of the inductance element between the first terminal and the second terminal, is coupled in serial with the capacitive element between the first terminal and the second terminal. | ||||||
| 95 | Variable capacitance circuit, oscillator circuit, vibratory device, electronic apparatus, moving object, and method of manufacturing vibratory device | US14298350 | 2014-06-06 | US09344033B2 | 2016-05-17 | Hisahiro Ito |
| A variable capacitance circuit includes a plurality of variable capacitance elements (varicaps) each having the capacitance value controlled in accordance with the inter-terminal voltage applied between the terminals of the variable capacitance element and connected in parallel to each other, has the combined capacitance value of the plurality of variable capacitance elements variable taking a predetermined capacitance value as a base, sets the inter-terminal voltage of at least one of the plurality of variable capacitance elements to a first voltage as a variable voltage, and sets the inter-terminal voltage of the rest of the plurality of variable capacitance elements to a second voltage as a stationary voltage. | ||||||
| 96 | Adjusting the magnitude of a capacitance of a digitally controlled circuit | US14617507 | 2015-02-09 | US09325332B2 | 2016-04-26 | Herschel A. Ainspan; Mark A. Ferriss; Daniel J. Friedman; Alexander V. Rylyakov; Bodhisatwa Sadhu; Alberto Valdes-Garcia |
| An apparatus comprises a digitally controlled circuit having a variable capacitance and a controller configured to adjust a magnitude of the variable capacitance of the digitally controlled circuit. The digitally controlled circuit comprises a plurality of gain elements, the plurality of gain elements comprising one or more positive voltage-to-frequency gain elements and one or more negative voltage-to-frequency gain elements. The controller is configured to adjust the magnitude of the capacitance by adjusting the gain provided by respective ones of the gain elements in an alternating sequence of the positive voltage-to-frequency gain elements and the negative voltage-to-frequency gain elements. | ||||||
| 97 | Resonator | US14034398 | 2013-09-23 | US09318997B2 | 2016-04-19 | Casper van der Avoort; Andreas Bernardus Maria Jansman; Robert James Pascoe Lander |
| A resonator has a main resonator body and a secondary resonator structure. The resonator body has a desired mode of vibration of the resonator alone, and a parasitic mode of vibration, wherein the parasitic mode comprises vibration of the resonator body and the secondary resonator structure as a composite body. In this way, unwanted vibrational modes are quenched by the second suspended body. | ||||||
| 98 | Inductive-capacitive (LC) voltage controlled oscillator (VCO) having tuning range controlled by a digital-to-analog converter (DAC) with programmable tail current | US14224190 | 2014-03-25 | US09287825B2 | 2016-03-15 | Ali Atesoglu |
| A device includes an inductive-capacitive voltage controlled oscillator (LC-VCO) having a tank circuit and programmable tail current, and a control circuit configured to adjust the tail current based on an amount of capacitance provided to the tank circuit. | ||||||
| 99 | ADJUSTING THE MAGNITUDE OF A CAPACITANCE OF A DIGITALLY CONTROLLED CIRCUIT | US14791804 | 2015-07-06 | US20160065186A1 | 2016-03-03 | Herschel A. Ainspan; Mark A. Ferriss; Daniel J. Friedman; Alexander V. Rylyakov; Bodhisatwa Sadhu; Alberto Valdes-Garcia |
| An apparatus comprises a digitally controlled circuit having a variable capacitance and a controller configured to adjust a magnitude of the variable capacitance of the digitally controlled circuit. The digitally controlled circuit comprises a plurality of gain elements, the plurality of gain elements comprising one or more positive voltage-to-frequency gain elements and one or more negative voltage-to-frequency gain elements. The controller is configured to adjust the magnitude of the capacitance by adjusting the gain provided by respective ones of the gain elements in an alternating sequence of the positive voltage-to-frequency gain elements and the negative voltage-to-frequency gain elements. | ||||||
| 100 | Split Transformer Based LC-Tank Oscillator | US14831091 | 2015-08-20 | US20160056762A1 | 2016-02-25 | Augusto Ronchini Ximenes; Robert Bogdan Staszewski |
| A novel and useful LC-tank digitally controlled oscillator (DCO) incorporating a split transformer configuration. The LC-tank oscillator exhibits a significant reduction in area such that it is comparable in size to conventional ring oscillators (ROs) while still retaining its salient features of excellent phase noise and low sensitivity to supply variations. The oscillator incorporates an ultra-compact split transformer topology that is less susceptible to common-mode electromagnetic interference than regular high-Q LC tanks which is highly desirable in SoC environments. The oscillator, together with a novel dc-coupled buffer, can be incorporated within a wide range of circuit applications, including clock generators and an all-digital phase-locked loop (ADPLL) intended for wireline applications. | ||||||
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