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 |
|---|---|---|---|---|---|---|
| 201 | Monolithic signal generation for injection locking | US14179600 | 2014-02-13 | US09270289B2 | 2016-02-23 | William W. Walker; Nikola Nedovic |
| A system for signal generation may include a phase-locked-loop including a first oscillator. The system may also include a second oscillator. The first oscillator may be configured to generate a first signal based on a phase-locked-loop control signal generated by the phase-locked-loop. The second oscillator may be configured to generate a second signal based on the phase-locked-loop control signal such that a free-running frequency of the first signal is approximately equal to a free-running frequency of the second signal to obtain injection locking between the first oscillator and the second oscillator when energy from the first oscillator is coupled into the second oscillator. | ||||||
| 202 | CLOCK GENERATOR USING FREE-RUNNING OSCILLATOR AND METHOD THEREFOR | US14339113 | 2014-07-23 | US20160028405A1 | 2016-01-28 | Aaron J. Caffee; Brian G. Drost; Hendricus de Ruijter |
| A clock generator comprises a free-running oscillator and a tunable frequency synthesizer. The free-running oscillator has an output for providing an oscillator clock signal. The tunable frequency synthesizer is coupled to the free-running oscillator and provides a clock output signal in response to the oscillator clock signal and a frequency control signal. The frequency control signal corresponds to a measured characteristic of the free-running oscillator. | ||||||
| 203 | Frequency fine tuning | US14143158 | 2013-12-30 | US09240754B2 | 2016-01-19 | Michael John Story |
| An oscillator includes an oscillating circuit for generating an output signal having an output signal frequency. The oscillating circuit includes an inductive element and a capacitive element, the capacitive element having a variable capacitance for coarsely tuning the output signal frequency. The oscillator further includes a current supply for supplying current to the oscillating circuit, the current supply being variable for finely tuning the output signal frequency. | ||||||
| 204 | Voltage-controlled oscillator, signal generation apparatus, and electronic device | US14384248 | 2013-03-11 | US09236872B2 | 2016-01-12 | Koichi Tsuhara; Rikiichi Uchino; Katsuhiko Maki |
| The present invention is for, in a voltage-controlled oscillator in which the oscillation frequency can be adjusted using a capacitor array, reducing drift that occurs in the carrier frequency if the oscillation signal is subjected to frequency modulation after the control loop of the PLL circuit has been cut off. This voltage-controlled oscillator includes an oscillation circuit for performing an oscillation operation at a frequency that corresponds to an inductance and a capacitance between a first node and a second node, a first and second group of capacitors that have first terminals connected to the first node and the second node respectively, a first and second group of transistors that are respectively connected between a reference potential and second terminals of the first group and second group of capacitors, and a first and second group of resistors that are respectively parallel-connected to the first group and second group of transistors. | ||||||
| 205 | CIRCUIT ARRANGEMENT AND METHOD FOR CALIBRATING ACTIVATION SIGNALS FOR VOLTAGE-CONTROLLED OSCILLATORS | US14552173 | 2014-11-24 | US20150381185A1 | 2015-12-31 | Heinz WERKER |
| In order to develop a circuit arrangement (100) and also a method for calibrating at least one activation signal (Vbb) provided for a voltage-controlled oscillator (10) 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 (N) for at least one calibration oscillator (50) and at least one reference oscillator (30) associated with the calibration oscillator (50) is counted by means of at least one clock cycle counter (70) connected downstream of the calibration oscillator (50) and the reference oscillator (30) and a clock error (DE) resulting from the difference between these two numbers of clock cycles (N) is integrated and—that the clock error (DE) is converted by means of at least one digital-to-analogue converter (90) connected downstream of the clock counter (70) into analogue tuning signals (Vcm, Vcm−, Vcm+) from which the calibrated activation signal (Vbb) is derived. | ||||||
| 206 | System and Method for a Voltage Controlled Oscillator | US14808867 | 2015-07-24 | US20150333696A1 | 2015-11-19 | Saverio Trotta |
| In accordance with an embodiment, a voltage controlled oscillator (VCO) includes a VCO core having a plurality of transistors, a bias resistor coupled between collector terminals of the VCO core and a first supply node, and a varactor circuit coupled to emitter terminals of the VCO core. The bias resistor is configured to limit a self-bias condition of the VCO core. | ||||||
| 207 | Speed of light based oscillator frequency | US14036205 | 2013-09-25 | US09172326B2 | 2015-10-27 | Mihai A. Sanduleanu; Bodhisatwa Sadhu |
| An oscillator and a method of fabricating the oscillator are described. The oscillator includes a resonator with a plurality of transmission lines. An oscillation frequency of the oscillator is independent of at least one dimension of the plurality of transmission lines. The oscillator also includes a negative resistance circuit coupled to the resonator that cancels internal loss resistance of the resonator. | ||||||
| 208 | 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 | US20150280645A1 | 2015-10-01 | 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. | ||||||
| 209 | Circuit and Method for Adjusting Oscillating Frequency of an Oscillator | US14270377 | 2014-05-06 | US20150270842A1 | 2015-09-24 | Ronghui Kong; Dawei Guo |
| A circuit comprises an oscillator, a frequency divider and a comparator. The oscillator generates an oscillating signal (Fvco). The frequency divider is communicatively coupled to the oscillator, divides a frequency of the oscillating signal by a denominator and generates a divided signal. The comparator is communicatively coupled to the oscillator and the frequency divider, and is configured to obtain a first count of the divided signal (Fvco/N) within a predetermined time and a second count of a reference signal within the predetermined time; compare the first count with the second count, and generate a comparison result according to the first count and the second count. The oscillator is further configured to adjust the frequency of the oscillating signal according to the comparison result. | ||||||
| 210 | VCO GAIN ESTIMATION BY CAPACITIVE MEASUREMENT | US14220410 | 2014-03-20 | US20150268279A1 | 2015-09-24 | Emanuele LOPELLI; Charles Chang-I WANG; Salvatore PENNISI; Shervin MOLOUDI |
| Estimating a gain of a VCO in a PLL, including: means for matching to a varactor in the VCO; and means for estimating the gain of the VCO by calculating a C-V characteristic of the means for matching along with tank inductance and an output frequency of the VCO, wherein estimating the gain of the VCO by calculating the C-V characteristic of the means for matching allows the PLL to remain in operation during estimation. | ||||||
| 211 | Early notification of power loss in three phase meter | US13538159 | 2012-06-29 | US09099955B2 | 2015-08-04 | Anibal Diego Ramirez |
| A circuit arrangement generates an output oscillating signal indicative of voltage on any of plurality of line voltages. The circuit arrangement includes at least two zero-crossing detectors, a combiner, an integrator, and an oscillator. The first zero-crossing detection circuit detects a voltage level crossing on a first electrical signal corresponding to a first line voltage. The second zero-crossing detection circuit detects a voltage level crossing on a second electrical signal corresponding to a second line voltage. The combiner combines the output signals of the first zero-crossing detection circuit and the second zero-crossing detection circuit. The integrator is coupled to the output of the combiner. The oscillator has a control input and an oscillating signal output. The oscillator generates an oscillating signal at the oscillating signal output based on a signal present at the control input. The control input receives an output signal of the integrator. | ||||||
| 212 | Compensation for digitally controlled oscillator apparatus and method | US13997589 | 2011-11-09 | US09071253B2 | 2015-06-30 | Shenggao Li |
| Automatic digital sensing and compensation of frequency drift caused by temperature, aging, and/or other effects may be provided by including a compensation capacitor array and a sensing logic. The sensing logic may be configured to detect a drift in a first control signal and to provide the compensation capacitor array with a second control signal. The second control signal is configured to cause an adjustment of capacitance in the compensation capacitor array based on the detected drift in the first control signal. | ||||||
| 213 | Method for varying oscillation frequency of high frequency oscillator | US14112205 | 2011-06-22 | US09035707B2 | 2015-05-19 | Hideyuki Obata |
| The switching element is provided in a state of being electromagnetically coupled to the cavity resonator of the high frequency oscillator; the bias voltage applying terminal is connected to one electrode of the switching element; another electrode of the switching element is electrically connected to the cavity resonator (the anode shell in FIG. 1); the metal plate having a size enough for reflecting an electric wave to be transmitted before and after the switching element in a high-frequency manner is provided at any one end of the switching element; and by applying a bias voltage to the switching element and varying that, a reactance of the switching element is changed and a resonance frequency of the cavity resonator is varied. By this method, an oscillation frequency can be varied greatly relative to a small change in a bias voltage. | ||||||
| 214 | METHOD AND APPARATUS OF SYNCHRONIZING OSCILLATORS | US14075021 | 2013-11-08 | US20150130543A1 | 2015-05-14 | Chewn-Pu JOU; Huan-Neng CHEN |
| A circuit includes a first oscillator and a second oscillator. The first oscillator includes an inductive device, a capacitive device, and an active feedback device configured to output a first output signal having a predetermined frequency according to electrical characteristics of the inductive device of the first oscillator and electrical characteristics of the capacitive device of the first oscillator. The second oscillator includes an inductive device, a capacitive device, and an active feedback device configured to output a second output signal having the predetermined frequency according to electrical characteristics of the inductive device of the second oscillator and electrical characteristics of the capacitive device of the second oscillator. The inductive device of the first oscillator and the inductive device of the second oscillator are magnetically coupled. | ||||||
| 215 | SPEED OF LIGHT REFERENCED OSCILLATOR | US14154247 | 2014-01-14 | US20150084709A1 | 2015-03-26 | Mihai A. Sanduleanu; Bodhisatwa Sadhu |
| An oscillator and a method of fabricating the oscillator are described. The oscillator includes a resonator with a plurality of transmission lines. An oscillation frequency of the oscillator is independent of at least one dimension of the plurality of transmission lines. The oscillator also includes a negative resistance circuit coupled to the resonator that cancels internal loss resistance of the resonator. | ||||||
| 216 | Variable capacitance device | US13745613 | 2013-01-18 | US08981529B2 | 2015-03-17 | Yvan Morandini; Romain Debrouke |
| A variable capacitance device including: first and second transistors coupled in parallel between first and second nodes of the capacitive device, a control node of the first transistor being adapted to receive a control signal, and a control node of the second transistor being adapted to receive the inverse of the control signal, wherein the first and second transistors are formed in a same semiconductor well. | ||||||
| 217 | Semiconductor device | US14222822 | 2014-03-24 | US08941416B2 | 2015-01-27 | 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. | ||||||
| 218 | Systems and Methods of Stacking LC Tanks for Wide Tuning Range and High Voltage Swing | US13931675 | 2013-06-28 | US20150002236A1 | 2015-01-01 | Chun-Cheng Wang; Jianhua Lu |
| A cascaded arrangement of resonant tanks capable of widening frequency selection and tuning within an RF circuit is presented. Moreover, usage of DTC allows for larger frequency tuning per tank as well as handling of higher voltage swings while maintaining high linearity across the tuning range. | ||||||
| 219 | METHOD AND APPARATUS FOR PRODUCING THREE-PHASE CURRENT | US14186259 | 2014-02-21 | US20140241016A1 | 2014-08-28 | Ngai-Man HO; Gerardo ESCOBAR; Francisco CANALES |
| Exemplary embodiments are directed to methods and systems for producing a three-phase current to a three-phase output. Switching converters are used to generate a positive current, a negative current, and an intermediate current. The system is configured such that the produced positive current follows a path of a highest phase of a sinusoidal three-phase signal at a given time, the produced negative current follows a path of a lowest phase of the three-phase signal at the given time, and the produced intermediate current follows a path of a phase of the three-phase signal between the highest and the lowest phase at the given time. The produced currents are switched to each phase conductor of the three-phase output in sequence so that phase currents of the three-phase current are formed in the output conductors. | ||||||
| 220 | OSCILLATOR AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE | US14218580 | 2014-03-18 | US20140203882A1 | 2014-07-24 | 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. | ||||||
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