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 |
|---|---|---|---|---|---|---|
| 141 | RESONANT UNIT, VOLTAGE CONTROLLED OSCILLATOR (VCO) IMPLEMENTING THE SAME, AND PUSH-PUSH OSCILLATOR IMPLEMENTING A PAIR OF VCOS | US15048427 | 2016-02-19 | US20160248142A1 | 2016-08-25 | Takeshi Kawasaki; Tsuneo Tokumitsu |
| A resonant circuit to be connected to a negative resistance unit is disclosed. The resonant circuit includes a pair of resonant transmission lines electrically coupled to each other and a coupling transmission line connecting the resonant transmission lines. The resonant transmission lines and the coupling transmission line are formed on a semiconductor substrate. The resonant transmission lines have a length corresponding to a quarter wavelength (λ/4) of twice of the resonant frequency attributed to the resonant circuit. | ||||||
| 142 | Split transformer based digitally controlled oscillator and DC-coupled buffer circuit therefor | US14831119 | 2015-08-20 | US09401677B2 | 2016-07-26 | 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. | ||||||
| 143 | Capacitive arrangement for frequency synthesizers | US14410153 | 2012-07-06 | US09379721B2 | 2016-06-28 | Cristian Pavao-Moreira; Dominique Delbecq; Jean-Stephane Vigier |
| An electronic device has a capacitive arrangement for controlling a frequency characteristic. The capacitive arrangement has varactor banks having a number of parallel coupled varactors and a control input for switching the respective varactors on or off. A main varactor bank has N varactors and a series varactor bank has A varactors, the main varactor bank being connected in series with the series varactor bank. A shunt varactor bank of B varactors may be coupled to a ground reference and connected between the main varactor bank and the series varactor bank. When a varactor is switched in the main varactor bank, it provides an equivalent capacitance step size (or frequency step) smaller than size of a capacitance step when switching a single varactor on or off. According to the number of varactors selected in the shunt varactor, B, this frequency step can be made programmable. By the arrangement of unitary varactors a very small step size is achieved for providing a high resolution of frequency of a digitally controlled oscillator. | ||||||
| 144 | System and method for a voltage controlled oscillator | US14323718 | 2014-07-03 | US09344035B2 | 2016-05-17 | Andrea Bevilacqua; Marc Tiebout |
| In accordance with an embodiment, an oscillator includes a tank circuit and an oscillator core circuit having a plurality of cross-coupled compound transistors coupled to the tank circuit. Each of the plurality of compound transistors includes a bipolar transistor and a field effect transistor (FET) having a source coupled to a base of the bipolar transistor. | ||||||
| 145 | Method and apparatus for producing three-phase current | US14186259 | 2014-02-21 | US09344005B2 | 2016-05-17 | 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. | ||||||
| 146 | METHOD FOR RE-CENTERING A VCO, INTEGRATED CIRCUIT AND WIRELESS DEVICE | US14606492 | 2015-01-27 | US20160065225A1 | 2016-03-03 | CRISTIAN PAVAO-MOREIRA; BIRAMA GOUMBALLA; YI YIN |
| A method of re-centering a voltage controlled oscillator of a wireless device comprising a phase locked loop circuit is described. The method comprises receiving an input frequency signal at a phase detector of the phase locked loop circuit from a frequency source; generating an oscillator signal based on the received frequency signal; selectably opening a feedback loop of the phase locked loop circuit when in a calibration mode of operation, performing coarse frequency tuning of the oscillator output signal; performing fine frequency tuning of a coarsely adjusted oscillator output signal; and closing the feedback loop. | ||||||
| 147 | Systems and methods of stacking LC tanks for wide tuning range and high voltage swing | US13931675 | 2013-06-28 | US09276547B2 | 2016-03-01 | 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. | ||||||
| 148 | LOW POWER WIDE TUNING RANGE OSCILLATOR | US14447478 | 2014-07-30 | US20160036382A1 | 2016-02-04 | Sudipto Chakraborty |
| A wide tuning range oscillator system uses multiple active cores with cross-coupled transistors and multiple tapped inductors having windings that can be connected to circuit nodes. These active cores are connected to a pair of symmetric tapping points and are switched ON/OFF by biasing elements. Biasing schemes and the topology of the individual cross-coupled cores may be different from each other. The tapping points are symmetrically arranged around the center point of the inductor. One or more of the active cores may be enabled for tuning the center frequency of the oscillator system. | ||||||
| 149 | System and Method for a Voltage Controlled Oscillator | US14323718 | 2014-07-03 | US20160006394A1 | 2016-01-07 | Andrea Bevilacqua; Marc Tiebout |
| In accordance with an embodiment, an oscillator includes a tank circuit and an oscillator core circuit having a plurality of cross-coupled compound transistors coupled to the tank circuit. Each of the plurality of compound transistors includes a bipolar transistor and a field effect transistor (FET) having a source coupled to a base of the bipolar transistor. | ||||||
| 150 | Circuit and method for adjusting oscillating frequency of an oscillator | US14270377 | 2014-05-06 | US09197228B2 | 2015-11-24 | 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. | ||||||
| 151 | Method and apparatus of a resonant oscillator separately driving two independent functions | US14108329 | 2013-12-16 | US09197222B2 | 2015-11-24 | Syed Enam Rehman |
| Capacitive adjustment in an RCL resonant circuit is typically performed by adjusting a DC voltage being applied to one side of the capacitor. One side of the capacitor is usually connected to either the output node or the gate of a regenerative circuit in an RCL resonant circuit. The capacitance loading the resonant circuit becomes a function of the DC voltage and the AC sinusoidal signal generated by the resonant circuit. By capacitively coupling both nodes of the capacitor, a DC voltage can control the value of the capacitor over the full swing of the output waveform. In addition, instead of the RCL resonant circuit driving a single differential function loading the outputs, each output drives an independent single ended function; thereby providing two simultaneous operations being determined in place of the one differential function. | ||||||
| 152 | Method and apparatus of synchronizing oscillators | US14075021 | 2013-11-08 | US09191014B2 | 2015-11-17 | 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. | ||||||
| 153 | Speed of light based oscillator frequency | US14154247 | 2014-01-14 | US09190953B2 | 2015-11-17 | 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. | ||||||
| 154 | High resolution millimeter wave digitally controlled oscillator with reconfigurable distributed metal capacitor passive resonators | US14027967 | 2013-09-16 | US09118335B2 | 2015-08-25 | Wanghua Wu; John Robert Long; Robert Bogdan Staszewski |
| A novel and useful millimeter-wave digitally controlled oscillator (DCO) that achieve a tuning range greater than 10% and fine frequency resolution less than 1 MHz. Switched metal capacitors are distributed across a passive resonator for tuning the oscillation frequency. To obtain sub-MHz frequency resolution, tuning step attenuation techniques are used that exploit an inductor and a transformer. A 60-GHz fine-resolution inductor-based DCO (L-DCO) and a 60 GHz transformer-coupled DCO (T-DCO), both fabricated in 90 nm CMOS, are disclosed. The phase noise of both DCOs is lower than −90.5 dBc/Hz at 1 MHz offset across 56 to 62 GHz frequency range. The T-DCO achieves a fine frequency tuning step of 2.5 MHz, whereas the L-DCO tuning step is over one order of magnitude finer at 160 kHz. | ||||||
| 155 | MONOLITHIC SIGNAL GENERATION FOR INJECTION LOCKING | US14179600 | 2014-02-13 | US20150229316A1 | 2015-08-13 | 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. | ||||||
| 156 | System and method for a voltage controlled oscillator | US14041931 | 2013-09-30 | US09099958B2 | 2015-08-04 | 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. | ||||||
| 157 | VARIABLE CAPACITOR STRUCTURE | US14146246 | 2014-01-02 | US20150188490A1 | 2015-07-02 | 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. | ||||||
| 158 | Piezoelectric vibrating piece, piezoelectric vibrator, oscillator, electronic device, and radio-controlled timepiece | US13837097 | 2013-03-15 | US09065037B2 | 2015-06-23 | Daishi Arimatsu |
| There is provided a piezoelectric vibrating piece including: a piezoelectric plate that includes a pair of vibrating arm portions, and a base portion which integrally fixes the base end portions of the pair of vibrating arm portions along a length direction; excitation electrodes which are formed on the vibrating arm portions and vibrate the vibrating arm portions; mounting electrodes which are formed on the base portion and mount the piezoelectric plate on external portions using a joining member; and leading-out electrodes which connect the excitation electrodes and the mounting electrodes, in which the leading-out electrodes are formed by folding back several times between the excitation electrodes and the mounting electrodes. | ||||||
| 159 | ULTRA-LOW VOLTAGE-CONTROLLED OSCILLATOR WITH TRIFILAR COUPLING | US14612415 | 2015-02-03 | US20150145612A1 | 2015-05-28 | 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. | ||||||
| 160 | SEMICONDUCTOR DEVICE | US14594256 | 2015-01-12 | US20150123716A1 | 2015-05-07 | 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. | ||||||
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