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 |
|---|---|---|---|---|---|---|
| 101 | CR oscillation circuit | US14361411 | 2012-12-11 | US09209814B2 | 2015-12-08 | Kazushi Matsuo |
| In a CR oscillation circuit, resistance elements forming a series circuit include a first resistance element having a large temperature coefficient of resistance and a second resistance element having a smaller temperature coefficient of resistance than the first resistance element. At least one of a capacitor and an oscillation resistance element is trimmable. A first switching circuit connected between the series circuit and a non-inverting input terminal of a comparator is turned on when an output signal of the comparator is at a high level, and a second switching circuit is turned on when the output signal is at a low level. | ||||||
| 102 | Quartz crystal unit, quartz crystal oscillator and electronic apparatus | US13743460 | 2013-01-17 | US09209381B2 | 2015-12-08 | Hirofumi Kawashima |
| A quartz crystal unit comprises a quartz crystal tuning fork resonator having a quartz crystal tuning fork base, and first and second quartz crystal tuning fork arms. Each of the first and second quartz crystal tuning fork arms has a first main surface and a second main surface opposite the first main surface, and at least one groove formed in at least one of the first and second main surfaces of each of the first and second quartz crystal tuning fork arms. At least one mounting arm having a width less than 0.45 mm protrudes from the quartz crystal tuning fork base, and the overall length of the quartz crystal tuning fork resonator is less than 2.1 mm. | ||||||
| 103 | Class-F CMOS oscillator incorporating differential passive network | US14027635 | 2013-09-16 | US09197221B2 | 2015-11-24 | Masoud Babaie; Robert Bogdan Staszewski |
| A novel and useful oscillator topology demonstrating an improved phase noise performance that exploits the time-variant phase noise model with insights into the phase noise conversion mechanisms. The oscillator is based on enforcing a pseudo-square voltage waveform around an LC tank by increasing the third-harmonic of the fundamental oscillation voltage through an additional impedance peak. Alternatively, the oscillator is based on enforcing clipped oscillation waveform by increasing the second harmonic of the fundamental oscillation voltage through an additional impedance peak. This auxiliary impedance peak is realized by a transformer with moderately coupled resonating windings. As a result, the effective impulse sensitivity function (ISF) decreases thus reducing the oscillator's effective noise factor such that a significant improvement in the oscillator phase noise and power efficiency are achieved. | ||||||
| 104 | CAPACITIVE ARRANGEMENT FOR FREQUENCY SYNTHESIZERS | US14410153 | 2012-07-06 | US20150326235A1 | 2015-11-12 | Cristian PAVAO-MOREIRA; Dominique DELBECQ; Jean Stéphane 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. | ||||||
| 105 | COMPENSATION FOR DIGITALLY CONTROLLED OSCILLATOR APPARATUS AND METHOD | US14728877 | 2015-06-02 | US20150263741A1 | 2015-09-17 | 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. | ||||||
| 106 | Oscillation circuit, electronic apparatus, and moving object | US14034934 | 2013-09-24 | US09106237B2 | 2015-08-11 | Masayuki Ishikawa; Takehiro Yamamoto; Yosuke Itasaka |
| An oscillation circuit is connected to a resonator element (crystal resonator) and oscillates a resonator element to output an oscillation signal. The oscillation circuit includes an amplification element (inverter), and a set of variable capacitive elements having at least two variable capacitive elements, which are connected to an oscillation loop from an output to an input of the amplification element and the capacitance values thereof are controlled with potential differences between reference voltages and a variable control voltage. In each variable capacitive element of a set of variable capacitive elements, the common control voltage is applied to one terminal, and the reference voltage which differs between the variable capacitive elements is input to the other terminal. | ||||||
| 107 | LC oscillator process compensation circuit | US14457802 | 2014-08-12 | US09088290B2 | 2015-07-21 | Zhaolei Wu; Zhengxian Zou |
| An LC oscillator process compensation circuit includes an LC oscillator, a reference voltage terminal, a follower and a current auxiliary circuit, the LC oscillator includes a gain stage, an inductor and two voltage-controlled capacitors, the gain stage includes a first Field Effect Transistor, a second Field Effect Transistor, a third Field Effect Transistor and a fourth Field Effect Transistor, the current auxiliary circuit is connected with an external power source and the follower that connected with the reference voltage terminal to provide a working voltage for the LC oscillator, the follower includes a detection circuit to detecting current changes of the gain stage. The LC oscillator process compensation circuit has simple circuit structure and eliminates frequency changes of the LC oscillator caused by the process variations of the gain stage, thereby ensuring stability of the frequency of the LC oscillator, improving work precision and reducing design difficult. | ||||||
| 108 | FREQUENCY FINE TUNING | US14143158 | 2013-12-30 | US20150188489A1 | 2015-07-02 | Michael John Story |
| An oscillator including: an oscillating circuit for generating an output signal having an output signal frequency, the oscillating circuit including an inductive element and a capacitive element, the capacitive element having a variable capacitance for coarsely tuning the output signal frequency; and a current supply for supplying current to the oscillating circuit, the current supply being variable for finely tuning the output signal frequency. | ||||||
| 109 | High-IF superheterodyne receiver incorporating high-Q complex band pass filter | US14027849 | 2013-09-16 | US09014653B2 | 2015-04-21 | Iman Madadi; Massoud Tohidian; Robert Bogdan Staszewski |
| A novel and useful reconfigurable superheterodyne receiver that employs a 3rd order complex IQ charge-sharing band-pass filter (BPF) for image rejection and 1st order feedback based RF BPF for channel selection filtering. The operating RF input frequency of the receiver is 500 MHz to 1.2 GHz with a varying high IF range of 33 to 80 MHz. The gain stages are inverter based gm stages and the total gain of the receiver is 35 dB and in-band IIP3 at mid gain is +10 dBm. The NF of the receiver is 6.7 dB which is acceptable for the receiver without an LNA. The architecture is highly reconfigurable and follows the technology scaling. | ||||||
| 110 | LC OSCILLATOR PROCESS COMPENSATION CIRCUIT | US14457802 | 2014-08-12 | US20150102867A1 | 2015-04-16 | Zhaolei Wu; Zhengxian Zou |
| An LC oscillator process compensation circuit includes an LC oscillator, a reference voltage terminal, a follower and a current auxiliary circuit, the LC oscillator includes a gain stage, an inductor and two voltage-controlled capacitors, the gain stage includes a first Field Effect Transistor, a second Field Effect Transistor, a third Field Effect Transistor and a fourth Field Effect Transistor, the current auxiliary circuit is connected with an external power source and the follower that connected with the reference voltage terminal to provide a working voltage for the LC oscillator, the follower includes a detection circuit to detecting current changes of the gain stage. The LC oscillator process compensation circuit has simple circuit structure and eliminates frequency changes of the LC oscillator caused by the process variations of the gain stage, thereby ensuring stability of the frequency of the LC oscillator, improving work precision and reducing design difficult. | ||||||
| 111 | System and Method for a Voltage Controlled Oscillator | US14041931 | 2013-09-30 | US20150091663A1 | 2015-04-02 | 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. | ||||||
| 112 | VOLTAGE-CONTROLLED OSCILLATOR, SIGNAL GENERATION APPARATUS, AND ELECTRONIC DEVICE | US14384248 | 2013-03-11 | US20150077193A1 | 2015-03-19 | 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. | ||||||
| 113 | Ultra-low voltage-controlled oscillator with trifilar coupling | US13744497 | 2013-01-18 | US08957739B2 | 2015-02-17 | 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. | ||||||
| 114 | CR OSCILLATION CIRCUIT | US14361411 | 2012-12-11 | US20140340164A1 | 2014-11-20 | Kazushi Matsuo |
| In a CR oscillation circuit, resistance elements forming a series circuit include a first resistance element having a large temperature coefficient of resistance and a second resistance element having a smaller temperature coefficient of resistance than the first resistance element. At least one of a capacitor and an oscillation resistance element is trimmable. A first switching circuit connected between the series circuit and a non-inverting input terminal of a comparator is turned on when an output signal of the comparator is at a high level, and a second switching circuit is turned on when the output signal is at a low level. | ||||||
| 115 | Resonant circuit with automated trimming capabilities | US13719011 | 2012-12-18 | US08890633B2 | 2014-11-18 | Sven Simons |
| According to an example embodiment, a device includes a resonant circuit configured and arranged to provide a peak current flow at a resonance frequency. A trimming circuit provides variable impedances to the resonant circuit and thereby changes the resonance frequency for the resonant circuit. A driver circuit is configured to generate a trimming signal that oscillates at a desired frequency. A switch circuit couples and decouples the driver circuit to the resonant circuit for driving the resonant circuit with the trimming signal. An amplitude detection circuit detects amplitudes for signals generated in response to the trimming signal being connected to the resonant circuit. A processing circuit correlates detected amplitudes from the amplitude detection circuit with different impedance values of the variable trimming circuit. | ||||||
| 116 | Voltage controlled oscillator | US13713599 | 2012-12-13 | US08797107B2 | 2014-08-05 | Dong-Uk Sim; Young Jun Chong; Yong Moon; Hyeon Seok Jang |
| A voltage controlled oscillator includes a split ring resonator (SRR) configured to have meta-material characteristics fabricated on a board, and an energy compensation circuit configured to cause resonant oscillation of the SRR. The energy compensation circuit is fabricated in the form of an integrated circuit. | ||||||
| 117 | Semiconductor device | US13606440 | 2012-09-07 | US08736315B2 | 2014-05-27 | 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. | ||||||
| 118 | RESONATOR DEVICE, ELECTRONIC DEVICE, ELECTRONIC APPARATUS, AND MOBILE OBJECT | US13950353 | 2013-07-25 | US20140035685A1 | 2014-02-06 | Seiichi Chiba |
| A resonator device includes a base substrate having a fixation section to be attached to a mounting board and a free end, a resonator element having one end connected to a connection section located on the free end side of the base substrate, and a lid member adapted to airtightly seal the resonator element in a space between the lid member and the base substrate. | ||||||
| 119 | Method and apparatus of a resonant oscillator separately driving two independent functions | US13340790 | 2011-12-30 | US08618891B2 | 2013-12-31 | 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. | ||||||
| 120 | OSCILLATOR DEVICE AND MANUFACTURING PROCESS OF THE SAME | US13689430 | 2012-11-29 | US20130135056A1 | 2013-05-30 | Giorgio Allegato; Paolo Ferrari; Laura Maria Castoldi; Benedetto Vigna |
| An oscillator device includes: a structural layer extending over a first side of a semiconductor substrate; a semiconductor cap set on the structural layer; a coupling region extending between and hermetically sealing the structural layer and the cap and forming a cavity within the oscillator device; first and second conductive paths extending between the substrate and the structural layer; first and second conductive pads housed in the cavity and electrically coupled to first terminal portions of the first and second conductive paths by first and second connection regions, respectively, which extend through and are insulated from the structural layer; a piezoelectric resonator having first and second ends electrically coupled, respectively, to the first and second conductive pads, and extending in the cavity; and third and fourth conductive pads positioned outside the cavity and electrically coupled to second terminal portions of the first and second conductive paths. | ||||||
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