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| Number | Title | Issue Date |
| 7961056 | Low phase noise voltage controlled oscillator Embodiments of the present invention include a low phase noise oscillator circuit using a current-reuse technique to reduce power consumption and improve phase noise, where the oscillator circuit comprises a first VCO coupled to a second VCO, and the outputs of the ... | 06/14/2011 |
| 7567135 | Power monitoring device and methods thereof To determine performance degradation at functional module in a normal power state due to a power control device, voltages are applied to oscillators at a power diagnostic module. A first voltage is a supply voltage for the data processing device, and a second voltag... | 07/28/2009 |
| 7420429 | Source coupled differential complementary colpitts oscillator A source coupled differential complementary Colpitts oscillator is described, which enables a differential oscillation and also can improve phase noise performance by source-coupling a complementary Colpitts oscillator using an inductor. A differential complementary... | 09/02/2008 |
| 7353011 | Method and apparatus for operating a PLL for synthesizing high-frequency signals for wireless communications A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitanc... | 04/01/2008 |
| 7342462 | Quadrature LC voltage controlled oscillator with opposed bias and coupling control stages A voltage controlled oscillator unit is provided with cross coupled voltage controlled oscillators to generate quadrature phases. One control stage adjusts coupling between the oscillators. Another control stage adjusts the tail current that applies operating bias t... | 03/11/2008 |
| 7342465 | Voltage-controlled oscillator with stable gain over a wide frequency range An apparatus and method for providing a stable gain over wide frequency range in a VCO are presented. A VCO uses a waveform generator along with a bias generator having a frequency select input. The frequency select input is used to adjust the amount of output curre... | 03/11/2008 |
| 7313369 | Communication semiconductor integrated circuit and radio communication system A communication semiconductor integrated circuit has an oscillator circuit forming part of a transmission PLL circuit fabricated on a single semiconductor chip together with an oscillator circuit forming part of a reception PLL circuit and an oscillator circuit for ... | 12/25/2007 |
| 7299678 | Sensor apparatus A measurement head particularly for borehole use can measure multiple parameters with no electronics in the head and only a single conductor cable. Double-ended tuning forks (26, 28 and 38, 40) in the head are arranged to respond to different parameter... | 11/27/2007 |
| 7289784 | Active tunable filter circuit An active tunable filter circuit for use as an integratable active filter in a mobile radio apparatus, comprises an active amplifier circuit (A) including a reactive feedback network including a first tunable element (L1) set to pass with amplification a want... | 10/30/2007 |
| 7225349 | Power supply voltage droop compensated clock modulation for microprocessors A voltage source droop compensated clock modulation for microprocessors is described. Specifically, the circuit reduces the clock frequency if a voltage source droop is detected. ... | 05/29/2007 |
| 7221920 | Voltage controlled oscillator, frequency synthesizer and communication apparatus A voltage controlled oscillator includes a resonator configured to resonate with an initial oscillation frequency during starting period of oscillation and a steady oscillation frequency during a steady state oscillation. The resonator includes a film bulk acoustic ... | 05/22/2007 |
| 7199671 | Systems and methods for clock generation using hot-swappable oscillators In one embodiment, a clock generation system comprises first and second hot-swappable oscillator (HSO) devices that generate respective timing signals, a plurality of controllable attenuators for controllably attenuating one of the timing signals, a combiner for com... | 04/03/2007 |
| 7199789 | Input apparatus having electrostatic sensor An input apparatus having a reduced-size electrostatic sensor that can precisely detect an input and then output a signal and, thus, has excellent responsiveness and reliability contains the following: clock signal generating means for generating clock signals; dela... | 04/03/2007 |
| 7190226 | Analog delay chain having more uniformly distributed capacitive loads and analog delay cell for use in chain A tapped delay chain comprises a plurality of delay cells where each cell has at least two output taps: a primary one for feeding forward a delayed signal to a next cell in the chain, and a secondary output tap for feeding a slightly-differently delayed signal to a ... | 03/13/2007 |
| 7164323 | Phase synchronous multiple LC tank oscillator A phase synchronous multiple LC tank oscillator includes a plurality of oscillator stages configured to oscillate synchronously. The phase of each of the plurality of oscillator stages is substantially the same. ... | 01/16/2007 |
| 7126432 | Multi-phase realigned voltage-controlled oscillator and phase-locked loop incorporating the same A multi-phase realigned voltage-controlled oscillator (MRVCO) achieves phase realignment based on charge injection in the VCO stages with the injection amount proportional to the instantaneous phase error between the VCO output clock and a reference clock. The MRVCO... | 10/24/2006 |
| 7109978 | Object position detector with edge motion feature and gesture recognition A method of generating a signal comprising providing a capacitive touch sensor pad including a matrix of X and Y conductors, developing capacitance profiles in one of an X direction and a Y direction from the matrix of X and Y conductors, determining an occurrence o... | 09/19/2006 |
| 7102453 | Oscillator circuit configuration The invention relates to an oscillator circuit configuration comprising in an LC-parallel oscillatory circuit and a transistor as an amplifying element. A compensating winding is associated with the parallel oscillatory circuit whereby the collector voltage of the t... | 09/05/2006 |
| 7040139 | Sensor arrangement A chemical sensing system has: an interrogation unit operable to wirelessly transmit an interrogation signal and wirelessly receive a response; an environmentally sealed container for holding a chemical analyte; a sensor array unit in fluid communication with the an... | 05/09/2006 |
| 7034623 | Voltage controlled oscillator apparatus, method, and system A voltage controlled oscillator includes two gain stages to split the bias current and reduce phase noise. ... | 04/25/2006 |
| 7015766 | CMOS voltage-controlled oscillator (VCO) with a current-adaptive resistor for improved linearity A voltage-controlled oscillator (VCO) for a phase-locked loop (PLL) has improved bandwidth and performance at lower frequency. A variable current source supplies a current to an internal oscillator-power node. The current varies with the VCO input voltage. The inter... | 03/21/2006 |
| 7005930 | Synchronously coupled oscillator A phase synchronous multiple LC tank oscillator includes a plurality of oscillator stages that are configured to oscillate synchronously. The phase of each of the plurality of oscillator stages is substantially the same and the plurality of oscillators are inductive... | 02/28/2006 |
| 6995618 | VCO feedback loop to reduce phase noise A phase adjustment module in a voltage controlled oscillator (VCO) samples a VCO oscillation to detect changes in the oscillation frequency and produces a corresponding correction voltage that is feedback to the VCO input to correct the frequency change. A plurality... | 02/07/2006 |
| 6993307 | Method and apparatus for operating a PLL with a phase detector/sample hold circuit for synthesizing high-frequency signals for wireless communications A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitanc... | 01/31/2006 |
| 6980034 | Adaptive, self-calibrating, low noise output driver An output buffer includes an output stage that includes a transconductance device configured to drive a capacitive load, and a first capacitor coupled to an input of the transconductance device. A converter converts an input clock signal into a current that is provi... | 12/27/2005 |
| 6970048 | Inductive-capacitive (LC) based quadrature voltage controlled oscillator (VCO) with deterministic quadrature signal phase relationship A circuit and method for generating quadrature signals with a deterministic phase relationship. Between two inductive-capacitive (LC) based quadrature voltage controlled oscillators (VCO), phase shift circuitry is interposed such that the individual LC VCO circuits ... | 11/29/2005 |
| 6965761 | Controlled oscillator circuitry for synthesizing high-frequency signals and associated method A method and apparatus for synthesizing high-frequency signals, such as wireless communication signals, includes a phase-locked loop (PLL) frequency synthesizer with a variable capacitance voltage controlled oscillator (VCO) that has a discretely variable capacitanc... | 11/15/2005 |
| 6930561 | Multi-band voltage controlled oscillator A single integrated chip has first and second voltage controlled oscillators and first and second buffers. The first voltage controlled oscillator has a first output defined by a first frequency band, and the second voltage controlled oscillator has a second output ... | 08/16/2005 |
| 6922111 | Adaptive frequency clock signal According to some embodiments, a clock signal having an adaptive frequency is provided. ... | 07/26/2005 |
| 6911870 | Quadrature voltage controlled oscillator utilizing common-mode inductive coupling A voltage controlled oscillator including a first oscillator circuit portion with at least one first inductor, and a second oscillator circuit portion with at least one second inductor, wherein the at least one first inductor and the at least one second inductor are... | 06/28/2005 |
| 6903617 | Method and apparatus for synthesizing high-frequency signals for wireless communications A semiconductor package includes a package substrate and an integrated circuit. The package substrate has a first surface. The integrated circuit couples electrically to the first surface of the package substrate. The integrated circuit and the package substrate tog... | 06/07/2005 |
| 6870429 | Variable rate modulator Clock signals and digital data signals at a variable frequency are introduced to the input of a FIFO and are passed from the FIFO at a second (or intermediate) frequency controlled by a numerically controlled oscillator. To regulate the frequency of the signals from... | 03/22/2005 |
| 6870432 | Unilateral coupling for a quadrature voltage controlled oscillator According to some embodiments, unilateral coupling is provided for a quadrature voltage controlled oscillator. For example, a first voltage controlled oscillator may be provided with a 0 degree phase node and a 180 degree phase node A second voltage controlled oscil... | 03/22/2005 |
| 6850122 | Quadrature oscillator and methods thereof A quadrature oscillator includes a master tuned oscillator and two injection-locked slave tuned oscillators. ... | 02/01/2005 |
| 6791423 | Quadrature coupled controllable oscillator and communication arrangement A quadrature coupled controlled oscillator comprising a first and a second circuit module, each of the circuit modules (100 and 100′) comprising an astable multivibrator circuit (103). The first circuit module is coupled with the second circui... | 09/14/2004 |
| 6788154 | Phase-locked loop with composite feedback signal formed from phase-shifted variants of output signal A phase-locked loop system and method are provided. The system may include an error detector configured to receive a reference signal, and a voltage-controlled oscillator subsystem coupled to the error detector. The voltage-controlled oscillator subsystem is typical... | 09/07/2004 |
| 6696897 | System and method for voltage controlled oscillator phase interpolation A system and method are provided for controlling the phase of a voltage controlled oscillator output. The method comprises: accepting a plurality of VCO outputs coarsely differentiated by phase; selecting one of the VCO outputs; finely modifying the phase... | 02/24/2004 |
| 6686806 | Ring VCO based on RC timing The present invention, generally speaking, provides a controlled oscillator that attains the foregoing objectives. The structure of the oscillator is, in general, that of a ring; however, timing of the oscillator is governed largely by an RC time constant... | 02/03/2004 |
| 6661297 | Multi-octave wideband voltage controlled oscillator A multi-octave, wideband voltage controlled oscillator has a plurality of high impedance current output individual voltage controlled oscillators coupled in parallel to form a bank of voltage controlled oscillators covering at least one high frequency oct... | 12/09/2003 |
| 6640311 | Redundant oscillator and method for generating a regulated signal A circuit includes a signal generator and a discriminator. The signal generator generates a plurality of reference signals where a majority of the reference signals have the same phase. The discriminator generates a regulated signal that has the same phas... | 10/28/2003 |
