Oscillators inventions 02/08

20080048791 - Low-power, low-jitter, fractional-n all-digital phase-locked loop (pll): A method for synthesizing frequencies with a low-jitter an all-digital fractional-N phase-locked loop (PLL) electronic circuit adapted to synthesize frequencies with low-jitter, wherein the electronic circuit comprises a digital phase-frequency detector (DPFD) operatively connected to a digital loop filter (DLF), wherein the DPFD adapted to receive a reference signal and... Agent: Gibb & Rahman, LLC

20080048787 - Analog phase controller: Disclosed are embodiments of a phase control circuit with an analog phase controller having first and/or second order integration.... Agent: Blakely Sokoloff Taylor & Zafman

20080048789 - Automatic frequency compensation for pulse width modulated rf level control: Preferred embodiments of the present invention provide systems and methods that automatically correct the desired on-time of switching elements as the resonant frequency changes, so as to maintain the correct proportional value.... Agent: Rothwell, Figg, Ernst & Manbeck, P.C.

20080048788 - Frequency tuning method for voltage controlled oscillator and phase locked loop using the same: A frequency tuning method for a voltage controlled oscillator includes outputting a first frequency selected from 2n discrete frequencies included in a frequency tuning range of the voltage controlled oscillator based on a predetermined control voltage and an n-bit control code during coarse tuning; outputting a third frequency corresponding to... Agent: F. Chau & Associates, LLC

20080048786 - Resonant coil for measuring specimen condition: An oscillator provides a reference signal having a phase. A tunable reactive circuit, including an induction coil, is driven by the fixed frequency reference signal of the oscillator with coil adapted to be positioned adjacent the specimen to generate an oscillating signal corresponding to the condition of the specimen. The... Agent: Christopher M. Goff (27839) Armstrong Teasdale LLP

20080048790 - Circuit simulator parameter extraction using a configurable ring oscillator: A configurable ring oscillator is operated in a first configuration so that an oscillating signal passes from a first node to a second node through a first signal path. A first measurement of an operational characteristic is made. The ring oscillator is operated in a second configuration where an oscillating... Agent: Qualcomm Incorporated

20080048792 - Oscillator: An oscillator including a substrate and a resonant tunneling diode including a gain medium provided on the substrate. The gain medium includes at least two quantum well layers and plural barrier layers for separating the quantum well layers from each other. The quantum well layers each have one of a... Agent: Fitzpatrick Cella Harper & Scinto

20080048793 - Amplitude regulating circuit: An amplitude regulating circuit for an oscillator with an input for a supply signal having an electrical quantity depending on an amplitude of an oscillation of the oscillator has a supply circuit with a control input for a first control signal and a supply output for the supply signal based... Agent: Slater & Matsil LLP

20080048794 - Transconductance and current modulation for resonant frequency control and selection: In various embodiments, the invention provides a frequency controller and a temperature compensator for frequency control and selection in a clock generator and/or a timing and frequency reference. The various apparatus embodiments include a resonator adapted to provide a first signal having a resonant frequency; an amplifier; a temperature compensator... Agent: Gamburd Law Group LLC

20080048795 - Voltage controlled oscillator, bias device for voltage controlled oscillator, bias adjustment program for voltage control oscillator: Disclosed is a voltage controlled oscillator including: a first element and a second element each passing a current therethrough varying based on a controlled signal; an oscillation circuit configured to generate an oscillation wave in each of a first state in which the current through the first element is current-inputted... Agent: Amin, Turocy & Calvin, LLP

20080042755 - Method and apparatus to provide digitally controlled crystal oscillators: Methods and systems to provide digitally controlled crystal oscillators are disclosed. One example method includes determining a state of an oscillator system and selecting a first output of a digitally controlled crystal oscillator or a second output of a second oscillator based on the determination. In an example implementation, the... Agent: Texas Instruments Incorporated

20080042754 - 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 to the oscillators and to the couplers, respectively. The cross coupling and tail current... Agent: Duane Morris, LLPIPDepartment

20080042756 - Hybrid stochastic gradient based digitally controlled oscillator gain kdco estimation: A novel hybrid stochastic gradient adaptation apparatus and method for calibrating the gain of an RF or non-RF digitally controlled oscillator (DCO). The adaptation algorithm determines a true stochastic gradient between a forcing function and its corresponding system measure to estimate the system parameters being adapted. A momentum term is... Agent: Texas Instruments Incorporated

20080042758 - Phase-locked loop: A phase-locked loop including a phase comparator, a charging/discharging unit, a low pass filter, a controlled oscillator, and a feedback unit is provided. The charging/discharging unit outputs a control signal according to the result of the phase comparator. The charging/discharging unit includes a compensation unit for compensating the control signal... Agent: J C Patents, Inc.

20080042757 - Robust false locking prevention in referenceless frequency acquisition: An output of an oscillator of a phase-locked loop is swept across a predetermined frequency range by varying control settings associated with the oscillator. A plurality of control settings that cause the oscillator to lock or falsely lock to the timing of an input data stream are determined at least... Agent: Zagorin O'brien Graham LLP

20080042759 - Pll circuit: A PLL circuit according to an embodiment of the present invention includes: a first charge pump circuit to control an output current in accordance with an output signal of a phase comparator; an integrating filter to remove a predetermined frequency component; a second charge pump circuit to output a larger... Agent: Mcginn Intellectual Property Law Group, PLLC

20080042771 - Variable capacitor circuit having linear capacitance variation and voltage controlled oscillator using the same: Provided is an apparatus having a variable capacitor circuit which is capable of obtaining a constant gain with respect to a whole control voltage by using a linear variable frequency characteristic for a variation of the control voltages, to thereby attain a wide variable frequency range. For this, a variable... Agent: Ladas & Parry LLP

20080042753 - Arrangement and method for determining a gradient factor for a digitally controlled oscillator, and phase locked loop: An arrangement for determining a gradient factor for a digitally controlled oscillator has a data alignment device and an identification device. The data alignment device can be supplied a modulation signal, a phase error signal and an oscillator control word. The data alignment device is configured to output a modulation... Agent: Thomas G. Eschweiler, Esq. Eschweiler & Associates LLC

20080042760 - Clock selection circuit and synthesizer: A clock selection circuit and synthesizer that is capable of selecting an optimum clock signal from among a plurality of clock signals in a short time. A reference-clock counter counts clock pulses in an inputted reference clock signal (REF). A clock counter counts clock pulses in one of the plurality... Agent: Arent Fox LLP

20080042761 - Method and system for operating a laser self-modulated at alkali-metal atom hyperfine frequency: The present invention provides a method and apparatus for making atomic clocks or atomic magnetometers as self-modulated laser systems based on the physics of push-pull optical pumping. An atomic vapor cell is required to be in the laser cavity. With proper conditions, spontaneous push-pull optical pumping can occur inside the... Agent: Mathews, Shepherd, Mckay, & Bruneau, P.A.

20080042762 - Rtd-hbt differential oscillator topology: The new RTD-HBT differential oscillator circuit topology is proposed. At the nodes of the inductors and varactors in the conventional differential oscillator topology, each the RTD is attached to increase the magnitude of the negative conductance, which results in performance improvement in both the RF output power and phase noise.... Agent: Greenblum & Bernstein, P.L.C

20080042763 - Method and apparatus to improve frequency stability of an integrated circuit oscillator: A simple low cost integrated circuit oscillator includes a capacitor coupled to be charged and discharged by first and second current sources. A first voltage follower circuit including a first bipolar transistor having a base is coupled to the capacitor. The first bipolar transistor is biased such that a voltage... Agent: Blakely Sokoloff Taylor & Zafman

20080042764 - Oscillation circuit capable of having stable oscillation in wide temperature range: An oscillation circuit includes a constant current source, a current mirror circuit configured to receive a constant input current from the constant current source and to output a current proportional to the constant input current, a first inverter configured to be driven with a quartz resonator to oscillate, an operational... Agent: Dickstein Shapiro LLP

20080042766 - Dfy of xtalcikchip: design for yield of trimming-free crystal-free precision reference clock oscillator ic chip: A Design For Yield (DFY) of Crystal Chip (XtalChip) is to have the high yield of high quality high accurate clock chip to be able to integrated in the SOC environment to save the production cost and board space, etc. The LC oscillation (LCO) tank has the constant oscillation amplitude... Agent: Min Ming Tarng, Ph. D.

20080042765 - Xtalclkchip: trimming-free crystal-free precision reference clock oscillator ic chip: A XtalClkChip based on the application of hierarchical circuit and noise circuit design on the RF circuits of LC oscillation tank and the multi-phase fractional PLL are developed. The XtalClkChip combines both the XtalChip and multi-phase fractional PLL to provide the customer's clock to customer directly. This XtalChip will replace... Agent: Min Ming Tarng, Ph.d.

20080042767 - Crystal oscillator emulator: An integrated circuit comprises a film bulk acoustic resonator (FBAR) circuit that generates a reference frequency. A temperature sensor senses a temperature of the integrated circuit. Memory stores calibration parameters and selects at least one of the calibration parameters as a function of the sensed temperature. A phase locked loop... Agent: Harness, Dickey & Pierce P.L.C

20080042768 - Dual-mode voltage-controlled oscillator: A novel form of an integrated variable inductor uses an on-chip transformer together with a variable capacitor. The variable capacitor can either be a varactor or a switched capacitor array and is connected to the secondary coil of the transformer. By changing the capacitance at the secondary coil of a... Agent: Heslin Rothenberg Farley & Mesiti PC

20080042770 - Oscillator: A high-performance crystal oscillator providing effective bias resistors with low power consumption and minimal substrate surface area. In various embodiments of the invention, a switched-capacitor resistor is operably coupled to circuit components, such as an oscillation source, a current source, an input buffer, or an amplifier to provide a bias... Agent: Hamilton & Terrile, LLP

20080042769 - Oscillator with stacked amplifier: Embodiments of the invention provide a low-power, high-gain amplifier for a crystal oscillator. In some embodiments, the oscillator amplifier circuit comprises two NMOS transistors stacked in series with a PMOS transistor. In various embodiments, each of the NMOS transistors is diode-connected through a resistor and has the input signal capacitively... Agent: Hamilton & Terrile, LLP

20080036544 - Method for adjusting oscillator in phase-locked loop and related frequency synthesizer: A frequency synthesizer is disclosed. The frequency synthesizer includes a phase-locked loop (PLL) provided with an oscillator, a switching unit for switching the PLL to either an open loop status or a closed loop status, and a setting device for adjusting an oscillator frequency of the oscillator according to a... Agent: North America Intellectual Property Corporation

20080036545 - Modulation device using frequency-shift keying: A frequency-shift modulation device includes an oscillating circuit, a phase-locked loop and a digital frequency modulation circuit. The oscillating circuit is connected to the phase-locked loop in order to produce a fixed-frequency clock signal. This clock signal is used for timing the frequency modulation circuit. A standard model crystal oscillator... Agent: Gardere Wynne Sewell LLP Intellectual Property Section

20080036543 - Phase-locked loop runaway detector: In a circuit having a runaway detector coupled to a phase-locked loop (PLL), the PLL may include a loop filter to receive a control voltage within the PLL and provide a filtered control voltage and a voltage-controlled oscillator to receive the filtered control voltage and provide an output clock signal.... Agent: Kenyon & Kenyon LLP

20080036546 - Electromagnetic sensor systems: Sensor circuits including an oscillator circuit.... Agent: Burns & Levinson, LLP

20080036547 - Voltage controlled oscillator, and pll circuit and wireless communication apparatus using the same: A voltage controlled oscillator 100 comprises an inductor circuit including inductors 101, 102; a variable capacitance circuit 110 which includes variable capacitance elements 111, 112 for changing a capacitance value in accordance with a voltage difference between both of two terminals thereof and capacitive elements 113, 114 for cutting a... Agent: Wenderoth, Lind & Ponack L.L.P.

20080036548 - Resonator for a voltage controlled oscillator and manufacturing method thereof: An LC resonator for a voltage controlled oscillator comprises an inductive transmission line, input and output ports connected to the transmission line, and a capacitor interconnected in the transmission line, wherein the transmission line is grounded in at least one end portion thereof. The inductive transmission line comprises a plurality... Agent: Baker Botts, L.L.P.

20080036549 - Microwave generator: A microwave generator has at least one resonator with two mutually opposite resonator electrodes which are separated by a spark gap. The spark gap breaks down when a high-voltage is applied. The resonator electrodes are designed in the area of the spark gap such that they result in a two-dimensional... Agent: Lerner Greenberg Stemer LLP

20080036550 - Voltage-controlled oscillator for multi-band and rf communication apparatus having the same: A voltage-controlled oscillator (VCO) for a multi-band receiver, and a radio-frequency (RF) communication apparatus having the same. The VCO includes at least two fine tune branches, that is, a main fine tune branch and an auxiliary fine tune branch. The main fine tune branch includes at least one variable capacitor... Agent: F. Chau & Associates, LLC

20080036551 - Voltage controlled oscillator having a bandwidth adjusted amplitude control loop: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate an output signal oscillating at a frequency in response to a first control signal and a second control signal. The second circuit may be configured to generate the second control signal in... Agent: Lsi Corporation

20080030282 - Injection-locked oscillator circuit: An ILO circuit has a plurality of oscillator stages which are coupled to one another by means of a “tank lock” coupling. The coupling leads to an improved synchronization of the individual oscillator stages and thus to a reduced phase noise. Any desired LC oscillator topology can be used, not... Agent: Dicke, Billig & Czaja

20080030281 - Phase locked loop circuits, offset pll transmitters, radio frequency integrated circuits and mobile phone systems: A PLL circuit equipped with a loop gain detecting circuit that can suppress the change of the loop gain. When detecting the loop gain, the frequency of the input signal to the second input (IN-2) of the phase detector is first changed, and the response corresponding to the change is... Agent: Miles & Stockbridge PC