Oscillators inventions 02/06

20060038620 - Phase lock loop with continuous calibration and method therefor: A circuit includes a phase lock loop circuit and a continuous phase lock loop calibration circuit. The continuous phase lock loop calibration circuit is operatively coupled to the PLL circuit and produces a continuous calibration signal based on a reference voltage from a reference voltage circuit to calibrate the PLL...

20060038621 - Semiconductor devices with inductors: Semiconductor devices provided with high performance high-frequency circuits that reduce interference caused by inductors are provided. In the semiconductor device including a modulator circuit to modulate a carrier wave by a base band signal to output an RF signal and a demodulator circuit to demodulate the RF signal by use...

20060038622 - Voltage scaling using material-based reference model: An electronic circuit including an oscillator and having known physical device characteristics is operated by supplying a core voltage to the electronic circuit from a cold start, measuring output frequency of the oscillator during the cold start, and determining a material index from the output frequency based on the physical...

20060038623 - High frequency distributed oscillator using coupled transmission line: The present invention relates to a distributed oscillator, and more particularly, to a high frequency distributed oscillator using coupled transmission lines. According to the present invention, coupled transmission lines capable of increasing the frequency selectivity are used as transmission lines. Signal interference occurs among the coupled transmission lines because of...

20060038624 - Oscillator system, method of providing a resonating signal and a communications system employing the same: An nth-order oscillator system for providing a resonating signal, a method of generating a resonating signal and a communications system. In one embodiment, the nth-order oscillator system, n being greater than two, includes (1) an amplifier configured to provide an intermediate signal and (2) a feedback loop including an nth-order...

20060038625 - Oscillator circuit for eeprom high voltage generator: A semiconductor oscillator circuit for an EEPROM high voltage charge pump utilizes a current generating means to charge a first and a second capacitor alternatively. The charging current produced by the current generating means is inversely proportional to the ambient temperature. The charging current is proportional to the supply voltage...

20060038626 - Electronic circuit with means of evaluating its temperature, method for evaluating the temperature, and application: An electronic circuit (CE) is provided with an oscillator (OSC—1) outputting a signal (S1) with a frequency (F1) varying as a function of the temperature (Tc) of this circuit, and receiving or outputting a signal (S2) with a fixed and known frequency (F2). This circuit includes a measurement module (MSR)...

20060038627 - Pwm controller with temperature regulation of switching frequency: A circuit for controlling the switching frequency of an oscillator for a PWM controller for a switching mode power supply, comprising a first stage providing a signal which is related to the temperature of the controller for the switching mode power supply; and an oscillator having an oscillation frequency and...

20060038629 - Local oscillating circuit for receiving high-band and low-band signal: A local oscillating circuit includes an integrated circuit that has an oscillating transistor, protection diodes against electrostatic damage, and first and second terminals each being connected to a base and a collector of the oscillating transistor, cathodes of the protection diodes being respectively connected to the first and second terminals...

20060038628 - Voltage-controlled oscillator: A voltage-controlled oscillator for generating differential output is disclosed. The voltage-controlled oscillator comprises a Colpitts oscillator having a first inductor and a capacitive divider having at least two capacitors connected in series. A varactor is connected in series with the capacitive divider and to a reference voltage, and a second...

20060033583 - Frequency adjustment circuit: A frequency adjustment circuit that maintains a target frequency even when frequency adjustment data of zapping circuit is changed by an external noise is offered. The frequency adjustment circuit includes a reset signal generation circuit, a frequency adjustment data latch circuit that latches and retains the frequency adjustment data ZP1...

20060033582 - Gain calibration of a digital controlled oscillator: A novel apparatus for and a method of estimating, calibrating and tracking in real-time the gain of a radio frequency (RF) digitally controlled oscillator (DCO) in an all-digital phase locked loop (ADPLL). Precise setting of the inverse DCO gain in the ADPLL modulating path allows direct wideband frequency modulation that...

20060033580 - Phase locked loop for controlling an optical recording device and method thereof: A PLL system for generating an output signal according to a first reference signal is disclosed. The output signal is used as a reference clock to write recording data on an optical medium. The PLL system includes a clock generator for receiving the first reference signal and a first frequency-divided...

20060033581 - Wide frequency range agile voltage controlled oscillator: A voltage controlled oscillator that can rapidly change frequencies over a wide range is disclosed. The voltage controlled oscillator has a transistor having a base, an emitter and a collector. An output port and a power supply port are connected to the collector. A high pass filter is connected between...

20060033584 - Variable inductor, oscillator including the variable inductor and radio terminal comprising this oscillator, and amplifier including the variable inductor and radio terminal comprising this amplifier: An amplifier comprises an amplifier circuit which comprises a first inductor as an impedance element for degeneration, and a control circuit which has a second inductor electro-magnetically connected to the first inductor, and changes a control current flowing through the second inductor to change an inductance value of the first...

20060033585 - Magnetometer having an electromechanical resonator: In one embodiment, a magnetometer includes an electromechanical resonator coupled to a drive-and-detect (DD) circuit. The resonator has a deformable beam that is a part of a closed current path. By applying a periodic drive signal to a drive electrode located in proximity to the deformable beam, the DD circuit...

20060033586 - Low noise, hybrid tuned wideband voltage controlled oscillator: An oscillator comprising an active device having first, second and third terminals, a plurality of micro-stripline resonators coupled together to form a coupled-resonator network, the coupled-resonator network being coupled to the second terminal of the active device and a tuning network coupled to the coupled-resonator network, the tuning network being...

20060033587 - Coupled-inductor multi-band vco: A multi-band VCO employs a coupled-inductor based resonator having N≧2 ports. Each port has an inductor and at least one capacitor. The N inductors for the N ports are magnetically coupled. The inductors/ports may be selectively enabled and disabled to allow the VCO to operate at different frequency bands. The...

20060033589 - Frequency and/or phase compensated microelectromechanical oscillator: There are many inventions described and illustrated herein. In one aspect, the present invention is directed to a compensated microelectromechanical oscillator, having a microelectromechanical resonator that generates an output signal and frequency adjustment circuitry, coupled to the microelectromechanical resonator to receive the output signal of the microelectromechanical resonator and, in...

20060033588 - Resonant micro-electro-mechanical system with analog driving: A resonant micro-electro-mechanical system includes a microstructure having a mass which is free to oscillate in accordance with a predetermined degree of freedom, and a driving device coupled to the mass for maintaining the mass in oscillation at a resonance frequency. The driving device includes a differential sense amplifier supplying...

20060033590 - Oscillator circuit: An oscillator circuit includes first and second transistors forming a differential pair, an output combiner connected to first terminal sides of the first and second transistors, and a current source connected to second terminal sides of the first and second transistors....

20060033591 - Voltage-controlled oscillators with controlled operating range and related bias circuits and methods: A voltage-controlled oscillator includes a bias circuit and a delay circuit. The bias circuit may generate a bias voltage signal pair having levels that are based on the voltage level of an input voltage signal and that are constrained by the values of a maximum current signal and a minimum...

20060028281 - Highly-linear signal-modulated voltage controlled oscillator: A VCO system embodying the features of the present invention includes a frequency tuning circuit, a modulation circuit coupled in a parallel fashion with the frequency tuning circuit, a band tuning circuit coupled with the frequency tuning circuit in a parallel fashion having at least one switching circuit, a core...

20060028282 - Signal modulated voltage controlled oscillator system: Improved voltage controlled oscillator (VCO) circuits are disclosed. A symmetrical voltage controlled oscillator (VCO) system according to the embodiments of the present invention comprises a frequency tuning circuit containing one or more varactors for receiving a predetermined tuning signal and a frequency tuning bias signal for altering capacitances of the...

20060028283 - Symmetrical linear voltage controlled oscillator: A system is provided to improve frequency stability and system linearity in voltage controlled oscillators. A symmetrical voltage controlled oscillator system embodying the present invention comprises a frequency tuning circuit for receiving a frequency tuning signal, a band tuning circuit coupled with the frequency tuning circuit in a parallel fashion...

20060028284 - Phase-locked loop circuit: A PLL circuit comprising a loop filter with at least a first and a second bandwith is provided. The first bandwith of the loop filter is determined by a first network of circiut components and used out of the linear range of the PLL circuit and the second bandwith is...

20060022757 - Circuits and methods for detecting phase lock: In a phase-locked loop circuit including a lock detection function, the phase-locked loop circuit includes a lock detection circuit. The lock detection circuit includes a lock-window-entry detection circuit and a lock-detection-signal generation circuit. The lock-window-entry detection circuit detects a front edge of an up signal or a down signal generated...

20060022758 - Direct modulator for shift keying modulation: A system for direct modulation is disclosed. Embodiments of the direct modulator for shift-keying modulation include impressing baseband data on a radio frequency (RF) signal at an oscillator by controlling a digital divider using a sigma-delta modulator....

20060022759 - Reset signal generators for a frequency-phase detector and methods of generating reset signals for the same: Reset signal generators for a frequency-phase detector include a first signal source circuit is coupled to a pump-up signal of the frequency-phase detector. The first signal source circuit includes a first load therein establishing a voltage level at a first node when a first current flows through the first load....

20060022760 - Current-controlled oscillator: The present invention provides a current controlled oscillator comprising a first section providing a first differential output and a second section providing a second differential output. A loading structure comprised of resistive and reactive elements electrically connects the first differential output with the second differential output. The resistive and reactive...

20060022761 - Chip-scale atomic clock (csac) and method for making same: A clock including: a portable, at least partially evacuated housing; a cell being positioned within the housing and including an internal cavity having interior dimensions each less than about 1 millimeter, an intra-cavity pressure of at least about 760 Torr, and containing a metal atomic vapor; an electrical to optical...

20060022762 - Surface mount crystal oscillator: A surface mount quartz crystal oscillator includes: a quartz crystal unit having a plurality of first connection terminals on its bottom surface, and a mounting substrate formed with a depression, which accommodates an IC chip inside the depression. The side of the mounting substrate having the opening of the depression...

20060022763 - Temperature compensated piezoelectric oscillator and electronic apparatus comprising it: A temperature-compensated piezoelectric oscillator includes an AT-cut quartz crystal resonator, an amplifying circuit connected to one end of the quartz crystal resonator, a varactor diode connected to the other end of the quartz crystal resonator, and a temperature compensation voltage generation circuit connected to ends of the varactor diode via...

20060022764 - Frequency and/or phase compensated microelectromechanical oscillator: There are many inventions described and illustrated herein. In one aspect, the present invention is directed to a compensated microelectromechanical oscillator, having a microelectromechanical resonator that generates an output signal and frequency adjustment circuitry, coupled to the microelectromechanical resonator to receive the output signal of the microelectromechanical resonator and, in...