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Class 331/4 - Search sweep of oscillator

Subclass of Class 331 - Oscillators
Definition: Subject matter wherein means are provided, in addition to
No. of patents: 252
Last issue date: 12/27/2011

NumberTitleIssue Date
8085097Integrated ramp, sweep fractional frequency synthesizer on an integrated circuit chip
An integrated ramp, sweep fractional frequency synthesizer system on an integrated circuit chip includes an integrated circuit chip having a fractional frequency synthesizer with a fractional divider responsive to a VCO and a ΔΣ modulator for modifying the divisor...
7800451Frequency adjustment for clock generator
A fractional-N divider receives an input signal and supplies a divided signal divided in accordance with an integer divide control signal determined from a divide ratio. A phase interpolator is coupled to the fractional-N divider to adjust a phase of the divided sig...
7439815Method and apparatus for switching on an ultrasound oscillation system
In a method and a circuit arrangement for operating an ultrasound oscillation system, wherein an excitation voltage is applied to an ultrasound oscillation system comprising an ultrasound oscillator and components for forming an oscillation circuit for generating an...
7431728Ultrasound medical devices, systems and methods
Ultrasound medical devices, systems and methods are described. According to an example method, an absolute value of a first input to a voltage controlled oscillator (VCO) is determined. The VCO is in electrical communication with an acoustic assembly of an ultrasoun...
7409029Transmission device for automatically set an optimal point for a signal decision making
There is provided a flexible transmission device capable of automatically setting an optimal point for a signal decision making with high accuracy, so that highly reliable high-quality signal regeneration control is achieved. A clock timing extraction circuit dynami...
7373575Method and apparatus for generating expect data from a captured bit pattern, and memory device using same
Expect data signals are generated for a series of applied data signals having a known sequence to determine if groups of the data signals were properly captured. A first group of the applied data signals is captured, and a group of expect data signals are generated ...
7369633Method and apparatus for providing carrier synchronization in digital broadcast and interactive systems
An approach is provided for supporting carrier synchronization in a digital broadcast and interactive system. A carrier synchronization module receives one or more signals representing a frame that includes one or more overhead fields (e.g., preamble and optional pi...
7365608Digital frequency synthesiser and a method for producing a frequency sweep
A single chip digital frequency synthesiser (1) for synthesising a frequency swept synthesised output signal of a selectable frequency sweep comprises a direct digital synthesiser (5) which produces the frequency swept synthesised output signal on an o...
7365613Method of determining resonant frequency
A method for operating a torsion oscillator at its resonant frequency. The method performs an open-loop frequency sweep starting with nominal operation parameters saved from the factory or from a previous operation of the torsion oscillator. The sweep determines an ...
7362826Receiver including an oscillation circuit for generating an image rejection calibration tone
A receiver circuit includes an oscillator circuit configured to generate a calibration tone and a phase locked loop (PLL) reference signal. An output frequency of the VCO may be divided by respective amounts to derive a desired calibration tone frequency and a desir...
7353708Ultrasonic generator system
The system controls the frequency of an ultrasonic signal to be applied to a waveguide, such that the frequency corresponds to a preferred resonance mode of the waveguide and not to adjacent undesirable resonance modes. The system operates by carrying out a first sc...
7355484Oscillator and radar apparatus using the same
7353011Method 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...
7339406Sawtooth wave generating apparatus, a method of generating sawtooth wave, a constant current circuit, and a method of adjusting amount of current from the same
A sawtooth wave generating apparatus includes a base frequency generating section and a frequency generating section for generating the frequency of a reference signal, a sawtooth wave forming section which forms a sawtooth wave based on the reference signal, a volt...
7336106Phase detector and method having hysteresis characteristics
A phase detector generates a first output signal if a feedback clock signal leads a reference clock signal by more than a first time. The phase detector generates a second output signal if the feedback clock signal lags the reference clock signal by more than a seco...
7337216Electronic system architecture
An electronic system architecture comprises a plurality of client devices connected in a hierarchical structure in which the client devices form nodes in the structure interconnected by communications links. One client device at the top of the hierarchical structure...
7321735Optical down-converter using universal frequency translation technology
7315934Data processor and program for processing a data matrix
A data processor has sixteen processing elements that each include a register file and an arithmetic logic unit. A network unit connects between the register files of the processing elements and the arithmetic logic units of the processing elements. The network unit...
7312664Methods and apparatuses for testing a voltage-controlled oscillator (VCO) to verify operation across supply voltage and/or temperature
Methods and apparatuses for testing a calibrated VCO to determine whether the VCO has adequate fine frequency tuning capability. A range of coarse frequency tuning calibration settings are determined from coarse frequency tuning calibration settings obtained during ...
7292835Wireless and wired cable modem applications of universal frequency translation technology
7280061Digital-to-analog converter using a frequency hopping clock generator
Method and device for reducing the signal images at the output of a digital/analog converter. In a method for reducing the signal images at the output of a digital/analog converter, a frequency hopping clock generator provides a digital data signal whose data rate i...
7270646Ultrasonic operation apparatus for performing follow-up control of resonance frequency drive of ultrasonic oscillator by digital PLL system using DDS (direct digital synthesizer)
An ultrasonic driving apparatus consists mainly of a digital oscillatory circuit, an amplifier, a detection circuit, a phase difference detection circuit, a register, a data transfer circuit, and a switching circuit. The digital oscillatory circuit is used to drive ...
7265711High-frequency oscillator, high-frequency transmission-reception apparatus using the same, radar apparatus, and radar-apparatus-equipped vehicle and small boat equipped with the same
A high-frequency oscillator that can tune oscillation characteristics is provided. A high-frequency oscillator includes a Gunn diode serving as a high-frequency oscillation element that generates high-frequency signals, a resonator connected to the Gunn diode, a var...
7266062Noise removal using 180-degree or 360-degree phase shifting circuit
A noise removal circuit of the present invention comprises a 180-degree odd multiple shifting section for outputting a 180-degree shifted signal that is phase-shifted from an input signal by an odd multiple of 180 degrees and difference output section for outputting...
7262567Actuator driving apparatus
An actuator driving apparatus comprises the following. A start signal generator generates a start signal having a frequency substantially equal to the resonance frequency of the movable portion of an actuator. A rock detector detects rock of the movable portion. A d...
7251467Telecommunications using a tunable oscillator
Systems and techniques are disclosed relating to wireless communications. These systems and techniques involve wireless communications wherein a device may be configured to recover an information signal from a carrier using a reference signal, detect a frequency err...
7239188Locked-loop integrated circuits having speed tracking circuits therein
Clock generators include phase-locked and delay-locked loop integrated circuits that support efficient high speed testing of clock frequencies. An integrated circuit device is provided with a clock signal generator having at least one delay element therein that is r...
7236741Methods and apparatus for tuning in an inductive system
Electronic circuitry supports utilization of a series of pulses of varying width to tune a transducer (e.g., a coil that produces or receives a magnetic field) for transmitting or receiving. For example, a control voltage generator generates a sequence of digital pu...
7236541Translation loop modulator
A translation loop modulator for a transmission circuit in a communication system includes an input modulation unit for receiving at least one input signal that is representative of information to be modulated. The input modulation unit also receives a feedback sign...
7234070System and method for using a learning sequence to establish communications on a high-speed nonsynchronous interface in the absence of clock forwarding
A memory system includes a memory hub controller that sends write data to a plurality of memory modules through a downstream data bus and receives read data from the memory modules through an upstream data bus. The memory hub controller includes a receiver coupled t...
7229455Ultrasonic calculus treatment apparatus
An ultrasonic calculus treatment apparatus includes a longitudinal-vibration piezoelectric oscillator for vibrating in the axial direction of an ultrasonic transmitting member and a torsional-vibration piezoelectric oscillator for vibrating about the axial direction...
7218030Oscillating apparatus
An oscillating apparatus includes a driver generating a waveform signal based on a stored data for specifying a waveform so as to output the waveform signal to a transducer. A detector detects a phase difference between electric voltage and current supplied to the t...
7196587Waveform lineariser
An improved apparatus and method of generating swept frequency waveforms in the field of digital lineariser technology, using a phase-locked loop frequency synthesiser, is provided. Preferably, a ramp generator 120 is used to apply a modulation signal ...
7197293Absorbing sum signal energy in a mixer
A frequency mixer that generates out of phase sum signals and uses the out of phase relationship to absorb sum signal energy in an energy absorbing component. A frequency mixer according to the present teachings includes a set of mixing devices that generate a first...
7183863Self-initializing frequency detector
A phase-locked loop (PLL) locks onto an input signal to provide an output signal that is proportional in frequency to the input signal. The PLL also detects whether an input signal's frequency falls outside a predetermined range and, whenever the input signal's freq...
7176763Phase-locked loop integrated circuits having fast phase locking characteristics
A phase-locked loop (PLL) integrated circuit includes a voltage-controlled oscillator and a loop filter having first and second input terminals and an output terminal coupled to an input of the voltage-controlled oscillator. A charge pump and a phase-lock accelerato...
7171181Method for achieving immediate and accurate automatic frequency tuning
An automatic frequency tuning (AFT) system which can effect immediate and accurate automatic frequency tuning of the local oscillator (LO) of a receiver, in order to achieve a stable intermediate frequency (IF) signal while reducing the power consumption and the cos...
7168027Dynamic synchronization of data capture on an optical or other high speed communications link
A method and system that dynamically adjusts link control parameters of a communications network. The communications network includes a transmitter coupled through a first data link to a receiver. The transmitter and receiver each have at least one associated link c...
7159092Method and system for adjusting the timing offset between a clock signal and respective digital signals transmitted along with that clock signal, and memory device and computer system using same
A method and circuit adaptively adjust respective timing offsets of digital signals relative to a clock output along with the digital signals to enable a latch receiving the digital signals to store the signals responsive to the clock. A phase command for each digit...
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