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8917078 Frequency measuring device and odor sensor and electronic equipment which are provided with the frequency measuring device  
A frequency measuring device according to an embodiment of the invention includes a first resonator provided with a first adsorption film, a second resonator provided with a second adsorption...
8717046 Nanotube resonator devices  
A fully-functional radio receiver fabricated from a single nanotube is being disclosed. Simultaneously, a single nanotube can perform the functions of all major components of a radio: antenna,...
8531178 Ultrasound probe, method for manufacturing the same, and ultrasound diagnostic apparatus  
In an ultrasound probe (2) and a method for manufacturing the ultrasound probe (2) of the invention, an organic piezoelectric element (21) has a sheet-like form, and is directly or indirectly...
8525279 Single element three terminal piezoresistive pressure sensor  
Embodiments of the invention provide for three-terminal pressure sensors (“3-TPS”), a method of measuring a pressure with a 3-TPS, and a method of manufacturing a 3-TPS. In some embodiments, the...
8432151 Film-thickness measuring device using PLL circuit  
A phase comparator (4) for detecting a phase difference between a first signal and a second signal, a first oscillating circuit (1) for supplying the phase comparator with a reference signal as...
8379811 System and method for transmitting communication data  
A system and method for transmitting communication data of a fixed line phone include acquiring the communication data of the fixed line phone, writing the communication data into a radio...
8350578 Wiring nanoscale sensors with nanomechanical resonators  
A system, device, method, and apparatus provide the ability to wire a voltage sensitive device to a nanoelectromechanical system (NEMS) resonator. A voltage sensitive device is configured to...
8299777 Calculating a parasitic capacitance of an oscillator circuit  
Described herein are techniques for determining a board parasitic capacitance of a crystal oscillator circuit. A crystal's frequency is measured under load condition off-circuit. After coupling...
8018291 Transistor-based micrometric or nanometric resonant device  
The resonant device comprises an electromechanical resonator of nanometric or micrometric size that comprises a mobile element and a fixed element. Detection means provide detection signals...
7768276 Systems and methods for identifying problems with PZT elements of micro-actuators  
Systems and methods for identifying problems with PZT elements of micro-actuators are provided. In certain example embodiments, a voltage (e.g., a sine voltage) may be applied to a reference unit...
7276892 Resonator based spectrum analyzer and method  
A spectrum analyzer includes an array of frequency-selective bulk acoustic wave (BAW) resonators each tuned to a predetermined different resonant frequency. The spectrum analyzer further includes...
6972553 Sensor readout circuit  
A sensor readout circuit which provides a frequency signal output including a phase detector circuit responsive to an output signal from a sensor and an input signal to the sensor and configured...
6861854 Peizoelectric microactuator and sensor failure detection in disk drives  
A test device and method for testing one of a disk drive microactuator and a disk drive sensor that includes two piezoelectric elements. The test device includes a signal generator, signal...
6774614 Method and apparatus for detecting current  
An apparatus for detecting currents in a three-phase power transmission system includes a first detection circuit electrically coupled to a first phase of the three-phase transmission system, a...
6674291 Method and apparatus for determining and/or improving high power reliability in thin film resonator devices, and a thin film resonator device resultant therefrom  
The effects of electromigration have been shown to lead to damage of metal electrodes of electronic devices such as thin film resonator (TFR) devices in only a few hours, for a test input power...
6518778 Method of determining angle-of-cut  
Methods are included for determining deviations from φ=0° in test resonators based on the quasi-pure modes' displacement ratio variations with φ angle. A direct relationship between deviation from...
6515465 Method and apparatus for measuring harmonic load-pull for frequency multiplication  
A method for measuring harmonic load-pull including supplying a fundamental frequency signal to a frequency multiplication device under test and obtaining a target even-order multiplied frequency...
6489776 Non-contact mechanical resonance method for determining the near surface carrier mobility in conductors  
An apparatus using a resonator probe for determining an electronic property of a conductor across a dielectric. The apparatus has a device for inducing lateral mechanical oscillations of the...
6462530 Redundant rate sensor and method  
Redundant rate sensor and method in which inertial rate is monitored with a plurality of vibratory sensing elements mounted in a single enclosure, signals from the sensing elements are processed...
6320471 Method and device for computer supported determination of an oscillating region of an electrical circuit  
An electrical circuit having an oscillator and additional structural elements that are connected to the oscillator. In an iterative method, upon variation of circuit parameters of the additional...
6307287 High-efficiency moving-magnet loudspeaker  
A thermoacoustic driver incorporates a linear electrodynamic motor having electrical terminals and a moving part, a driver suspension housing, a piston, and a stiffness-enhancing device for...
5852794 Multiple frequency unambiguous phase detector for phacoemulsification system  
A method for determining the voltage current phase relationship of a piezoelectric phacoemulsification handpiece includes the steps of obtaining an AC voltage signal corresponding to the operating...
5644299 Ultrasonic material level measurement  
Apparatus for indicating material level that includes a pair of ultrasonic transducers on opposed sides of a space for receiving the material at the level to be detected. A swept frequency...
5594354 Method for measuring selected frequencies of a coupled-dual resonator crystal  
The present invention discloses a method for obtaining frequency parameters to determine the resonator frequencies, the synchronous peak separation frequency, and the normal center frequency of a...
4918372 Method of measuring the thermal hysteresis of quartz crystal resonators  
The thermal hysteresis of quartz crystal resonators is measured by exciting two modes of a quartz crystal of interest with an external frequency source at a preselected temperature, calculating...
4858159 Frequency-tuneable filter calibration  
An apparatus and method for calibrating a yttrium-iron-garnet-tuned filter (YTF) is disclosed. Instead of using both tune+span information from the 1st LO, only the sweep ramp used to span the 1st...
4649336 Automatic, self sustaining probe for measuring the work function  
An apparatus for measuring changes in the work function of a surface using a method devised by Kelvin and known as the "dynamic capacitor method". This apparatus comprises a system for monitoring...
4632501 Resonant electromechanical oscillator  
A resonant electromechanical oscillator which includes a base portion, a driven portion, a cantilevered sheet-form flexural suspension which spaces the driven portion from the base portion for...
4614919 Magnetostatic wave frequency analyzer apparatus  
A magnetostatic wave frequency analyzer apparatus utilizing forward volume waves. A single input transducer is arranged opposite a plurality of output transducers to receive the different...
4481857 System for tuning musical instruments  
A method and apparatus including electronic circuitry for tuning a musical instrument. When a tunable vibratory or frequency producing element of the instrument is actuated, the oscillations...
4447782 Apparatus for automatic measurement of equivalent circuit parameters of piezoelectric resonators  
A heterodyne zero-phase detector (A) produces a phase output signal whose phase varies with the phase difference between a selectively variable test signal and the same selectively variable test...
4412172 Method of measuring the thermal properties of a resonator  
The thermal properties of a crystal resonator are rapidly and inexpensively measured by first immersing the resonator into an ice water bath at 0° C. and monitoring the frequency of the resonator...
4314393 Method of manufacturing acoustic surface wave device  
A method of manufacturing an acoustic surface wave device comprising: forming two pairs of transducers, a multistrip coupler and lead patterns for electrically shorting at least one pair of the...
4299114 Method of testing the integrity of an ultrasonic system for sensing liquid-fluid interfaces  
An ultrasonic system for sensing a liquid-fluid interface comprises a support structure (10) to which a transmitting crystal (21) and a receiving crystal (22) are bonded in such a way that the...
4131852 Single dispersive delay line compressive receiver  
A wideband compressive receiver using only one surface acoustic wave (SAW) device in a time-multiplexed fashion. A short pulse into the SAW device generates a "downchirp" local oscillator sweep...
4112360 Apparatus and method for tuning electro-mechanical filter components  
Apparatus and method for tuning components of an electrical mechanical filter which includes a plurality of mechanical resonators coupled together with input and output resonators and other...
4093914 Method of measuring parameters of a crystal filter  
Dual resonator crystal filters have an input electrode, a common electrode, and an output electrode which provide two resonators coupled together. Mathematical formulas were derived to determine...
4034288 System for measuring the frequency of an electrical signal  
The present invention relates to system for measuring the frequency of an electrical signal. The device in accordance with the invention comprises, deposited upon a piezo-electric substrate a...
3955137 Adjustable frequency scanning signal processor  
A compressive or "microscan" signal processor adapted for the simultaneous measurement of multifrequency signal components which encompass a broad frequency spectrum. In accordance with one...
3832634 SPEED INDICATOR  
A speed indicator including a plurality of tuned reeds. A permanent magnet is mounted for rotation past the reeds which are so positioned that, upon oscillation of a particular reed at its...
3727718 SURFACE WAVE AMBIGUITY ANALYZER  
A surface-wave ambiguity analyzer comprising a substrate, capable of propting an acoustic surface wave on its surface, and a transmitting electroacoustic transducer, disposed upon the substrate,...
3700304 OPTICAL SWITCH MECHANISM  
An optical switching mechanism including a vibrator having a pair of parallel reeds which are sustained in vibration at a rate determined by the resonance characteristic of the vibrator, the free...
3667051 MULTI-CHANNEL FREQUENCY MONITOR  
A frequency monitor visually displays the operative accuracy of any selec channel from a source of multi-channel signals. The accuracy of operation of upper and lower frequency sidebands defining...
3660756 FREQUENCY SENSITIVE DETECTING AND MEASURING CIRCUITS BASED ON THE ACOUSTIC ELECTRIC EFFECT  
A detector consists of an acousto-electric oscillator biased above cut-off for spontaneous acousto-electric oscillations and stimulates into acousto-electric oscillations by the a.c. signal to be...
3548306 SURFACE WAVE SPECTRUM ANALYZER AND INTERFEROMETER  
3513309 PIEZOELECTRIC UNITARY DEVICE FOR EMITTING FLUORESCENCE AND AMPLIFYING RADIATION UNDER STIMULATION IN OPPOSITE DIRECTIONS  
3621547 METHOD FOR OPTIMUM MOUNTING OF PIEZOELECTRIC CERAMIC FILTER ELEMENTS  
3440534 DUAL REED COMB FILTER  
3413573 Microelectronic frequency selective apparatus with vibratory member and means responsive thereto  
3399316 Vibrating-reed type electric instrument with built-up field and coil support  

Matches 1 - 50 out of 87 1 2 >