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7750752 Programmable SAW filter module  
Programmable SAW filter module are provided to overcome undesirable drawbacks, limitations and shortcomings associated with “in-line” SAW filters, such as insertion loss, propagation loss and...
6815867 Substrate usable for an acoustic surface wave device, a method for fabricating the same substrate and an acoustic surface wave device having the same substrate  
A base material made of C-faced sapphire single crystal is set on a susceptor installed in a reactor arranged horizontally. Then, a trimethyl-aluminum and an ammonia are introduced as raw material...
6559736 Integrated tunable surface acoustic wave with quantum well structure technology and systems provided thereby  
A ZnO monolithically integrated tunable surface acoustic wave (MITSAW) device uses tunable acousto-electric and acouso-optic interaction between surface acoustic waves (SAW) and a two dimensional...
6208062 Surface acoustic wave transponder configuration  
An acoustic wave identification transponder device, having a substrate, an electroacoustic transducer generating an acoustic wave in said substrate and a set of encoding elements disposed in a...
6029324 Acoustical-electronic component operating with acoustical surface waves as well as a tunable delay line, a resonator and a semiconductor sensor using the component  
An acoustical-electronic component operating with acoustical surface waves, includes a piezoelectric substrate in which an acoustical surface wave is guided and enters into interaction with an...
5422531 Electro-acoustic component of piezo ceramic material and method for frequency setting or, respectively, transit time balancing of the component  
Electrical components, such as filters, oscillators, resonators and delay lines are manufactured from a piezo ceramic base which includes a depolarized zone. The sound velocity is set by topically...
5351219 Acoustic device  
An acoustic device has an acoustic wave propagating medium exhibiting elastic abnormality in the vicinity of a Curie temperature. It is desirable that such an acoustic wave propagating medium be...
5318034 Electrically adjustable delay circuit and ultrasonic diagnosis apparatus  
This invention provides a delay circuit capable of electrically varying the delay amount comprising a first transistor for receiving a signal to be delayed from the base connected to an input...
5243307 Act device having optical control of saw velocity  
A high speed analog to digital converter system employs a set of ACT devices in parallel to buffer a high speed data sampling rate to the processing rate of the analog to digital converters...
5243556 Acoustic charge transport memory device  
A sampling device operating as a buffer between a first data signal and a relatively slow processing device accepts the input signal and stores samples of it on a SAW traveling past an input...
5194837 Multi-tap programming circuit for transversal filters  
A tapped delay line uses a varistor network for tap weighting. The varistors may be used in a resistive summing network or as amplifier gain control elements. In addition, the varistors can be...
5189330 Surface acoustic wave device  
An SAW convolver is disclosed, in which a pair of input transducer means disposed at the left and right end portions on a piezoelectric substrate having a velocity dispersion consists of a...
5159299 HACT electrode configuration  
A heterostructure acoustic charge transport (HACT) device having a number of signal tap electrodes has revealed unexpected insensitivity to electrode spacing and unexpected sensitivity to...
5144262 Acoustic charge transport selectable delay line and delay line oscillator formed therewith  
A delay device comprises a semi-conductor chip having acoustic charge transport channel disposed therein; a contact operably connected to and disposed at one end of the channel for injecting an...
5128734 Surface channel hact  
A simplified heterostructure charge transport device has a GaAs transport layer that is the top layer of the device, deposited on an (Al,Ga) As barrier layer for vertical confinement of charge...
5111168 Real-time, in-situ saw filter delay adjustment  
A method of adjusting the center frequency of a SAW device by providing a substrate capable of propagating a surface acoustic wave thereon having input transducer electrode on one end portion...
5051709 Saw device tapped delay line and equalizer  
A SAW device tapped delay line includes an apodized input IDT (inter-digital transducer) and a plurality of substantially identical unapodized output IDTs arranged to receive, after delays which...
5043620 Surface acoustic wave convolver and convolution integrator using same  
In an SAW convolver composed of a substrate having a multi-layered structure comprising at least a piezoelectric film, self convolution is suppressed by disposing a first and a second array...
4994772 Acoustic charge transport processor  
An acoustic charge transport (ACT) device is easily constructed to provide for variable carrier frequency operation or, alternatively, for variable time delays. Variable carrier frequency...
4960329 Chirp pulse echo ranging apparatus  
The difficulty of making Doppler shift velocity measurements in a chirp pulse echo ranging system is overcome by employing a pulse frequency compression filter, suitably a SAW compressor 45,...
4801818 Clock regeneration circuit  
A clock regeneration circuit which is formed as an integrated circuit except for a SAW (surface acoustic wave) filter module which can be used unaltered for a number of regeneration circuits which...
4757226 Surface acoustic wave convolver  
A monolithic SAW convolver comprises a piezoelectric film, an insulator, a semiconductive epitaxial film and a high-concentrated semiconductive substrate. The semiconductive epitaxial film has a...
4739290 Variable analog delay line  
A variable analog delay line apparatus utilizing a plurality of tapped SAW devices that are connected in series by single pole multi-throw switch units. The amount of delay is determined by the...
4697115 Surface acoustic wave device  
A surface acoustic wave device includes a semiconductor substrate, a piezoelectric film disposed on the semiconductor substrate, at least one pair of comb-shaped electrodes constituting an input...
4683395 Surface acoustic wave device  
A monolithic surface acoustic wave convolver has a structure of piezoelectric layer/insulative layer/p(n)-type semiconductive layer/n(p)-type semiconductive layer/n+ (p+)-type semiconductive...
4647789 Active element microwave phase shifter  
A continuously variable phase shifter for the phase range from 0° to 90°, switchable phase shifters switchable between 0° and 90° and a continuously variable phase shifter for the phase shift...
4625207 Surface acoustic wave passive transponder having amplitude and phase-modifying surface pads  
A passive transponder for use in an interrogation/transponder system comprises a substrate having a substrate surface defining a path of travel for surface acoustic waves; a launch transducer...
4553099 Electrostatic voltage sensor  
An electrostatic voltage sensor which includes a surface acoustic wave propagating medium and transmitting and receiving transducers coupled to the medium. The voltage sensor is provided with a...
4471255 Surface acoustic wave parametric device  
An surface acoustic wave device, especially amplifier which includes input and output means for electrical signals provided so as to be spaced on a surface of a piezoelectric material which...
4431944 Delay line having coupled cavities for a traveling-wave tube and a traveling-wave tube equipped with said line  
In the last section of a delay line having coupled cavities for a traveling-wave tube, the following parameters are progressively increased in the direction of propagation of the electron beam:...
4401956 Electronically variable time delay in piezoelectric media  
A variable delay line for surface acoustic waves includes spaced input and output transducers affixed on the wave-propagating surface of a piezoelectric substrate for sending and receiving...
4354166 Carrier concentration controlled surface acoustic wave resonator and oscillator  
A surface acoustic wave resonator formed on a semiconductive piezoelectric substrate (9) has arrays (10, 11) of reflector elements forming rectifying junctions with the substrate, a voltage is...
4342971 Continuously variable surface acoustic wave delay line  
A surface acoustic wave variable time delay includes a surface acoustic wave device (10) which is secured within a housing (30). The device (10) is provided with an input transducer (12) and an...
4340872 Continuously variable piezoelectric crystal delay line  
A continuously variable delay line (10) includes a piezoelectric crystal (12) having an input transducer (14) and an output transducer (16). An input signal is transmitted through input lines (18)...
4291283 Single-mode tunable oscillator using magnetostatic waves  
An oscillator including two magnetostatic wave delay lines of different lengths formed on the surface of a magnetic material, one of whose ends is common and made by a first microstrip coupler,...
4233573 Carrier concentration controlled surface acoustic wave variable delay devices  
An electrically controlled surface acoustic wave (SAW) delay unit includes a piezoelectric and semiconductive substrate having a segmented rectifying contact disposed on the surface of an...
4217564 Elastic surface wave device for treating high frequency signals  
The treatment is directly effected on the waves propagated. Zones, for creating interruptions in propagation, are created on the useful surface of the propagation material. Several parallel tracks...
4216401 Surface acoustic wave (SAW) pressure sensor structure  
An improved SAW pressure sensor structure includes a dual substrate sensor having a SAW substrate with a SAW delay line disposed in an active signal region on a first one of two parallel major...
4207546 Phase and amplitude programmable internal mixing SAW signal processor  
A SAW signal processor includes a plurality of FET taps having individually programmable source-drain bias which controls both the amplitude and the phase of the mixing efficiency of internal...
4177438 Surface acoustic wave modulator using single crystal films of lithium ferrite  
A surface acoustic wave (SAW) device formed by an unitary insulating, magostrictive ferrite, slab whose easy axis of magnetization is initially (prior to the application of a d.c. magnetic biasing...
4117424 Acoustic wave devices  
A crystalline body having two or more domains interfacing at respective domain walls is utilized as an acoustic wave device. Input and output transducers and, in some embodiments, acoustic wave...
4078186 Magnetically tuned, surface acoustic wave device  
A surface acoustic wave device having a thin magnetostrictive film deposi on the surface between its input and output transducers. A variable D.C. field is applied to the film to vary its...
4059831 Passive transponders using acoustic surface wave devices  
A passive transponder sensitive to electromagnetic pulses received in the form of surface acoustic waves. The device utilizes a plurality of interdigital transponders each consisting of a metallic...
4037175 VARIABLE DELAY DEVICE  
A ferroelectric wave transducer device comprising an unpoled ferroelectric substrate having a substantially sinusoidal poled region at a surface thereof. A metal plate electrode is disposed on the...
4023120 Surface wave programmable oscillator  
The present invention relates to surface elastic wave programmable oscillators. The oscillator in accordance with the invention comprises an amplifier and a feedback loop comprising a selective...
4013834 Ghost signal erasing system  
A ghost signal erasing system for television receivers in which a variable delay element utilizing the propagation of an elastic surface wave is used. The variable delay element includes a...
4005376 Electronically variable surface acoustic wave phase shifter  
An electrically variable surface acoustic wave phase shifter including a strate upon which a piezoelectric layer is deposited and separated therefrom by an insulating layer. An electrode is...
3936751 SWD FM detector and IF filter  
An SWD structure is employed in an FM receiver for signal demodulation and band limiting. An FM signal is applied to the input of an SWD patterned for bandwidth limitation. Two SWD output channels...
3924145 Surface wave device having a ferroelectric substrate with a sinusoidal pole region  
A ferroelectric surface wave transducer device comprising an unpoled ferroelectric substrate having a substantially sinusoidal poled region at a surface thereof. A metal plate electrode is...
3908137 Apparatus and method for triple transit signal cancellation in an acoustical surface wave device  
Apparatus and method for reduction of triple transit signals generated by the interaction between acoustic surface waves and transducer elements in acoustic surface wave devices. Input transducers...

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