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| Number | Title | Issue Date |
| 7372897 | Portable information communication terminal, program, and recording medium The number of times for averaging operation for averaging a correlation value of a received signal and a reference signal is properly controlled. When the correlation value is not averaged, since a lower limit value TH_A of a correlation level of a distribution of t... | 05/13/2008 |
| 7352800 | Method of partial parallel interference cancellation A method of Partial Parallel Interference Cancellation (PPIC) is provided for recursively eliminating the Multiple Access Interference from a received signal. Such method is to use a recursion way to eliminate all the Multiple Access Interference (MAI) one by one fr... | 04/01/2008 |
| 7248635 | Method and apparatus for communicating computer data from one point to another over a communications medium The present invention is directed toward a communications channel comprising a link level protocol, a driver, a receiver, and a canceller/equalizer. The link level protocol provides logic for DC-free signal encoding and recovery as well as supporting many features i... | 07/24/2007 |
| 7237564 | Distribution of energy in a high frequency resonating wafer processing system A transducer for use in an acoustic energy cleaner is provided. The transducer includes a resonator and a plurality of crystals bonded to a surface of the resonator. The plurality of crystals is configured to be bonded to the surface of the resonator in a staggered ... | 07/03/2007 |
| 7230365 | Surface acoustic wave apparatus and manufacturing method therefor In a manufacturing method for a SAW apparatus a first insulating layer is formed on the entire surface of a piezoelectric LiTaO3 substrate. By using a resist pattern used for forming an IDT electrode, the first insulating layer in which the IDT electrode ... | 06/12/2007 |
| 7218189 | SAW component with adhesive location and use thereof The invention is an adhesive, in particular, for components that operate with surface acoustic waves, including a polymer matrix filled with mineral filler particles. The filler is selected from non-conductive or semi-conductive materials and is contained in the adh... | 05/15/2007 |
| 7213314 | Method of forming a surface acoustic wave (SAW) filter device A SAW filter includes a piezoelectric substrate of Lithium Niobate or optionally Lithium Tantalate having a thickness of at least twice an acoustic wavelength. The piezoelectric substrate is bonded to a surrogate substrate of a silicon material. The surrogate substr... | 05/08/2007 |
| 7151424 | Boundary acoustic wave device A boundary acoustic wave device includes a first boundary acoustic wave element, and a second boundary acoustic wave element disposed on the first boundary acoustic wave element. Each boundary acoustic wave element includes a first solid layer made of a piezoelectri... | 12/19/2006 |
| 7045933 | Flat actuator or sensor with internal prestress A flat multilayered component for use as an actuator or a sensor, is described. The flat multilayered component contains a layer of electrically activatable material, a passive middle layer disposed adjacent the layer of electrically activatable material, and a furt... | 05/16/2006 |
| 7046096 | Oscillator circuit, oscillator circuit adjusting method, and mass measuring apparatus using oscillator circuit An oscillator circuit is a closed loop including an amplifying circuit and a feedback circuit. The amplifying circuit includes a pair of amplifiers, which also function as impedance buffers, and a first phase-shift circuit. The feedback circuit includes a second pha... | 05/16/2006 |
| 7042131 | Surface acoustic wave device A surface acoustic wave device includes, on a piezoelectric substrate, at least one surface acoustic wave filter and at least one surface acoustic wave resonator that is connected in series and/or parallel to the surface acoustic wave filter. A film having a positiv... | 05/09/2006 |
| 7034433 | Surface acoustic wave device A surface acoustic wave device has a high electromechanical coefficient and reflection coefficient, and also has an improved frequency-temperature characteristic that is achieved by forming a SiO2 film on an IDT so as to prevent cracking from occurring on... | 04/25/2006 |
| 7034441 | Surface mount crystal unit and surface mount crystal oscillator A surface mount crystal unit comprising a crystal blank, a planar mounting substrate made of silicon and a cover having a shape with a recess and made of glass containing ions having high mobility. The mounting substrate and the cover are bonded by means of anode bo... | 04/25/2006 |
| 7003199 | Tunable dispersion compensator for optical communication system The present invention relates to a tunable distribution compensator, including: an optical fiber having a chirped optical fiber grating; first and second frames having first and second stepped portions, respectively, wherein the first stepped portion is symmetricall... | 02/21/2006 |
| 6996882 | Method for producing a surface acoustic wave element A surface acoustic wave element includes a laminated substrate where a first substrate made of a piezoelectric material is laminated over a second substrate made of a material different from that of the first substrate, and at least one pair of comb-shaped electrode... | 02/14/2006 |
| 6980061 | Voltage-controlled oscillator The problem of interference and coupling between circuits that arises in reducing the size of a voltage-controlled oscillator by using low temperature co-fired ceramics (LTCC) substrate technology is alleviated. A voltage-controlled oscillator includes an amplifier ... | 12/27/2005 |
| 6946931 | Surface acoustic wave resonator and surface acoustic wave filter A surface acoustic wave resonator includes a piezoelectric substrate, and a SAW resonator having an interdigital transducer. The interdigital transducer satisfies 0.15L≦W≦0.45L where W is the total of widths of all electrode fingers that form the interdigital tr... | 09/20/2005 |
| 6940208 | Surface acoustic wave device A surface acoustic wave device includes a ZnO dielectric thin film on a quartz substrate and an IDT electrode having strips between the ZnO thin film and the quartz substrate. The IDT electrode has at least one region where the strips are disposed at an interval def... | 09/06/2005 |
| 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 gases into the reactor and supplied onto the substrate, to form an Al... | 11/09/2004 |
| 6452464 | Backgate heterojunction acoustic charge transport device An acoustic charge transport device is formed by a process which introduces a process dependent variation in charge carrier density within the device. The acoustic charge transport device includes a transport channel operable to carry charge carriers in r... | 09/17/2002 |
| 6229409 | Surface acoustic wave matched filter An output side electrode of a surface acoustic wave matched filter with portions having different delay times between taps. The output side electrode may be provided by arranging parallelly a plurality of output side electrodes having different scales, di... | 05/08/2001 |
| 6049155 | Thermally tunable surface acoustic wave devices In accordance with the invention, the piezoelectric layer of a SAW device is mechanically coupled to a substrate of temperature-sensitive material having a large coefficient of thermal expansion or contraction. In a preferred embodiment, the temperature-s... | 04/11/2000 |
| 5432392 | Surface wave device Disclosed herein is a surface wave device utilizing Love waves, which comprises an LiNbO3 single-crystalline substrate (2), at least one interdigital transducer (5) formed thereon and a ZnO thin film (6) formed to cover the interdigital transdu... | 07/11/1995 |
| 5410742 | SAW electric part and frequency conversion circuit According to this invention, an SAW electric part includes an SAW filter and an SAW oscillator formed on a substrate having the same temperature characteristics as those of a substrate on which the SAW filter is formed. A frequency converter includes the ... | 04/25/1995 |
| 5294859 | Surface acoustic wave filter device A surface acoustic wave filter device includes a substrate which comprises quartz or the like piezoelectric having a small temperature coefficient and which is formed with unidirectional transducers of asymmetrical construction. A floating electrode is sp... | 03/15/1994 |
| 5084646 | Electric/acoustic transducers and acoustic/electric transducers for a surface wave device with reduced diffraction and a corresponding surface wave device The invention concerns electric/acoustic input transducers and acoustic/electric output transducers, in particular for a surface wave device, of the type comprising on a large face of a planar piezoelectric substrate: (i) two conductive input zones or out... | 01/28/1992 |
| 5068893 | Television signal processing network for subscription television jamming signals Networks which remove the jamming signal from the television signal supplied to subscribers for a premium T.V. channel in a cable (CATV) or other subscription television system utilizes surface accoustic wave (SAW) devices arranged to provide a broadband ... | 11/26/1991 |
| 4862110 | Oscillator, in particular a surface acoustic wave oscillator, frequency controlled by controlling its temperature An oscillator is provided, in particular a surface acoustic wave oscillator, frequency controlled by controlling its temperature, which oscillator comprises a SAW resonator frequency controlled by an integral loop including a heating means coupled thermal... | 08/29/1989 |
| 4752709 | Surface acoustic wave device A surface acoustic wave device comprising a surface acoustic wave substrate member composed by forming an aluminum oxide film and a thin zinc oxide film successively on a glass substrate. The thickness h1 of the aluminum oxide film and the thic... | 06/21/1988 |
| 4705979 | Stress and temperature compensated surface acoustic wave devices Disclosed is a rotated Y-cut, quartz SAW device having a propagation direction gamma and an angular orientation theta selected both for stress compensation and temperature compensation. In a particular embodiment gamma is 46.9° and theta is 41.8°.... | 11/10/1987 |
| 4661738 | Compensation techniques for temperature effects and non-uniform amplitude distributions in saw devices A SAW device using a first reflector (13) and a second reflector (14) is arranged to provide compensation for temperature effects. The temperature effects are due to the anisotropic characteristics of piezoelectric material commonly used as the substrate ... | 04/28/1987 |
| 4644297 | Frequency locked loop for the temperature compensation of phase coded surface acoustic wave devices A frequency locked loop having a surface acoustic wave time delay device disposed on the same substrate, or a substrate on the same material, as a surface acoustic wave device being compensated. As temperature causes changes in the surface acoustic wave d... | 02/17/1987 |
| 4639697 | Temperature compensation circuitry A surface acoustic wave (SAW) device provides a phase shift and a first predetermined phase shift variation as a function of temperature. A passive network including a passive, reactive component is thermally and electrically coupled to the SAW device. An... | 01/27/1987 |
| 4516049 | Multi-layer acoustic surface wave device having minimal delay time temperature coefficient An acoustic surface wave device includes a substrate made of an elastic material, a multilayer structure disposed on a surface of the substrate and having a silicon dioxide layer and an aluminum nitride layer superimposed on each other, and electrodes hav... | 05/07/1985 |
| 4511816 | Surface acoustic wave device using an elastic substrate and an aluminum nitride piezoelectric film A surface acoustic wave device comprises an elastic substrate having a major surface with a given crystal orientation and having a positive temperature coefficient of delay (TCD), and AlN film deposited on the elastic substrate so that piezoelectric axis ... | 04/16/1985 |
| 4491931 | Elastic wave processing system invariant with the temperature Signal processing by means of a system comprising an elastic wave device, invariant with the temperature. The input signal Se is written into a memory at the timing of a fixed clock hE and read at the timing of a clock HL suppl... | 01/01/1985 |
| 4489289 | Saw oscillator with digital compensation for temperature related frequency changes The inherent temperature instability of surface acoustic wave (SAW) clock oscillators is improved by the use of a thermometer oscillator circuit that senses temperature changes in the SAW substrate. The thermometer oscillator is used in combination with a... | 12/18/1984 |
| 4489250 | Temperature compensated surface acoustic wave device A surface acoustic wave device having a lithium tatraborate single crystal substrate is proposed. An electro-mechanical coupling coefficient K2 of the substrate is about 1% so as to obtain a surface acoustic wave having sufficient practical ene... | 12/18/1984 |
| 4484098 | Environmentally stable lithium niobate acoustic wave devices Acoustic Wave Devices comprise lithium niobate substrates 6, 22 having the principal plane cut at zero degrees and 128°, respectively, with respect to the Y crystallographic axis thereof, propagating in the X direction, with amorphous silicon dioxide sur... | 11/20/1984 |
| 4462011 | Low drift relative phase sensor employing surface acoustic waves Pairs of input transducers are formed on the surface of a piezoelectric crystalline body. The input transducers in each pair produce adjacent parallel surface acoustic waves of opposite polarity and specific phase difference which are sensed by a correspo... | 07/24/1984 |
