Did You Know...
...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...
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| Number | Title | Issue Date |
| 8138858 | Architectures using multiple dual-mode surface acoustic wave devices The present invention relates to dual-mode SAW devices (DMSDs), which may allow for clean layouts of SAW device elements and provide low impedance with reduced insertion loss, and may increase broadband rejection by improving parasitic characteristics. In one embodi... | 03/20/2012 |
| 8134426 | Two-track surface acoustic wave structure without internal pads The present disclosure relates to a two-track surface acoustic wave (SAW) device that has a reduced size compared to a traditional two-track SAW device by eliminating an internal ground connection node of the traditional two-track SAW device. The internal ground con... | 03/13/2012 |
| 8106726 | Elastic surface wave device comprising dummy electrodes A surface acoustic wave device includes a pair of reflectors and an interdigital transducer having a cross electrode having a interdigitated portion and a dummy portion and a dummy electrode. The dummy electrode has a length different from the length of the dummy po... | 01/31/2012 |
| 8102225 | Acoustic wave filter device An acoustic wave filter device having a greatly reduced size includes a balance-unbalance conversion function and an input/output impedance ratio of about 1. The acoustic wave filter device includes a second IDT of a first acoustic wave filter portion that is connec... | 01/24/2012 |
| 8068001 | Saw filter featuring impedance transformation A surface acoustic wave (SAW) filter includes at least one first electroacoustic transducer, and at least one second electroacoustic transducer. The at least one first electroacoustic transducer and the at least one second electroacoustic transducer are side-by-side... | 11/29/2011 |
| 8049583 | Acoustic wave filter comprising a reflector having an oblique slit An acoustic wave filter includes a piezoelectric substrate, an IDT (interdigital transducer) formed on the piezoelectric substrate, and reflectors located at both sides of the IDT and composed of electrode fingers, at least one of the electrode fingers of at least o... | 11/01/2011 |
| 7994878 | Acoustic wave device and high-frequency filter using the same Boundary acoustic wave devices are both compact and possess excellent temperature stability. Yet these devices have the drawback that the Q value cannot be raised, and a high cost thin-film technology is required. This invention provides a boundary acoustic wave dev... | 08/09/2011 |
| 7990234 | Elastic wave filter The object of the present invention is to provide an elastic wave filter capable of suppressing deterioration of a pass band and realizing to downsize. In the elastic wave filter of the present invention provided with a circuit, to which elastic wave resonators of a... | 08/02/2011 |
| 7940147 | Balanced acoustic wave filter device and composite filter In an acoustic wave filter device, first and second acoustic wave filter elements are connected in parallel to an unbalance terminal. Of first to third IDTs, the second and third IDTs are connected to a first balance terminal. Of fourth to sixth IDTs, the fifth and ... | 05/10/2011 |
| 7915976 | Surface acoustic wave resonator and ladder-type filter A surface acoustic wave resonator is constructed such that cross widths of an IDT electrode are weighted so that the cross widths are reduced as they move outward in the surface acoustic wave propagation direction, an inner edge of a first bus bar includes inclined ... | 03/29/2011 |
| 7898366 | Balanced acoustic wave filter device and composite filter An acoustic wave filter device which attains improved balancing between transmission characteristics of first and second balanced terminals includes first and second 3-IDT longitudinally coupled resonator type acoustic wave filter elements that are connected to an u... | 03/01/2011 |
| 7786827 | Surface acoustic wave device, transmitter, and transceiver A surface acoustic wave device comprises a surface acoustic wave element, including: a piezoelectric substrate, a first interdigital transducer unit having a first interdigital transducer and a second interdigital transducer formed on the piezoelectric substrate, an... | 08/31/2010 |
| 7764144 | Elastic wave filter with tapered IDT electrodes In an elastic wave filter in which an IDT is configured in a tapered shape, an object of the present invention is to provide a technology capable of suppressing deterioration of attenuation characteristics due to refraction and the like of the elastic wave and also ... | 07/27/2010 |
| 7728698 | Surface acoustic wave resonator filter with longitudinally coupled transducers A surface acoustic wave filter includes an acoustic track bounded by reflectors, at least a first input transducer and at least a second input transducer acoustically coupled to the acoustic track that are connected in parallel and connected to an asymmetric input p... | 06/01/2010 |
| 7692517 | Oscillator with acoustic surface wave resonators An oscillator or a sensor comprising a unit including two frequency determining elements each of which comprises at least one interdigital converter for acoustic surface waves and a back-coupling circuit comprising an amplifier, wherein the frequency determining ele... | 04/06/2010 |
| 7679474 | Surface acoustic wave resonator, and surface acoustic wave filter A surface acoustic wave resonator has a piezoelectric substrate (11), an IDT (13) formed of a plurality of electrode fingers (12) disposed on piezoelectric substrate (11), and reflectors (14) disposed near the opposite ends of IDT ... | 03/16/2010 |
| 7646266 | Surface acoustic wave resonator and surface acoustic wave filter using the same A Q-factor of a resonator at a high frequency is improved. An insertion loss of a filter using such a resonator and steepness of the filter are improved. A plurality of surface acoustic wave resonators including an interdigital transducer and reflecting electrodes p... | 01/12/2010 |
| 7626475 | Saw filter device A SAW filter device includes a SAW filter chip in which one-port surface acoustic wave resonators each including an IDT made of Al or an Al alloy, are provided on a θ-rotated Y-cut X-propagation LiNbO3 substrate. The cutting angle θ of the θ-rotated Y-... | 12/01/2009 |
| 7579932 | Resonator SAW filter having a control interdigital transducer between input and output interdigital transducers A longitudinally coupled multi-mode SAW resonator filter includes input and output interdigital transducers (IDTs) with a control IDT therebetween to control a state of the surface acoustic wave. The input, output, and control IDTs alternatively arrange two differen... | 08/25/2009 |
| 7528685 | Lamb wave type high frequency device A lamb wave type high frequency device includes: an interdigital transducer (IDT) electrode having an electrode finger interdigitated therein; a pair of reflectors having an electrode finger and being disposed at both sides of a propagation direction of a lamb wave ... | 05/05/2009 |
| 7518471 | Surface acoustic wave filter utilizing a floating electrode A surface acoustic wave filter (cascaded dual mode SAW filter) includes three IDT electrodes disposed adjacent to each other along the propagation direction of a surface wave on a piezoelectric substrate and two primary-tertiary longitudinally-coupled dual mode SAW ... | 04/14/2009 |
| 7504911 | Surface acoustic wave resonator, surface acoustic wave device, and communications equipment A plurality of IDT electrodes 2 to 7 each having a large number of electrode fingers extending in a direction perpendicular to a propagation direction of a surface acoustic wave propagating on a piezoelectric substrate 1 are arranged on the piez... | 03/17/2009 |
| 7501917 | Surface acoustic wave filter A SAW filter is configured by forming a first IDT and a second IDT on a piezoelectric substrate, and the first IDT is arranged between one terminal of input/output terminals and another terminal of the input/output terminals, i.e., serially in a signal path, and the... | 03/10/2009 |
| 7482895 | Surface acoustic wave filter A saw filter of the invention has a piezoelectric substrate (11), plural numbers of IDT electrodes (12,13) arranged on a surface of the piezoelectric substrate (11) as well as on a first surface acoustic wave propagation path, reflector electrod... | 01/27/2009 |
| 7479853 | Balanced type surface acoustic wave filter In a balanced type surface acoustic wave filter, a first longitudinally coupled resonator-type surface acoustic wave filter portion connected to an unbalanced input terminal and a second longitudinally coupled resonator-type surface acoustic wave filter portion conn... | 01/20/2009 |
| 7479854 | Balanced-type surface acoustic wave filter In a balanced-type surface acoustic wave filter, a first longitudinally coupled resonator surface acoustic wave filter unit connected to an unbalanced signal terminal is connected in a cascade arrangement to a second longitudinally coupled resonator surface acoustic... | 01/20/2009 |
| 7459997 | Elastic wave filter device and duplexer In an elastic wave acoustic device, input ends of first to third longitudinally coupled resonator surface acoustic wave filters are connected to an unbalanced signal terminal, the output end of the first longitudinally coupled resonator surface acoustic wave filter,... | 12/02/2008 |
| 7456710 | Saw resonator A surface acoustic wave (SAW) resonator, including: a first interdigital transducer composed of a pair of interdigital electrodes provided in a propagation direction of a surface acoustic wave; a second interdigital transducer composed of a pair of interdigital elec... | 11/25/2008 |
| 7453334 | Leaky SAW resonator and method A SAW ladder filter includes grating pads extending from opposing bus bars and interdigital transducer electrodes extending from the grating pads for defining an acoustic aperture. The metalization ratio for the grating pads is greater than that for the interdigital... | 11/18/2008 |
| 7453333 | Surface acoustic wave apparatus and communications equipment A surface acoustic wave apparatus comprises a piezoelectric substrate 17 on the bottom face of which IDT electrodes 3 and 4 and an annular ground electrode 6 which encloses the IDT electrodes 3 and 4 and is connected to the ... | 11/18/2008 |
| 7453335 | Surface acoustic wave resonator, surface acoustic wave filter and surface acoustic wave duplexer, and communications equipment Disclosed is a surface acoustic wave resonator which comprises, on a piezoelectric substrate 19, an IDT electrode 1 including bus bar electrodes 12a, reflector electrodes 2 disposed to be adjacent to both sides of the IDT electrode... | 11/18/2008 |
| 7439827 | Surface acoustic wave filter device A longitudinally-coupled-resonator surface acoustic wave filter device has a sufficient pass-band width, in which a large attenuation in a stop band near the low-frequency side of a pass band and sharp filter characteristics, and low insertion loss in the pass band ... | 10/21/2008 |
| 7436273 | Surface acoustic wave device and method for manufacturing the same A SAW chip (11) where ones are balanced signal terminals and the others are unbalanced signal terminals is mounted on a mounting board (12) in a flip chip manner, and the mounting board (12) and a surface of the SAW chip are covered with resin (... | 10/14/2008 |
| 7429905 | Balanced acoustic wave filter An acoustic wave filter device includes a piezoelectric substrate and a longitudinally coupled resonator surface acoustic wave filter unit provided on the piezoelectric substrate. The surface acoustic wave filter unit includes first to fifth IDTs arranged in a surfa... | 09/30/2008 |
| 7425879 | Surface acoustic wave filter apparatus and branching filter In a longitudinally coupled resonator SAW filter apparatus, one end of each N first longitudinally coupled resonator SAW filter, where N is an integer equal to or greater than 2, is connected in parallel to an unbalanced signal terminal, the first N longitudinally c... | 09/16/2008 |
| 7425882 | Balanced-type surface acoustic wave filter In a balanced-type surface acoustic wave filter, IDTs in the center of each of first and second longitudinally coupled resonator type surface acoustic wave filter sections are connected to an unbalanced input terminal, first and third IDT sections on both the sides ... | 09/16/2008 |
| 7425788 | Surface acoustic wave device In a surface acoustic wave device, a plurality of grooves are provided on a piezoelectric substrate, an electrode film defining an IDT electrode is formed by filling an electrode material in the grooves, an insulator layer, such as a SiO2 film, is arrange... | 09/16/2008 |
| 7425878 | Surface acoustic wave filter and duplexer using the same A multimode type SAW filter includes a piezoelectric substrate, and IDT groups formed on the piezoelectric substrate, the IDT groups each having multiple IDTs connected in series in which an input/output electrode and a ground electrode are coupled via a floating co... | 09/16/2008 |
| 7414494 | Surface acoustic wave apparatus A surface acoustic wave apparatus includes an input terminal, an output terminal, a plurality of acoustically coupled interdigital transducers (IDT), and a phase rotating element (line or inductor) connected in parallel with one or more IDT's. The acoustically coupl... | 08/19/2008 |
| 7411291 | Component with sensitive component structures and method for the production thereof An electrical component has electrically conducting structures placed on an electrically isolating or semiconductive substrate and component structures sensitive to a voltage or an electrical arcing and galvanically separated from one another. To prevent an arcing b... | 08/12/2008 |
