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Class 333/194 - Including spurious signal prevention or reduction means


Subclass of Class 333 - Wave transmission lines and networks
Definition: Subject matter including structure for minimizing undesired
No. of patents: 337
Last issue date: 11/02/2010


1                  
NumberTitleIssue Date
7825750EMI filter for controlling cutoff frequency
Disclosed relates to an electromagnetic interference (EMI) filter. Capacitance and resistance or inductance of an EMI filter, which includes a resistor and a capacitor or an inductor and a capacitor, can be controlled, such that a cutoff frequency can be freely cont...
11/02/2010
7501916Elastic wave device having an electrode finger with a side edge projection
An elastic wave device includes at least one IDT electrode provided on a piezoelectric substrate. The at least one IDT electrode includes first and second electrode fingers arranged next to each other in a propagation direction of elastic wave. The side edges of at ...
03/10/2009
7436273Surface 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
7411291Component 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
7372347Surface acoustic wave device
A surface acoustic wave (SAW) device includes a piezoelectric substrate, a first and a second interdigital transducers (IDT) provided thereon. The second IDT has a side that is substantially aligned with a corresponding side of the first IDT, and another side of the...
05/13/2008
7372897Portable 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
7369016Balanced saw filter
In a balanced SAW filter, a second IDT and a fourth IDT of a five IDT type first longitudinally-coupled-resonator SAW filter element are connected via first and second wiring lines to a seventh IDT and a ninth IDT of a five IDT type second longitudinally-coupled-res...
05/06/2008
7369015Balanced surface acoustic wave filter
A surface acoustic wave filter includes first to fifth IDTs arranged on a piezoelectric substrate along a surface acoustic wave propagation direction. The second IDT and the fourth IDT have a phase difference of 180° with respect to each other. The second and fourt...
05/06/2008
7362033Surface-acoustic-wave device
A surface-acoustic-wave device includes a piezoelectric substrate and first and second comb-shaped electrodes each having a bus-bar portion parallel to a propagation direction of a surface acoustic wave in the substrate. Respective electrode fingers are periodically...
04/22/2008
7352800Method 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
7330089Balanced acoustic wave filter device
In a balanced acoustic wave filter device, first and second acoustic wave filter sections that are connected in parallel to an unbalanced terminal are connected to first and second balanced terminals, respectively. The first and second surface acoustic wave filter s...
02/12/2008
7323802Surface acoustic wave device
A surface acoustic wave device that can operate in alternate-phase mode and single-phase mode, and thus generate surface acoustic waves at two different frequencies. The device is based on a piezoelectric film deposited on an elastic substrate, and includes an elect...
01/29/2008
7321735Optical down-converter using universal frequency translation technology
A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w...
01/22/2008
7301423Surface acoustic wave element and manufacturing method thereof
A surface acoustic wave (SAW) element including a semiconductor substrate on which a semiconductor wiring region and a SAW region are formed alongside in a same plane, a metal wiring formed in the semiconductor wiring region, an insulating layer including the metal ...
11/27/2007
7295826Integrated frequency translation and selectivity with gain control functionality, and applications thereof
Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering...
11/13/2007
7292835Wireless and wired cable modem applications of universal frequency translation technology
Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and fil...
11/06/2007
7280008Printed-circuit board, electronic part having shield structure, and radio communication apparatus
In a fitting region for a SAW filter which includes langasite as its piezoelectric element, there are included an input side terminal electrode and an output side terminal electrode which are connected to an input terminal and to an output terminal of the SAW filter...
10/09/2007
7253702High-frequency switch module
A high-frequency switch module, including a laminate constituted of dielectric layers having electrode patterns, the high-frequency switch module also including a high-frequency switch circuit for switching a transmitting circuit and a receiving circuit of transmitt...
08/07/2007
7250887System and method for spur cancellation
A system for spur cancellation comprises an input, an output, a memory, and a summer. A value corresponding to an energy level of a spur is stored in the memory. The summer is configured to receive an input signal from the input, to receive the value from the memory...
07/31/2007
7245193Surface acoustic wave element and electronic equipment provided with the element
A surface acoustic wave element 1 includes a substrate 2, an intermediate layer and a piezoelectric layer 4 laminated on the substrate 2, an IDT 5 disposed on the piezoelectric layer 4, a pair of reflectors 6 and 7...
07/17/2007
7218188Microelectromechanical apparatus and methods for surface acoustic wave switching
Microelectromechanical system (MEMS) apparatus and methods for surface acoustic wave (SAW) switching are disclosed. The apparatus includes a piezoelectric substrate having spaced apart input and output SAW transducers. A MEMS switch is arranged between the input and...
05/15/2007
7190241Elastic wave apparatus
A surface acoustic wave apparatus is configured to avoid destruction from static electricity. The surface acoustic wave apparatus includes a piezoelectric substrate; a surface acoustic wave element having at least one interdigital electrode made up of a conductive f...
03/13/2007
7183892Chip PTC thermistor and method for manufacturing the same
Chip PTC thermistors that can easily be inspected the soldered portions after it is mounted on a printed circuit board and that can be used in a flow soldering process, and methods of making same. A chip PTC thermistor of the present invention includes: a first main...
02/27/2007
7183878Surface acoustic wave filter
A surface acoustic wave filter having a plurality of the transmission lines, each with one end connected to the surface acoustic wave element and the other end thereof connected to a ground. The transmission lines are divided by an additional transmission line which...
02/27/2007
7180388Surface acoustic wave device
The present invention provides a surface acoustic wave device that allows a plurality of surface acoustic wave filters to be formed on a single chip and permits greater miniaturization. The surface acoustic wave device comprises a piezoelectric substrate, a first su...
02/20/2007
7173360Single phase undirectional surface acoustic wave transducer and improved reflectors
A unidirectional transducer for a surface acoustic wave (SAW) device. In one embodiment the device includes (1) a defined area on a piezoelectric substrate within which is located an open circuit reflector perpendicular to the SAW direction of propagation; and a pai...
02/06/2007
7170372Converter for surface waves with improved suppression of interfering excitation
An electro-acoustic transducer for a component operating with surface waves, in particular for a surface wave filter, in which, to suppress interfering excitation ensuing in the gap region adjacent an end of a finger, a variation of the gaps is implemented with rega...
01/30/2007
7158763Multi-IDT SAW hybrid communication system
A SAW communication device has a main IDT mounted on an SAW substrate to receive an RF signal received by an antenna and convert the RF signal to an acoustic wave which travels along the SAW substrate in opposite directions from the main IDT. At least two secondary ...
01/02/2007
7154360Filter using piezoelectric material
A filter includes a piezoelectric substrate, and interdigital transducers (IDTs) that are formed on the piezoelectric substrate. At least one of the IDTs has a main electrode finger pattern that is weighted. The IDT having the main electrode finger pattern also has ...
12/26/2006
7148769Surface acoustic wave device and process for fabricating the same
A surface acoustic wave device has a piezoelectric substrate 1, and a comb transducer 2 formed on a surface of the piezoelectric substrate 1. Grooves 5 for eliminating an unnecessary wave are formed in a back surface of the surface acoust...
12/12/2006
7132778Surface acoustic wave modulator
An acoustic wave identification transponder device, having a substrate, an electroacoustic transfer generating an acoustic wave in said substrate and a set of encoding elements disposed in a path of the acoustic wave for modifying the acoustic wave, having elements ...
11/07/2006
7126251Interface acoustic wave device made of lithium tantalate
The invention relates to interfaces acoutics wave components made of lithium tantalate. Two substrate make up the filter have the same cut and the same crystal orientation, the invention gives the best cut angles in particular for optimizing the electromechanical co...
10/24/2006
7126441Electronic component having a connection member connecting a resonator terminal and a mounting substrate electrode
An electronic component according to an embodiment of the present invention comprises a resonator, a mounting substrate, and an electric connection member. The resonator has a terminal. The mounting substrate has a first principal surface, a second principal surface...
10/24/2006
7110435Spread spectrum applications of universal frequency translation
Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion an...
09/19/2006
7110444Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen...
09/19/2006
7106150Surface acoustic wave filter
A surface acoustic wave filter with little electromagnetic coupling between wires and improved attenuation characteristics is provided. This surface acoustic wave filter comprises: a package having a concavity in the shape of stairs made by laminating dielectrics, a...
09/12/2006
7102269Surface acoustic wave device
A surface acoustic wave device includes first and second surface acoustic wave resonator filters connected in parallel to each other. The first double-mode surface acoustic wave resonator filter has resonance frequencies f1L and f1H and the second doub...
09/05/2006
7082171Phase shifting applications of universal frequency translation
A universal frequency translation module (UFT) frequency translates an electromagnetic (EM) input signal by sampling the EM input signal according to a periodic control signal (also called an aliasing signal). By controlling the relative sampling time, the UFT modul...
07/25/2006
7072390Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments
Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen...
07/04/2006
7067956Surface acoustic wave device, filter device and method of producing the surface acoustic wave device
A surface acoustic wave device includes a piezoelectric substrate on which resonators having comb-like electrodes are formed; and a silicon substrate that is directly bonded to the piezoelectric substrate and is less expansive than the piezoelectric substrate, a cav...
06/27/2006
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