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Class Information
Number: 333/188
Name: Wave transmission lines and networks > Coupling networks > Electromechanical filter > Using bulk mode piezoelectric vibrator > With means for varying response
Description: Subject matter wherein the filter bandwidth, center frequency, or phasing may be adjusted by mechanically or electrically variable parameters.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7629865 |
Piezoelectric resonator structures and electrical filters |
Dec. 8, 2009 |
| 7616078 |
Device for controlling the frequency of resonance of an oscillating micro-electromechanical system |
Nov. 10, 2009 |
| 7586391 |
Switchable filter with resonators |
Sep. 8, 2009 |
| 7579662 |
MEMS resonator and method of enhancing an output signal current from a MEMS resonator |
Aug. 25, 2009 |
| 7554426 |
Resonator, apparatus having the same and fabrication method of resonator |
Jun. 30, 2009 |
| 7551044 |
Electric machine signal selecting element |
Jun. 23, 2009 |
| 7548142 |
Tuneable resonator |
Jun. 16, 2009 |
| 7522019 |
Internal electrostatic transduction structures for bulk-mode micromechanical resonators |
Apr. 21, 2009 |
| 7492242 |
Integrable tunable filter circuit comprising a set of BAW resonators |
Feb. 17, 2009 |
| 7486003 |
Polymer bulk acoustic resonator |
Feb. 3, 2009 |
| 7459990 |
Arrangement with two piezoelectric layers, and method of operating a filter device |
Dec. 2, 2008 |
| 7459993 |
Resonator, band-pass filter, and duplexer |
Dec. 2, 2008 |
| 7432785 |
Thin film resonator, method for making thin film resonator and filter having thin film resonators |
Oct. 7, 2008 |
| 7427905 |
Temperature controlled MEMS resonator and method for controlling resonator frequency |
Sep. 23, 2008 |
| 7423502 |
Electronic circuit comprising a resonator to be integrated into a semiconductor product |
Sep. 9, 2008 |
| 7397326 |
Electromechanical filter |
Jul. 8, 2008 |
| 7372346 |
Acoustic resonator |
May. 13, 2008 |
| 7348867 |
Filter and composite filter, filter assembly, integrated circuit chip and electronic device which contain same, and frequency characteristic changing method therefor |
Mar. 25, 2008 |
| 7319371 |
Resonator filter structure having equal resonance frequencies |
Jan. 15, 2008 |
| 7310029 |
Bulk acoustic resonator with matched resonance frequency and fabrication process |
Dec. 18, 2007 |
| 7307496 |
Method and apparatus for frequency tuning of a micro-mechanical resonator |
Dec. 11, 2007 |
| 7280007 |
Thin film bulk acoustic resonator with a mass loaded perimeter |
Oct. 9, 2007 |
| 7274274 |
Integrable acoustic resonator and method for integrating such resonator |
Sep. 25, 2007 |
| 7268646 |
Temperature controlled MEMS resonator and method for controlling resonator frequency |
Sep. 11, 2007 |
| 7221241 |
Method for adjusting the frequency of a MEMS resonator |
May. 22, 2007 |
| 7176770 |
Capacitive vertical silicon bulk acoustic resonator |
Feb. 13, 2007 |
| 7170369 |
Method for frequency tuning of a micro-mechanical resonator |
Jan. 30, 2007 |
| 7102467 |
Method for adjusting the frequency of a MEMS resonator |
Sep. 5, 2006 |
| 7068126 |
Method and apparatus for frequency tuning of a micro-mechanical resonator |
Jun. 27, 2006 |
| 7030718 |
Apparatus and method for extending tuning range of electro-acoustic film resonators |
Apr. 18, 2006 |
| 6988300 |
Method of producing a piezoelectric element |
Jan. 24, 2006 |
| 6975184 |
Adjusting the frequency of film bulk acoustic resonators |
Dec. 13, 2005 |
| 6943648 |
Methods for forming a frequency bulk acoustic resonator with uniform frequency utilizing multiple trimming layers and structures formed thereby |
Sep. 13, 2005 |
| 6922118 |
Micro electrical mechanical system (MEMS) tuning using focused ion beams |
Jul. 26, 2005 |
| 6911708 |
Duplexer filter having film bulk acoustic resonator and semiconductor package thereof |
Jun. 28, 2005 |
| 6870446 |
High frequency filter |
Mar. 22, 2005 |
| 6859116 |
Piezoelectric resonator |
Feb. 22, 2005 |
| 6847271 |
Component having an acoustically active material for tuning during operation |
Jan. 25, 2005 |
| 6774729 |
Composite-material vibrating device |
Aug. 10, 2004 |
| 6774746 |
Thin film bulk acoustic resonator filters with a piezoelectric layer of lead scandium tantalum oxide |
Aug. 10, 2004 |
| 6756863 |
High-frequency oscillator of frequency switching type and high-frequency oscillation method |
Jun. 29, 2004 |
| 6747529 |
Piezoelectric thin film resonator and frequency variable resonator using the resonator |
Jun. 8, 2004 |
| 6741147 |
Method and apparatus for adjusting the resonant frequency of a thin film resonator |
May. 25, 2004 |
| 6734763 |
Thin-film piezoelectric resonator, band-pass filter and method of making thin-film piezoelectric resonator |
May. 11, 2004 |
| 6707351 |
Tunable MEMS resonator and method for tuning |
Mar. 16, 2004 |
| 6653913 |
Tunable piezoelectric filter arrangement using a dielectric material with a voltage-dependent dielectric constant |
Nov. 25, 2003 |
| 6650204 |
Resonator frequency correction by modifying support structures |
Nov. 18, 2003 |
| 6583688 |
Tunable filter arrangement comprising resonators with reflection layers |
Jun. 24, 2003 |
| 6570468 |
Resonator frequency correction by modifying support structures |
May. 27, 2003 |
| 6566979 |
Method of providing differential frequency adjusts in a thin film bulk acoustic resonator (FBAR) filter and apparatus embodying the method |
May. 20, 2003 |
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