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Class Information
Number: 333/32
Name: Wave transmission lines and networks > Coupling networks > With impedance matching
Description: Coupling networks which include one or more impedance elements constructed or proportioned to substantially eliminate the reflected wave energy between the network and at least one of the connected circuits caused by impedance differences; impedance matching networks, per se; and systems within the class definition which include such networks.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7623003 |
Drive method for driving element having capacity impedance, drive device, and imaging device |
Nov. 24, 2009 |
| 7595546 |
Printed circuit board |
Sep. 29, 2009 |
| 7596699 |
Battery authentication system |
Sep. 29, 2009 |
| 7594105 |
Multilayer print circuit board |
Sep. 22, 2009 |
| 7586389 |
Impedance transformation and filter using bulk acoustic wave technology |
Sep. 8, 2009 |
| 7586384 |
Integrated load impedance sensing for tunable matching networks |
Sep. 8, 2009 |
| 7579924 |
Dual-frequency matching circuit |
Aug. 25, 2009 |
| 7573349 |
Antenna balun |
Aug. 11, 2009 |
| 7573350 |
Resonator matching network |
Aug. 11, 2009 |
| 7573351 |
Dual-frequency matching circuit |
Aug. 11, 2009 |
| 7573352 |
Dual-frequency matching circuit |
Aug. 11, 2009 |
| 7570131 |
Dual-frequency matching circuit |
Aug. 4, 2009 |
| 7570130 |
Apparatus and methods for a fixed impedance transformation network for use in connection with a plasma chamber |
Aug. 4, 2009 |
| 7567144 |
Dual-frequency matching circuit |
Jul. 28, 2009 |
| 7564321 |
Dual-frequency matching circuit |
Jul. 21, 2009 |
| 7564322 |
Dual-frequency matching circuit |
Jul. 21, 2009 |
| 7564695 |
Circuit connection structure and printed circuit board |
Jul. 21, 2009 |
| 7554417 |
Circuit and method for adjusting impedance |
Jun. 30, 2009 |
| 7554334 |
Matching network characterization using variable impedance analysis |
Jun. 30, 2009 |
| 7535312 |
Adaptive impedance matching apparatus, system and method with improved dynamic range |
May. 19, 2009 |
| 7528674 |
Mobile radio apparatus capable of adaptive impedance matching |
May. 5, 2009 |
| 7518466 |
Methods and apparatus for symmetrical and/or concentric radio frequency matching networks |
Apr. 14, 2009 |
| 7515014 |
Method for determining cable termination resistances in communication networks and a corresponding communication network |
Apr. 7, 2009 |
| 7515016 |
Reconfiguring impedance matching for high power circuits |
Apr. 7, 2009 |
| 7501914 |
Bias circuit |
Mar. 10, 2009 |
| 7479844 |
Method to improve characteristics of PIN diode switches, attenuators, and limiters by control of nodal signal voltage amplitude |
Jan. 20, 2009 |
| 7461188 |
Capacitive multidrop bus compensation |
Dec. 2, 2008 |
| 7453328 |
Bandwidth high-power T network tuner |
Nov. 18, 2008 |
| 7453393 |
Coupler with waveguide transition for an antenna in a radar-based level measurement system |
Nov. 18, 2008 |
| 7443264 |
Compact impedance transformation circuit |
Oct. 28, 2008 |
| 7411471 |
High-frequency switch |
Aug. 12, 2008 |
| 7400164 |
Integrated circuit and method of improving signal integrity |
Jul. 15, 2008 |
| 7395028 |
Switching apparatus and satellite antenna switching apparatus |
Jul. 1, 2008 |
| 7391281 |
Method for suppressing resonant effect between capacitors connected in parallel |
Jun. 24, 2008 |
| 7391285 |
Film acoustically-coupled transformer |
Jun. 24, 2008 |
| 7388455 |
Film acoustically-coupled transformer with increased common mode rejection |
Jun. 17, 2008 |
| 7385459 |
Broadband DC block impedance matching network |
Jun. 10, 2008 |
| 7385465 |
Switchable dual-band filter |
Jun. 10, 2008 |
| 7378920 |
Methods and apparatus for a high-frequency output match circuit |
May. 27, 2008 |
| 7376407 |
System and method for dynamic impedance tuning to minimize return loss |
May. 20, 2008 |
| 7369019 |
RF backscatter transmission with zero DC power consumption |
May. 6, 2008 |
| 7369834 |
Impedance-matched IQ network for an image rejection circuit |
May. 6, 2008 |
| 7351905 |
Apparatus for powering an electronic musical instrument |
Apr. 1, 2008 |
| 7345555 |
Writing pattern structure of differential transmission paths |
Mar. 18, 2008 |
| 7339444 |
Methods for providing bias to a monolithic microwave integrated circuit |
Mar. 4, 2008 |
| 7332981 |
Impedance matching apparatus for a plasma chamber comprising two separate storage units and three separate calculators |
Feb. 19, 2008 |
| 7332980 |
System and method for a digitally tunable impedance matching network |
Feb. 19, 2008 |
| 7294791 |
Circuitized substrate with improved impedance control circuitry, method of making same, electrical assembly and information handling system utilizing same |
Nov. 13, 2007 |
| 7288723 |
Circuit board including isolated signal transmission channels |
Oct. 30, 2007 |
| 7286026 |
Serial signal injection using capacitive and transformer couplings for power line communications |
Oct. 23, 2007 |
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