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Class Information
Number: 333/167
Name: Wave transmission lines and networks > Coupling networks > Frequency domain filters utilizing only lumped parameters
Description: Subject matter having only parameters which may be considered as concentrated at one point and permitting free transmission of electric waves of a single frequency or band of frequencies (which may include zero frequency) while attenuating substantially electric waves having other frequencies, or attenuating substantially electric waves of a single frequency or band of frequencies (which may include zero frequency) while permitting free transmission of electric waves having other frequencies, 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 |
| 7555278 |
Unconditionally stable filter |
Jun. 30, 2009 |
| 7511596 |
Dual bandpass filter having serial configuration of coupled-line filters |
Mar. 31, 2009 |
| 7446631 |
Radio frequency inductive-capacitive filter circuit topology |
Nov. 4, 2008 |
| 7424276 |
Transmitter and wireless communication apparatus using the transmitter |
Sep. 9, 2008 |
| 7308241 |
Receiver system |
Dec. 11, 2007 |
| 7292449 |
Virtual ground return for reduction of radiated emissions |
Nov. 6, 2007 |
| 7259643 |
Tunable wideband bandpass filter, tunable multi-band bandpass filter using the same, and methods therefore |
Aug. 21, 2007 |
| 7259639 |
Inductor topologies and decoupling structures for filters used in broadband applications, and design methodology thereof |
Aug. 21, 2007 |
| 7203474 |
Receiver system |
Apr. 10, 2007 |
| 7197284 |
Antenna switches including field effect transistors |
Mar. 27, 2007 |
| 7177612 |
Frequency generator and communication system using the same |
Feb. 13, 2007 |
| 7126443 |
Increasing performance of planar inductors used in broadband applications |
Oct. 24, 2006 |
| 7084720 |
Printed bandpass filter for a double conversion tuner |
Aug. 1, 2006 |
| 7079644 |
Input-output balanced filter |
Jul. 18, 2006 |
| 7002434 |
Lumped-element transmission line in multi-layered substrate |
Feb. 21, 2006 |
| 6954119 |
Cascaded arrangement of lower order filters and method of designing the same |
Oct. 11, 2005 |
| 6944435 |
Unconditionally stable on-chip filter and applications thereof |
Sep. 13, 2005 |
| 6914477 |
Bandpass filter unit and communication apparatus |
Jul. 5, 2005 |
| 6903628 |
Lowpass filter formed in multi-layer ceramic |
Jun. 7, 2005 |
| 6894585 |
High quality factor (Q) planar spiral inductor based CATV diplexer and telephony module |
May. 17, 2005 |
| 6861926 |
.pi.-Type band pass filter |
Mar. 1, 2005 |
| 6809613 |
Low-reflection transmission-line filters with gaussian characteristics |
Oct. 26, 2004 |
| 6791436 |
Modular electrical signal filter assembly |
Sep. 14, 2004 |
| 6737935 |
Diplex circuit forming bandstop filter |
May. 18, 2004 |
| 6734759 |
Droop compensation filter having high pass characteristic |
May. 11, 2004 |
| 6696885 |
Polyphase filters in silicon integrated circuit technology |
Feb. 24, 2004 |
| 6686814 |
Voltage tunable varactors and tunable devices including such varactors |
Feb. 3, 2004 |
| 6683508 |
System and method of increasing a self-resonant frequency of a tuning circuit and an oscillator employing the same |
Jan. 27, 2004 |
| 6633208 |
Filter with improved intermodulation distortion characteristics and methods of making the improved filter |
Oct. 14, 2003 |
| 6617941 |
Method for designing a filter system |
Sep. 9, 2003 |
| 6599855 |
Nonreducing dielectric ceramic and ceramic electronic component using same |
Jul. 29, 2003 |
| 6593816 |
Balanced input/output filter circuit and device |
Jul. 15, 2003 |
| 6587019 |
Dual directional harmonics dissipation system |
Jul. 1, 2003 |
| 6535058 |
Multi-reference, high-accuracy switching amplifier |
Mar. 18, 2003 |
| 6490143 |
Blocking circuit for high voltage spike testing |
Dec. 3, 2002 |
| 6476957 |
Image rejecting microwave photonic downconverter |
Nov. 5, 2002 |
| 6448872 |
Reflection-mode filter and method with a constant loss off-set |
Sep. 10, 2002 |
| 6429754 |
Electrical signal filter with improved isolation shield |
Aug. 6, 2002 |
| 6317013 |
Delay line filter |
Nov. 13, 2001 |
| 6317016 |
Method and arrangement for gyration filtering with low power consumption |
Nov. 13, 2001 |
| 6281767 |
Reconstruction filter for eliminating the switching residue in a switched system |
Aug. 28, 2001 |
| 6236285 |
Lumped element circulator having a plurality of separated operation bands |
May. 22, 2001 |
| 6229408 |
Zero loss bias "T" |
May. 8, 2001 |
| 6211754 |
Integrated resonance circuit consisting of a parallel connection of a microstrip line and a capacitor |
Apr. 3, 2001 |
| 6208225 |
Filter structures for integrated circuit interfaces |
Mar. 27, 2001 |
| 6198345 |
Error reduction in quadrature polyphase filters with low open loop gain operational amplifiers |
Mar. 6, 2001 |
| 6188750 |
Impedance blocking filter circuit |
Feb. 13, 2001 |
| 6147658 |
Array antenna device and radio equipment |
Nov. 14, 2000 |
| 6107896 |
Linear attenuation equalizer and method for designing same |
Aug. 22, 2000 |
| 6101371 |
Article comprising an inductor |
Aug. 8, 2000 |
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