Coupling networks > Frequency domain filters utilizing only lumped parameters > Transformer coupled > With variable coupling means > Patents

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Class Information
Number: 333/180
Name: Wave transmission lines and networks > Coupling networks > Frequency domain filters utilizing only lumped parameters > Transformer coupled > With variable coupling means
Description: Subject matter wherein means are provided to adjust the degree of coupling between circuit elements or groupings of circuit elements.

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7511594	Noise filter and noise filter array	Mar. 31, 2009
5994985	Integrable high-Q tunable capacitor and method	Nov. 30, 1999
5594395	Diode tuned resonator filter	Jan. 14, 1997
5359315	Method of forming a three-layer structural spiral inductor	Oct. 25, 1994
5223806	Method and apparatus for reducing electromagnetic interference and emission associated with computer network interfaces	Jun. 29, 1993
4621245	Intermediate frequency filter for a DBS receiver	Nov. 4, 1986
4209757	Circuit for compensating harmonic currents in an electric consumer arrangement	Jun. 24, 1980
4123732	Method of making tuned resonance passive electronic filters	Oct. 31, 1978
4063201	Printed circuit with inductively coupled printed coil elements and a printed element forming a mutual inductance therewith	Dec. 13, 1977