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Class Information
Number: 330/167
Name: Amplifiers > Interstage coupling > Transformer coupling > With additional impedance connected to "p" or "s" circuits
Description: Subject matter wherein additional impedance which may be inductive, capacitive or resistive is included in either the primary or secondary winding circuit of the transformer which couples the signal between the two cascaded amplifier devices.

Patents under this class:

Patent Number Title Of Patent Date Issued
6952159 Coupling device Oct. 4, 2005
5528630 Coupler for communication systems which utilize more than one frequency band Jun. 18, 1996
5404113 High efficiency power amplifier Apr. 4, 1995
5345189 Vectorial signal combiner for generating an amplitude modulated carrier by adding two phase modulated constant envelope carriers Sep. 6, 1994
4703283 Isolation amplifier with T-type modulator Oct. 27, 1987
4551686 Coupling filter, especially an input filter, for receivers of centralized ripple control systems Nov. 5, 1985
4105941 Driver for reactive load Aug. 8, 1978
4000473 Isolation amplifier Dec. 28, 1976

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