(under the class definition) Subject matter wherein means are provided to by-pass all or a part of the signal across the amplifier or of one or more stages of a cascade amplifier.
(1) Note. For classification herein the by-pass means must be free of any amplifying device. Subject matter having such additional amplifying device is not in this subclass.
(2) Note. This subclass includes subject matter involving a cascaded amplifier, for switching an amplifier device in or out of the cascaded arrangement.
SEE OR SEARCH THIS CLASS, SUBCLASS:
53+, for amplifiers having distributed parameter coupling means, particularly subclass 54 for distributed amplifiers.
70+, for series energized amplifiers including cascaded amplifiers having such arrangement.
84, for signal feedback amplifiers having plural amplifier channels. 88+, 92, and 98+, for cascaded amplifiers having signal feedback.
120+, for cascaded push-pull amplifiers.
124+, for by-pass means having additional amplifying device. See (1) Note above.
133, for cascaded amplifiers having different bias control for different stages.
145, for amplifiers having a separately controlled tube in the signal path.
147, and 148, for amplifiers having plural signal inputs and plural signal outputs, respectively.
157, for amplifier interstage couplings, per se, particularly subclass 164, for an electronic tube or diode in the coupling circuit.
310+, for cascaded semiconductor amplifiers.
SEE OR SEARCH CLASS
333, Wave Transmission Lines and Networks,
100+, for wave transmission passive network branched circuits.
