(under the class definition) Subject matter wherein two or more elements such as resistors, reactors, etc.., of any coupling network or different coupling networks, for transmission of the signal in the amplifier are constructed and arranged so that adjustment or control is simultaneous for such two or more elements, such adjustment may be for a tuner, a potentiometer, or any other means or any combination of such means, in the coupling circuits or associated circuits.
SEE OR SEARCH THIS CLASS, SUBCLASS:
53+, particularly subclass 56 for distributed parameter coupling means including adjustment of such means.
65+, for structure of circuit elements when in an amplifier which may include the structure of adjustable circuit elements.
108, for a potentiometer common to the signal and feedback paths of an amplifier.
116, and 117, for amplifiers with balanced-to-unbalanced and unbalanced-to-balanced coupling, respectively, which may involve adjustable circuit elements. 120, and 122, for coupling of a push-pull amplifier which may involve adjustable circuit elements in the coupling.
143, for amplifiers with a thermally responsive impedance.
144+, for amplifiers having a variable impedance for the signal channel controlled by a separate control path.
157+, for amplifiers with interstage coupling which may have an adjustable element in the coupling.
171, 190 and 197, for transformer structure.
185+, for amplifiers which may have an adjustable element in the input coupling.
192+, for amplifiers which may have an adjustable element in the output coupling.
SEE OR SEARCH CLASS
333, Wave Transmission Lines and Networks,
24+, 81 and 219+ for coupling means, attenuators, or distributed parameter type resonators, respectively, including those with variable circuit elements.
334, Tuners, appropriate subclasses for tuners, per se.
336, Inductor Devices, appropriate subclasses for variable inductor devices. 338, Electrical Resistors, appropriate subclasses for the structure of rheostats, and resistors.
