(under the class definition) Subject matter wherein the amplifying device is a nonlinear capacitor.
(1) Note. A nonlinear capacitor is one in which for any frequency, the ratio of the voltage across the capacitor to the current flowing through it, is not linear.
(2) Note. To be classified in this class the output signal must be a substantial replica of the input signal. Subject matter involving nonlinear capacitors in which the power supply, which is controlled by the signal, is A.C. must include filter means claimed to eliminate the A.C. power supply from the output signal or classification is in Class 307, Electrical Transmission or Interconnection Systems, subclasses 40+. However subject matter involving nonlinear capacitor amplifying devices wherein an A.C., power supply is used and claiming a demodulator will be classified herein even where the output filter is not claimed, if the filter is disclosed. It will be assumed to be part of the claimed demodulator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
8, for amplifiers having saturable reactor type amplifying devices.
10, for amplifiers of the modulator-demodulator type.
86, for signal feedback amplifiers with variable impedance controlled by a separate path. 95, and 110, for signal feedback amplifiers with nonlinear impedance means.
143, for amplifiers having a thermally responsive impedance.
144+, for amplifiers having a variable impedance for the signal channel controlled by a separate control path.
164, for amplifiers having an electronic tube or diode in an interstage coupling means.
174, for amplifiers having an electromechanical transducer (e.g., piezoelectric crystal) in an interstage coupling means.
183, for amplifiers having a nonlinear device in an interstage D.C.. coupling means.
250+, for amplifiers having semiconductor type amplifying devices, particularly subclass 287.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems,
401+, for nonlinear reactor systems.
361, Electricity: Electrical Systems and Devices, 271+, and 500+ for capacitors, per se.
