(under subclass 103) Subject matter including at least one signal feedback means having a component of the signal feedback in phase with the signal at the point in the circuit where the signal is applied and at least one signal feedback circuit means having a signal feedback component which is in phase opposition with the signal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
82, for push-pull amplifiers having negative and positive feedback means.
89, for cascaded amplifiers having cathode-cathode signal feedback between adjacent stages.
93, for cathode impedance feedback combined with diverse type feedback coupling including positive feedback.
101, for positive and negative feedback in the same path at different frequencies.
SEE OR SEARCH CLASS 329, Demodulators,
367, for an amplitude demodulator utilizing regenerative feedback.
331, Oscillators, appropriate subclasses for oscillators operating on the positive feedback principle.
333, Wave Transmission Lines and Networks,
213+, for negative resistance and/or reactance networks of the active element type which usually include positive feedback.
455, Telecommunications,
336, for superregenerative receivers; and subclass 337 for regenerative receivers.
