US PATENT SUBCLASS 330 / 101
.~ Positive and negative feedback in same path at different frequencies


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330 /   HD   AMPLIFIERS

75  DF  SIGNAL FEEDBACK {20}
101.~ Positive and negative feedback in same path at different frequencies


DEFINITION

Classification: 330/101

(under subclass 75) Subject matter wherein a single signal feedback circuit means through an impedance shared by the same input and output circuits has for currents flowing through the same shared feedback impedance at one frequency a signal feedback in phase (positive feedback) with the signal input where the signal feedback is applied and at least at some other frequency a signal feedback component flowing through the same feedback impedance, in opposite phase with the signal (negative feedback).

SEE OR SEARCH THIS CLASS, SUBCLASS:

82, for amplifiers having at least one stage of push-pull amplification including both positive and negative feedback.

89, for cascaded amplifiers having cathode-cathode signal feedback between adjacent stages.

93, for amplifiers having cathode impedance feedback and positive feedback.

104, for amplifiers having multiple signal feedbacks including both positive and negative feedback.