US PATENT SUBCLASS 330 / 109
.~ Frequency responsive feedback means


Current as of: June, 1999
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330 /   HD   AMPLIFIERS

75  DF  SIGNAL FEEDBACK {20}
109.~ Frequency responsive feedback means


DEFINITION

Classification: 330/109

(under subclass 75) Subject matter wherein the "signal feedback circuit means" includes circuit means which acts on the signal feedback to affect some frequency component of the signal feedback differently from the other frequency components of the signal, as for example, a tuned circuit which eliminates a frequency component of the signal feedback or an equalizer which emphasizes or de-emphasizes the amplitude of some frequency range of the signal feedback with respect to others.

SEE OR SEARCH THIS CLASS, SUBCLASS:

94, for frequency responsive cathode impedance feedback

means.

107, for signal feedback amplifiers including phase shift means in the loop path including those involving frequency responsive feedback means.

SEE OR SEARCH CLASS

333, Wave Transmission Lines and Networks, 28, and 167+ for frequency responsive passive coupling networks in general. See the search notes thereunder.