US PATENT SUBCLASS 330 / 271-- .~.~ Having signal feedback means

US PATENT SUBCLASS 330 / 271
.~.~ Having signal feedback means

Current as of: June, 1999
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330 /	HD	AMPLIFIERS

250	DF	WITH SEMICONDUCTOR AMPLIFYING DEVICE (E.G., TRANSISTOR) {21}
262	DF	.~ Including push-pull amplifier {8}
271		.~.~ Having signal feedback means

DEFINITION

Classification: 330/271

Having signal feedback means:

(under subclass 262) Subject matter wherein a portion of the electrical signal output energy is applied to the input of the amplifier.

(1) Note. There is a shared impedance for the input and output circuits involved.

(2) Note. The amplifier of this subclass may be any stage or group of stages of a cascaded amplifier.

SEE OR SEARCH THIS CLASS, SUBCLASS:

9, for amplifiers with periodic switching input-output comparison including those with feedback circuits.

75+, appropriate subclasses for vacuum tube signal feedback amplifiers.

265, for feedback in complementary push-pull amplifiers. 282, for signal feedback in gain control circuits.

291, for feedback in other transistor amplifiers.