US PATENT SUBCLASS 334 / 11
TUNER UNIT DIRECTLY RESPONSIVE TO VOLTAGE AND/OR CURRENT VARIATION


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



334 /   HD   TUNERS

11TUNER UNIT DIRECTLY RESPONSIVE TO VOLTAGE AND/OR CURRENT VARIATION {2}
12  DF  .~> Saturable core-type inductor {1}
14  DF  .~> Reactance tuning {2}


DEFINITION

Classification: 334/11

(under the class definition) Subject matter wherein the tuned circuit includes a reactance element or elements which are directly responsive to a change in voltage and/or current which is applied across or through the reactance element or elements, with the variation in the voltage and/or current causing the reactance value of the element or elements to vary or change and thereby tune or adjust the resonance of the tuned circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4, for tuners which are responsive to an external magnetic field, e.g., the magnetic field is that of a spatially movable permanent magnet.

5+, for tuners which are responsive to an external nonelectrical stimulus or condition.

SEE OR SEARCH CLASS

257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes), appropriate subclasses for active solid-state devices, per se.

307, Electrical Transmission or Interconnection Systems, 401+, for miscellaneous nonlinear reactor systems.

330, Amplifiers,

145, for amplifiers having variable impedance elements which are directly responsive to voltage or current variations.

361, Electricity: Electrical Systems and Devices,

277+, for variable capacitors, per se.

455, Telecommunications, appropriate subclasses.