US PATENT SUBCLASS 455 / 340
.~.~.~ Variably tunable or adjustable

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
334  DF  .~ With particular receiver circuit {6}
338  DF  .~.~ Coupling or decoupling between stages {2}
340.~.~.~ Variably tunable or adjustable

DEFINITION

Classification: 455/340

Variably tunable or adjustable:

(under subclass 338) Systems wherein the coupling or decoupling means is recited as variably tunable or adjustable whereby the extent of the effective coupling or the width of the band passed by the network may be varied.

SEE OR SEARCH THIS CLASS, SUBCLASS:

191, for band selection receivers with a plurality of tunable coupled tube stages.

266, for receivers with selectivity or bandwidth control means.

289, for variable coupling means between antenna and receiver.