US PATENT SUBCLASS 455 / 337
.~.~ Discriminator or demodulator


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}
337.~.~ Discriminator or demodulator


DEFINITION

Classification: 455/337

Discriminator or demodulator:

(under subclass 334) Systems including discriminator or demodulator means associated with sufficient significant circuitry so as to be limited to use in a receiver system.

(1) Note. Some examples of subject matter to be found in this subclass are detector means in combination with antenna means and frequency discriminator means deriving an output other than the modulation signal, etc.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, particularly

2+, for miscellaneous phase discrimination, subclasses 39+ for miscellaneous frequency discrimination, and subclasses 334+ for a miscellaneous circuit providing an output which is a nonlinear function of an input.

329, Demodulators,

315+, 345+ and 347+ for frequency, phase or amplitude demodulators, respectively. See also the Class Definition of Class 329 for additional relevant areas of search.