US PATENT SUBCLASS 455 / 142
.~ Convertible to different type (e.g., AM to FM)

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
142.~ Convertible to different type (e.g., AM to FM) {2}
143  DF  .~.~> With distinct signal path for each type
144  DF  .~.~> With dual purpose amplifying or other stage

DEFINITION

Classification: 455/142

Convertible to different type (e.g., AM to FM):

(under subclass 130) Subject matter comprising a receiver whose circuit can be changed to receive at least two different types of modulation, for example, amplitude or frequency modulated waves.

(1) Note. Such receivers may be of the superheterodyne type and employ a common pre-amplifier, converter, and intermediate frequency stage for both types of modulation.

SEE OR SEARCH CLASS

370, Multiplex Communications, appropriate subclasses for digital combined with analog transmission.

375, Pulse or Digital Communications

216, for digital convertible to/from analog.