US PATENT SUBCLASS 455 / 196.1
.~.~ Including variation of local oscillator frequency

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

Internet Version by PATENTEC © 1999      Terms of Use


455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
150.1  DF  .~ Signal selection based on frequency (e.g., tuning) {13}
196.1.~.~ Including variation of local oscillator frequency {1}
197.1  DF  .~.~.~> By simultaneous control with signal selection {3}

DEFINITION

Classification: 455/196.1

Including variation of local oscillator frequency:

(under subclass 150.1) Subject matter which includes a variable frequency source of unmodulated oscillation.

(1) Note. Signal frequency selection effected by frequency variation of the oscillation source is classified herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

320, for a frequency converter with a local oscillator in which the coupling means is variably tuned.