US PATENT SUBCLASS 455 / 318
.~.~ With specified local oscillator structure or coupling

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
313  DF  .~ Frequency modifying or conversion {4}
318.~.~ With specified local oscillator structure or coupling {2}
319  DF  .~.~.~> With particular coupling {1}
321  DF  .~.~.~> In a single envelope or with common active element (e.g., autodyne) {1}

DEFINITION

Classification: 455/318

With specified local oscillator structure or coupling:

(under subclass 313) Subject matter including significant details of either (a) at least one source of unmodulated signal for frequency conversion, or (b) circuitry connecting a source of unmodulated signal to a frequency conversion device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

196.1+, for signal selection based on frequency including variation of local oscillator frequency.

255+, for control of local oscillator frequency.