US PATENT SUBCLASS 455 / 326
.~.~.~.~ With balanced mixer

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}
323  DF  .~.~ Particular frequency conversion structure or circuitry {5}
325  DF  .~.~.~ Including distributed electrical parameter structure {3}
326.~.~.~.~ With balanced mixer {2}
327  DF  .~.~.~.~.~> Stripline
328  DF  .~.~.~.~.~> Hollow waveguide

DEFINITION

Classification: 455/326

With balanced mixer:

(under subclass 325) Systems including two or more identical frequency conversion devices arranged in conjugate relationship about a neutral or grounded point, the output of the system comprising a linear combination of the separate input signals.

(1) Note. The subject matter to be found here will include systems in which input signals are applied to the input of the mixer or conversion devices 180 apart, with the output signal being derived in additive relationship (i.e., push-pull).

SEE OR SEARCH CLASS

332, Modulators,

154, and 180 for push-pull circuits in an amplitude modulator and subclass 172 for an amplitude modulator utilizing a bridge circuit.