US PATENT SUBCLASS 329 / 347
AMPLITUDE MODULATION DEMODULATOR

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

Internet Version by PATENTEC © 1999      Terms of Use


329 /   HD   DEMODULATORS

347AMPLITUDE MODULATION DEMODULATOR {12}
348  DF  .~> Having plural demodulation outputs
349  DF  .~> Having specific distortion, noise or other interference prevention, reduction or compensation {4}
354  DF  .~> Including microwave or distributed parameter structure {1}
356  DF  .~> Suppressed carrier double sideband type
357  DF  .~> Single or vestigial sideband type
358  DF  .~> Input signal combined with local oscillator or carrier frequency signal (e.g., synchronous demodulator) {3}
363  DF  .~> Input signal split into plural signals {2}
367  DF  .~> Including regenerative feedback in non-oscillating demodulator
368  DF  .~> Electron discharge demodulator device having more than two electrodes (e.g., triode, tetrode etc.)
369  DF  .~> Including three or more terminal discrete semiconductor demodulator device
370  DF  .~> Including diode demodulator device
371  DF  .~> Coherer type demodulator

DEFINITION

Classification: 329/347

AMPLITUDE MODULATION DEMODULATOR:

(under the class definition) Subject matter where the demodulator extracts the modulating signal from an input AM signal.

(1) Note. Amplitude modulation is achieved by varying the amplitude of a carrier over a continuum of values in

accordance with a modulating signal.

(2) Note. This subclass includes amplitude modulation demodulators, per se. See the SEARCH CLASS note below for combinations with the subject matter of this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

311+, for a pulse demodulator.

315+, for frequency modulation demodulator.

345+, for a phase modulation demodulator. SEE OR SEARCH CLASS

455, Telecommunications,

130+, for a telecommunication receiver utilizing an amplitude modulation demodulator as a subcombination thereof.