US Patent Class 329
DEMODULATORS
 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| Electronic File Wrappers | Electronic Patent Documents | Paper Patent Documents | Current as of: June, 1999
| and Services |
| DF | CLASS NOTES | |
| 300 | DF | FREQUENCY SHIFT KEYING OR MINIMUM SHIFT KEYING DEMODULATOR |
| 301 | DF | .~ Including discrete semiconductor device |
| 302 | DF | .~ Input signal combined with local oscillator or carrier frequency signal |
| 303 | DF | .~ Including logic element (e.g., logic gate or flip-flop |
| 304 | DF | PHASE SHIFT KEYING OR QUADRATURE AMPLITUDE DEMODULATOR |
| 305 | DF | .~ Including discrete semiconductor device |
| 306 | DF | .~ Input signal combined with local oscillator or carrier frequency signal |
| 307 | DF | .~.~ Including phase or frequency locked loop |
| 308 | DF | .~.~.~ With parallel signal combiners (e.g., Costas loop) |
| 309 | DF | .~.~.~.~ Including logic element (e.g., logic gate or flip-flop) |
| 310 | DF | .~ Including logic element (e.g., logic gate or flip-flop) |
| 311 | DF | PULSE OR INTERRUPTED CONTINUOUS WAVE DEMODULATOR |
| 312 | DF | .~ Pulse width demodulator |
| 313 | DF | .~ Pulse position, frequency, phase or spacing demodulator |
| 314 | DF | .~.~ Including discrete semiconductor device |
| 315 | DF | FREQUENCY MODULATION DEMODULATOR |
| 316 | DF | .~ Plural demodulation |
| 317 | DF | .~.~ Including amplitude demodulation |
| 318 | DF | .~ Having specific distortion, noise or other interference prevention, reduction or compensation |
| 319 | DF | .~.~ Using feedback to reduce distortion, noise or other interference |
| 320 | DF | .~.~ By cancelling distortion, noise or other interference |
| 321 | DF | .~.~ Using amplitude limiting within the demodulator |
| 322 | DF | .~ Including microwave or distributed parameter structure |
| 323 | DF | .~ Input signal combined with local oscillator or carrier frequency signal |
| 324 | DF | .~.~ Input signal applied directly to local oscillator |
| 325 | DF | .~.~ Including phase or frequency locked loop |
| 326 | DF | .~.~.~ Including discrete semiconductor device |
| 327 | DF | .~ Input signal split into plural signals |
| 328 | DF | .~.~ Including piezoelectric resonant element |
| 329 | DF | .~.~ Using a transformer to split input signal |
| 330 | DF | .~.~.~ Signals taken from primary and secondary windings |
| 331 | DF | .~.~.~.~ Including plural detector diodes (e.g., ratio detector type) |
| 332 | DF | .~.~.~ Signals taken from plural secondary windings |
| 333 | DF | .~.~.~.~ Including plural detector diodes (e.g., ratio detector type) |
| 334 | DF | .~.~.~.~.~ Including resonant circuits tuned above and below input signal carrier frequency |
| 335 | DF | .~.~.~ Including plural detector diodes (e.g., ratio detector type) |
| 336 | DF | .~.~ Input signal combined with phase shifted or delayed portion of input signal |
| 337 | DF | .~.~.~ Including LC resonant phase shift circuit |
| 338 | DF | .~.~ Input signal split by LC resonant circuit |
| 339 | DF | .~.~.~ Including LC resonant circuits tuned above and below input signal carrier frequency |
| 340 | DF | .~.~ Including plural detector diodes (e.g., ratio detector type) |
| 341 | DF | .~ Input signal converted to and processed in pulse form (e.g., pulse counter or digital type demodulator) |
| 342 | DF | .~.~ Including discrete semiconductor device |
| 343 | DF | .~.~ Including digital logic circuitry |
| 344 | DF | .~ Including signal passed through single demodulating path including resonant circuit |
| 345 | DF | PHASE MODULATION DEMODULATOR |
| 346 | DF | .~ Input signal combined with local oscillator or carrier frequency signal |
| 347 | DF | AMPLITUDE MODULATION DEMODULATOR |
| 348 | DF | .~ Having plural demodulation outputs |
| 349 | DF | .~ Having specific distortion, noise or other interference prevention, reduction or compensation |
| 350 | DF | .~.~ Automatic amplitude stabilization or control |
| 351 | DF | .~.~ Nonlinearity reduction or compensation |
| 352 | DF | .~.~ Temperature compensation |
| 353 | DF | .~.~ Noise reduction or compensation |
| 354 | DF | .~ Including microwave or distributed parameter structure |
| 355 | DF | .~.~ With electron discharge device |
| 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) |
| 359 | DF | .~.~ Input signal applied directly to local oscillator |
| 360 | DF | .~.~ Including phase or frequency locked loop |
| 361 | DF | .~.~ Including sampling, gating, or switching |
| 362 | DF | .~.~.~ With three or more terminal discrete semiconductor device |
| 363 | DF | .~ Input signal split into plural signals |
| 364 | DF | .~.~ Including three or more terminal discrete semiconductor device |
| 365 | DF | .~.~ Including diode demodulator device |
| 366 | DF | .~.~.~ Plural diodes |
| 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 |
| 372 | DF | MISCELLANEOUS |