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Class Information
Number: 329
Name: Demodulators >
Description: A. BASIC SUBJECT MATTER OF CLASS










Class Number Class Name No. of Patents
329/347

Amplitude modulation demodulator

94
329/371

Coherer type demodulator

4
329/368

Electron discharge demodulator device having more than two electrodes (e.g., triode, tetrode etc.)

1
329/348

Having plural demodulation outputs

43
329/349

Having specific distortion, noise or other interference prevention, reduction or compensation

83
329/350

Automatic amplitude stabilization or control

27
329/353

Noise reduction or compensation

41
329/351

Nonlinearity reduction or compensation

12
329/352

Temperature compensation

10
329/370

Including diode demodulator device

31
329/354

Including microwave or distributed parameter structure

15
329/355

With electron discharge device

0
329/367

Including regenerative feedback in non-oscillating demodulator

1
329/369

Including three or more terminal discrete semiconductor demodulator device

31
329/358

Input signal combined with local oscillator or carrier frequency signal (e.g., synchronous demodulator)

60
329/360

Including phase or frequency locked loop

93
329/361

Including sampling, gating, or switching

56
329/362

With three or more terminal discrete semiconductor device

21
329/359

Input signal applied directly to local oscillator

13
329/363

Input signal split into plural signals

37
329/365

Including diode demodulator device

10
329/366

Plural diodes

18
329/364

Including three or more terminal discrete semiconductor device

18
329/357

Single or vestigial sideband type

55
329/356

Suppressed carrier double sideband type

24
329/315

Frequency modulation demodulator

91
329/318

Having specific distortion, noise or other interference prevention, reduction or compensation

132
329/320

By cancelling distortion, noise or other interference

76
329/321

Using amplitude limiting within the demodulator

39
329/319

Using feedback to reduce distortion, noise or other interference

74
329/322

Including microwave or distributed parameter structure

14
329/344

Including signal passed through single demodulating path including resonant circuit

6
329/323

Input signal combined with local oscillator or carrier frequency signal

70
329/325

Including phase or frequency locked loop

176
329/326

Including discrete semiconductor device

33
329/324

Input signal applied directly to local oscillator

22
329/341

Input signal converted to and processed in pulse form (e.g., pulse counter or digital type demodulator)

87
329/343

Including digital logic circuitry

69
329/342

Including discrete semiconductor device

21
329/327

Input signal split into plural signals

66
329/328

Including piezoelectric resonant element

15
329/340

Including plural detector diodes (e.g., ratio detector type)

16
329/336

Input signal combined with phase shifted or delayed portion of input signal

96
329/337

Including lc resonant phase shift circuit

53
329/338

Input signal split by lc resonant circuit

0
329/339

Including lc resonant circuits tuned above and below input signal carrier frequency

6
329/329

Using a transformer to split input signal

4
329/335

Including plural detector diodes (e.g., ratio detector type)

5
329/332

Signals taken from plural secondary windings

1
329/333

Including plural detector diodes (e.g., ratio detector type)

5
329/334

Including resonant circuits tuned above and below input signal carrier frequency

3
329/330

Signals taken from primary and secondary windings

2
329/331

Including plural detector diodes (e.g., ratio detector type)

1
329/316

Plural demodulation

72
329/317

Including amplitude demodulation

40
329/300

Frequency shift keying or minimum shift keying demodulator

214
329/301

Including discrete semiconductor device

19
329/303

Including logic element (e.g., logic gate or flip-flop

99
329/302

Input signal combined with local oscillator or carrier frequency signal

139
329/372

Miscellaneous

12
329/345

Phase modulation demodulator

89
329/346

Input signal combined with local oscillator or carrier frequency signal

89
329/304

Phase shift keying or quadrature amplitude demodulator

575
329/305

Including discrete semiconductor device

33
329/310

Including logic element (e.g., logic gate or flip-flop)

133
329/306

Input signal combined with local oscillator or carrier frequency signal

239
329/307

Including phase or frequency locked loop

191
329/308

With parallel signal combiners (e.g., costas loop)

146
329/309

Including logic element (e.g., logic gate or flip-flop)

68
329/311

Pulse or interrupted continuous wave demodulator

136
329/313

Pulse position, frequency, phase or spacing demodulator

79
329/314

Including discrete semiconductor device

11
329/312

Pulse width demodulator

74
 
 
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