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Class Information
Number: 332
Name: Modulators >
Description: A. BASIC SUBJECT MATTER OF CLASS










Class Number Class Name No. of Patents
332/149

Amplitude modulator

112
332/178

Including discrete semiconductor device

66
332/179

Including electron discharge device

2
332/182

Grid circuit modulation

6
332/181

Plate circuit modulation

4
332/180

Push-pull circuit

2
332/150

Including measuring or indicating

18
332/163

Including microwave or distributed parameter structure

13
332/164

With discrete semiconductor device

21
332/165

With electron discharge device

1
332/166

Magnetron type

1
332/159

Including stabilization or alternatively distortion, noise or other interference prevention, reduction or compensation

81
332/161

Reduction of carrier phase or frequency variations or modulation

13
332/160

Reduction or compensation of nonlinearity in modulation characteristic

36
332/162

Using feedback to reduce distortion, noise or other interference

63
332/173

Magnetic field varied by modulating signal

4
332/172

Modulating signal applied to a bridge circuit

12
332/176

Nonlinear device controlled by modulating signal

6
332/177

Nonlinear discrete semiconductor device

10
332/155

Percent modulation control or automatic amplitude control of carrier or modulating signal

20
332/157

Average carrier amplitude controlled by modulating signal

8
332/158

Carrier output suppressed during absence of modulating signal

4
332/156

Overmodulation prevention

6
332/151

Plural modulation

107
332/152

Including discrete semiconductor device

42
332/153

Including electron discharge device

3
332/154

Push-pull circuit

2
332/174

Resistive or dissipative device controlled by modulating signal (e.g., loss modulator)

8
332/170

Single or vestigial sideband type

84
332/171

Including electron discharge device

0
332/167

Suppressed carrier double sideband type

25
332/168

Including discrete semiconductor device

15
332/169

Including electron discharge device

3
332/175

Variable reactance controlled by modulating signal

5
332/117

Frequency modulator

122
332/135

Including discrete semiconductor device

42
332/136

With varactor

67
332/137

Including electron discharge device

0
332/138

Particular oscillator circuit

4
332/139

Crystal oscillator type

2
332/140

With separate modulator tube (e.g., reactance tube)

0
332/141

L-c oscillator type

12
332/142

With separate modulator tube (e.g., reactance tube)

0
332/143

Plural modulator tubes

1
332/118

Including measuring or indicating

26
332/129

Including microwave or distributed parameter structure

9
332/130

With discrete semiconductor device

18
332/131

With electron discharge device

2
332/133

Klystron type

2
332/132

Magnetron type

3
332/134

Travelling wave type

3
332/123

Including stabilization or alternatively distortion, noise or other interference prevention, reduction, or compensation

112
332/125

Automatic amplitude stabilization or control

20
332/126

Automatic frequency stabilization or control

23
332/127

Phase or frequency locked loop

259
332/128

Modulating signal applied to plural elements of the loop

121
332/124

Nonlinearity reduction or compensation

60
332/119

Plural modulation

85
332/120

Including amplitude modulation

48
332/121

Including electron discharge device

0
332/122

Including electron discharge device

0
332/100

Frequency shift keying modulator or minimum shift keying modulator

188
332/102

Including discrete semiconductor device

34
332/101

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

70
332/185

Miscellaneous

16
332/183

Modulation converter having pre-modulated input (e.g., fm to am)

21
332/184

Between diverse pulse modulation types

3
332/144

Phase modulator

146
332/145

Including amplitude modulator

125
332/146

Including discrete semiconductor device

43
332/147

Including electron discharge device

0
332/148

Push-pull circuit

1
332/103

Phase shift keying modulator or quadrature amplitude modulator

588
332/105

Including discrete semiconductor device

82
332/104

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

111
332/106

Pulse or interrupted continuous wave modulator

126
332/107

Including stabilization or alternatively distortion, noise or other interference prevention, reduction or compensation

99
332/108

Plural modulation

58
332/115

Pulse amplitude modulator

54
332/116

Including discrete semiconductor device having three or more electrodes

26
332/112

Pulse position, frequency, phase, or spacing modulator

107
332/113

Including discrete semiconductor device having three or more electrodes

16
332/114

Including electron discharge device

3
332/109

Pulse width modulator

300
332/110

Including discrete semiconductor device having three or more electrodes

56
332/111

Including electron discharge device

12
 
 
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