Class 332: MODULATORS ( Manual of U.S. Patent Classification )

U.S. PATENT AND TRADEMARK OFFICE
Information Products Division

[Manual of Classification, Class Listing]

Manual of U.S. Patent Classification
as of June 30, 2000

Class
332
MODULATORS

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Subclass		Title
ClassTitle		===> MODULATORS

100		FREQUENCY SHIFT KEYING MODULATOR OR MINIMUM SHIFT KEYING MODULATOR
101		. Including logic element (e.g., logic gate or flip-flop)
102		. Including discrete semiconductor device
103		PHASE SHIFT KEYING MODULATOR OR QUADRATURE AMPLITUDE MODULATOR
104		. Including logic element (e.g., logic gate or flip-flop)
105		. Including discrete semiconductor device
106		PULSE OR INTERRUPTED CONTINUOUS WAVE MODULATOR
107		. Including stabilization or alternatively distortion, noise or other interference prevention, reduction or compensation
108		. Plural modulation
109		. Pulse width modulator
110		. . Including discrete semiconductor device having three or more electrodes
111		. . Including electron discharge device
112		. Pulse position, frequency, phase, or spacing modulator
113		. . Including discrete semiconductor device having three or more electrodes
114		. . Including electron discharge device
115		. Pulse amplitude modulator
116		. . Including discrete semiconductor device having three or more electrodes
117		FREQUENCY MODULATOR
118		. Including measuring or indicating
119		. Plural modulation
120		. . Including amplitude modulation
121		. . . Including electron discharge device
122		. . Including electron discharge device
123		. Including stabilization or alternatively distortion, noise or other interference prevention, reduction, or compensation
124		. . Nonlinearity reduction or compensation
125		. . Automatic amplitude stabilization or control
126		. . Automatic frequency stabilization or control
127		. . . Phase or frequency locked loop
128		. . . . Modulating signal applied to plural elements of the loop
129		. Including microwave or distributed parameter structure
130		. . With discrete semiconductor device
131		. . With electron discharge device
132		. . . Magnetron type
133		. . . Klystron type
134		. . . Travelling wave type
135		. Including discrete semiconductor device
136		. . With varactor
137		. Including electron discharge device
138		. . Particular oscillator circuit
139		. . . Crystal oscillator type
140		. . . . With separate modulator tube (e.g., reactance tube)
141		. . . L-C oscillator type
142		. . . . With separate modulator tube (e.g., reactance tube)
143		. . . . . Plural modulator tubes
144		PHASE MODULATOR
145		. Including amplitude modulator
146		. Including discrete semiconductor device
147		. Including electron discharge device
148		. . Push-pull circuit
149		AMPLITUDE MODULATOR
150		. Including measuring or indicating
151		. Plural modulation
152		. . Including discrete semiconductor device
153		. . Including electron discharge device
154		. . . Push-pull circuit
155		. Percent modulation control or automatic amplitude control of carrier or modulating signal
156		. . Overmodulation prevention
157		. . Average carrier amplitude controlled by modulating signal
158		. . Carrier output suppressed during absence of modulating signal
159		. Including stabilization or alternatively distortion, noise or other interference prevention, reduction or compensation
160		. . Reduction or compensation of nonlinearity in modulation characteristic
161		. . Reduction of carrier phase or frequency variations or modulation
162		. . Using feedback to reduce distortion, noise or other interference
163		. Including microwave or distributed parameter structure
164		. . With discrete semiconductor device
165		. . With electron discharge device
166		. . . Magnetron type
167		. Suppressed carrier double sideband type
168		. . Including discrete semiconductor device
169		. . Including electron discharge device
170		. Single or vestigial sideband type
171		. . Including electron discharge device
172		. Modulating signal applied to a bridge circuit
173		. Magnetic field varied by modulating signal
174		. Resistive or dissipative device controlled by modulating signal (e.g., loss modulator)
175		. Variable reactance controlled by modulating signal
176		. Nonlinear device controlled by modulating signal
177		. . Nonlinear discrete semiconductor device
178		. Including discrete semiconductor device
179		. Including electron discharge device
180		. . Push-pull circuit
181		. . Plate circuit modulation
182		. . Grid circuit modulation
183		MODULATION CONVERTER HAVING PRE-MODULATED INPUT (E.G., FM TO AM)
184		. Between diverse pulse modulation types
185		MISCELLANEOUS

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Last Modified: 6 October 2000

Manual of U.S. Patent Classification as of June 30, 2000

Class 332 MODULATORS

Manual of U.S. Patent Classification
as of June 30, 2000

Class
332
MODULATORS