CLASS 332, MODULATORS |
100 | FREQUENCY SHIFT KEYING MODULATOR OR MINIMUM SHIFT KEYING MODULATOR: |
This subclass is indented under the class definition. Subject matter in which the frequency of the carrier is
shifted among a plurality of discrete values in accordance with
the modulating signal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||
101 | . Including logic element (e.g., logic gate or flip-flop): |
This subclass is indented under subclass 100. Subject matter containing a component which performs a Boolean
Algebraic operation.
| |||
102 | . Including discrete semiconductor device: |
This subclass is indented under subclass 100. Subject matter containing an electrical device whose constituent
portions are constructed from solid material having room temperature conductivity
between that of a conductor and an insulator and which conductivity
is typically modified through the addition of small amounts of dopant.
| |||
103 | PHASE SHIFT KEYING MODULATOR OR QUADRATURE AMPLITUDE MODULATOR: |
This subclass is indented under the class definition. Subject matter in which the phase of the carrier is shifted
among a plurality of discrete angles in accordance with the modulating
signal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||
104 | . Including logic element (e.g., logic gate or flip-flop): |
This subclass is indented under subclass 103. Subject matter containing a component which performs a Boolean
Algebraic operation.
| |||
105 | . Including discrete semiconductor device: |
This subclass is indented under subclass 103. Subject matter containing an electrical device whose constituent
portions are constructed from solid material having room temperature conductivity
between that of a conductor and an insulator and which conductivity
is typically modified through the addition of small amounts of dopant.
| |||
106 | PULSE OR INTERRUPTED CONTINUOUS WAVE MODULATOR: |
This subclass is indented under the class definition. Subject matter producing a final output signal consisting
of a repetitious pulse wave or a pulsed continuous wave having one
or more of its characteristics varied in accordance with one or
more modulating signals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||||||||
107 | . Including stabilization or alternatively distortion, noise or other interference prevention, reduction, or compensation: |
This subclass is indented under subclass 106. Subject matter including the neutralization of an undesirable
characteristic of a pulse modulator or its signals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||
108 | . Plural modulation: |
This subclass is indented under subclass 106. Subject matter having a plurality of modulators, modulating
signals, or diverse output modulation types simultaneously present
or individually selectable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||||
109 | . Pulse width modulator: |
This subclass is indented under subclass 106. Subject matter producing a pulse wave output signal in which
the pulse width (duration) is varied by the modulating signal.
SEE OR SEARCH CLASS:
| |||
110 | .. Including discrete semiconductor device having three or more electrodes: |
This subclass is indented under subclass 109. Subject matter utilizing a device with three external connection
points where the constituent portions of the device are constructed
from solid material having room temperature conductivity between
that of a conductor and an insulator and which conductivity is typically modified
through the addition of small amounts of dopant.
| |||
111 | .. Including electron discharge device: |
This subclass is indented under subclass 109. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
112 | . Pulse position, frequency, phase, or spacing modulator: |
This subclass is indented under subclass 106. Subject matter producing a pulse wave output signal in which
the relative positions of the pulses, the frequency (repetition
rate) of the pulses, the phase of the pulses, or the spacing (time)
between the pulses is varied by the modulating signal.
SEE OR SEARCH CLASS:
| |||
113 | .. Including discrete semiconductor device having three or more electrodes: |
This subclass is indented under subclass 112. Subject matter utilizing a device with three external connection
points where the constituent portions of the device are constructed
from solid material having room temperature conductivity between
that of a conductor and an insulator and which conductivity is typically modified
through the addition of small amounts of dopant.
| |||
114 | .. Including electron discharge device: |
This subclass is indented under subclass 112. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
115 | . Pulse amplitude modulator: |
This subclass is indented under subclass 106. Subject matter producing a pulse wave output signal in which
the amplitude of the pulses is controlled by the modulating signal.
SEE OR SEARCH CLASS:
| |||
116 | .. Including discrete semiconductor device having three or more electrodes: |
This subclass is indented under subclass 115. Subject matter utilizing a device with three external connection
points where the constituent portions of the device are constructed
from solid material having room temperature conductivity between
that of a conductor and an insulator and which conductivity is typically modified
through the addition of small amounts of dopant.
| |||
117 | FREQUENCY MODULATOR: |
This subclass is indented under the class definition. Subject matter in which the frequency of the carrier is
varied over a continuum of values in accordance with the modulating
signal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||
118 | . Including measuring or indicating: |
This subclass is indented under subclass 117. Subject matter combined with apparatus producing a qualitative
or quantitative output representative of a characteristic of the
modulator or its signals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||
119 | . Plural modulation: |
This subclass is indented under subclass 117. Subject matter having a plurality of modulators, modulating
signals, or diverse output modulation types simultaneously present
or individually selectable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||||||
120 | .. Including amplitude modulation: |
This subclass is indented under subclass 119. Subject matter in which at least one modulator is an amplitude
modulator or in which amplitude modulation is produced in addition
to the frequency modulation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||
121 | ... Including electron discharge device: |
This subclass is indented under subclass 120. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
122 | .. Including electron discharge device: |
This subclass is indented under subclass 119. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
123 | . Including stabilization or alternatively distortion, noise or other interference prevention, reduction, or compensation: |
This subclass is indented under subclass 117. Subject matter including the neutralization of an undesirable
characteristic of a frequency modulator or its signals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||
124 | .. Nonlinearity reduction or compensation: |
This subclass is indented under subclass 123. Subject matter which diminishes the undesired effects of a modulator element or circuit whose output is not directly proportional to its input. | |
125 | .. Automatic amplitude stabilization or control: |
This subclass is indented under subclass 123. Subject matter where undesired signal amplitude variations
are controlled without human intervention.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||
126 | .. Automatic frequency stabilization or control: |
This subclass is indented under subclass 123. Subject matter in which undesired signal frequency variations
are controlled without human intervention.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||
127 | ... Phase or frequency locked loop: |
This subclass is indented under subclass 126. Subject matter in which a stable frequency is attained by utilizing a phase or frequency locked loop. | |
128 | .... Modulating signal applied to plural elements of the loop: |
This subclass is indented under subclass 127. Subject matter in which the modulating signal is injected into a plurality of points within the locked loop. | |
129 | . Including microwave or distributed parameter structure: |
This subclass is indented under subclass 117. Subject matter utilizing a structure or device which is
peculiar to microwave frequencies or which has resistance, inductance
or capacitance not concentrated in lumped circuit elements.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||
130 | .. With discrete semiconductor device: |
This subclass is indented under subclass 129. Subject matter containing an electrical device whose constituent
portions are constructed from solid material having room temperature conductivity
between that of a conductor and an insulator and which conductivity
is typically modified through the addition of small amounts of dopant.
| |||
131 | .. With electron discharge device: |
This subclass is indented under subclass 129. Subject matter combined with a device which has electrical
current flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
132 | ... Magnetron type: |
This subclass is indented under subclass 131. Subject matter in which an electron beam within the discharge
device is subject to a magnetic field.
SEE OR SEARCH CLASS:
| |||||
133 | ... Klystron type: |
This subclass is indented under subclass 131. Subject matter where the discharge device includes structure
to vary the relative velocity of different longitudinal portions
of the electron beam resulting in electron bunching.
SEE OR SEARCH CLASS:
| |||||
134 | ... Travelling wave type: |
This subclass is indented under subclass 131. Subject matter wherein the discharge device has structure
to slow a travelling electromagnetic wave to more closely match
the velocity of an electron beam with which it is interacting.
SEE OR SEARCH CLASS:
| |||||
135 | . Including discrete semiconductor device: |
This subclass is indented under subclass 117. Subject matter containing an electrical device whose constituent
portions are constructed from solid material having room temperature conductivity
between that of a conductor and an insulator and which conductivity
is typically modified through the addition of small amounts of dopant.
| |||
136 | .. With varactor: |
This subclass is indented under subclass 135. Subject matter in combination with a variable capacitance
diode.
SEE OR SEARCH CLASS:
| |||
137 | . Including electron discharge device: |
This subclass is indented under subclass 117. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
138 | .. Particular oscillator circuit: |
This subclass is indented under subclass 137. Subject matter including details of an associated frequency
source.
SEE OR SEARCH CLASS:
| |||||
139 | ... Crystal oscillator type: |
This subclass is indented under subclass 138. Subject matter in which frequency generation is controlled
by a crystal resonator such as a piezoelectric crystal.
SEE OR SEARCH CLASS:
| |||
140 | .... With separate modulator tube (e.g., reactance tube): |
This subclass is indented under subclass 139. Subject matter where an electron discharge device distinct from the crystal oscillator performs the actual modulation. | |
141 | ... L-C oscillator type: |
This subclass is indented under subclass 138. Subject matter in which frequency generation is accomplished by an inductive-capacitive network. | |
142 | .... With separate modulator tube (e.g., reactance tube): |
This subclass is indented under subclass 141. Subject matter where an electron discharge device distinct from the L-C oscillator performs the actual modulation. | |
143 | ..... Plural modulator tubes: |
This subclass is indented under subclass 142. Subject matter having a plurality of such distinct modulator tubes. | |
144 | PHASE MODULATOR: |
This subclass is indented under the class definition. Subject matter in which the phase of the carrier is varied
over a continuum of values in accordance with the modulating signal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||
145 | . Including amplitude modulator: |
This subclass is indented under subclass 144. Subject matter in which at least one modulator is an amplitude
modulator or in which amplitude modulation is produced in addition
to phase modulation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||
146 | . Including discrete semiconductor device: |
This subclass is indented under subclass 144. Subject matter containing an electrical device whose constituent
portions are constructed from solid material having room temperature conductivity
between that of a conductor and an insulator and which conductivity
is typically modified through the addition of small amounts of dopant.
| |||
147 | . Including electron discharge device: |
This subclass is indented under subclass 144. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
148 | .. Push-pull circuit: |
This subclass is indented under subclass 147. Subject matter wherein there are two electrical paths with common output each of which contains an electron discharge device and in which the respective voltages are 180o out of phase with respect to the other. | |
149 | AMPLITUDE MODULATOR: |
This subclass is indented under the class definition. Subject matter in which the amplitude of the carrier is
varied over a continuum of values in accordance with the modulating
signal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||||
150 | . Including measuring or indicating: |
This subclass is indented under subclass 149. Subject matter combined with apparatus producing a qualitative
or quantitative output representative of a characteristic of the
modulator or its signals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||
151 | . Plural modulation: |
This subclass is indented under subclass 149. Subject matter having a plurality of modulators, modulating
signals, or diverse output modulation types simultaneously present
or individually selectable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||||||
152 | .. Including discrete semiconductor device: |
This subclass is indented under subclass 151. Subject matter containing an electrical device whose constituent
portions are constructed from solid material having room temperature conductivity
between that of a conductor and an insulator and which conductivity
is typically modified through the addition of small amounts of dopant.
| |||
153 | .. Including electron discharge device: |
This subclass is indented under subclass 151. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
154 | ... Push-pull circuit: |
This subclass is indented under subclass 153. Subject matter wherein there are two electrical paths with common output each of which contains an electron discharge device and in which the respective voltages are 180 degrees out of phase with respect to the other. | |
155 | . Percent modulation control or automatic amplitude control of carrier or modulating signal: |
This subclass is indented under subclass 149. Subject matter in which amplitude control is exerted on
the carrier, the modulating signal, or the ratio therebetween without
human intervention.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||
156 | .. Overmodulation prevention: |
This subclass is indented under subclass 155. Subject matter in which the automatic amplitude control maintains the ratio of the modulating signal amplitude to the carrier signal amplitude at a value of one or less. | |
157 | .. Average carrier amplitude controlled by modulating signal: |
This subclass is indented under subclass 155. Subject matter in which the average unmodulated carrier amplitude is adjusted to reflect the average modulating signal amplitude. | |
158 | .. Carrier output suppressed during absence of modulating signal: |
This subclass is indented under subclass 155. Subject matter in which the automatic control eliminates
the carrier in response to a lack of modulating signal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||
159 | . Including stabilization or alternatively distortion, noise or other interference prevention, reduction or compensation: |
This subclass is indented under subclass 149. Subject matter including the neutralization of an undesirable
characteristic of an amplitude modulator or its signals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||||
160 | .. Reduction or compensation of nonlinearity in modulation characteristic: |
This subclass is indented under subclass 159. Subject matter which diminishes the undesired effects of a modulator element or circuit whose output is not directly proportional to its input. | |
161 | .. Reduction of carrier phase or frequency variations or modulation: |
This subclass is indented under subclass 159. Subject matter in which undesired fluctuations of either
the phase or frequency of the carrier are reduced.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||
162 | .. Using feedback to reduce distortion, noise or other interference: |
This subclass is indented under subclass 159. Subject matter in which a feedback signal is used to remove or control distortion. | |
163 | . Including microwave or distributed parameter structure: |
This subclass is indented under subclass 149. Subject matter utilizing a structure or device which is
peculiar to microwave frequencies or which has resistance, inductance
or capacitance not concentrated in lumped circuit elements.
SEE OR SEARCH THIS CLASS, SUBCLASS:
| |||
164 | .. With discrete semiconductor device: |
This subclass is indented under subclass 163. Subject matter containing an electrical device whose constituent
portions are constructed from solid material having room temperature conductivity
between that of a conductor and an insulator and which conductivity
is typically modified through the addition of small amounts of dopant.
| |||
165 | .. With electron discharge device: |
This subclass is indented under subclass 163. Subject matter combined with a device which has electrical
current flow between two spaced electrodes in a gas, vapor, or vacuum.
| |||||
166 | ... Magnetron type: |
This subclass is indented under subclass 165. Subject matter in which an electron beam within the discharge
device is subject to a magnetic field.
SEE OR SEARCH CLASS:
| |||||
167 | . Suppressed carrier double sideband type: |
This subclass is indented under subclass 149. Subject matter in which the carrier is suppressed continuously
or intermittently and both sidebands are intact.
SEE OR SEARCH CLASS:
| |||
168 | .. Including discrete semiconductor device: |
This subclass is indented under subclass 167. Subject matter containing an electrical device whose constituent
portions are constructed from solid material having room temperature conductivity
between that of a conductor and an insulator and which conductivity
is typically modified through the addition of small amounts dopant.
| |||
169 | .. Including electron discharge device: |
This subclass is indented under subclass 167. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
170 | . Single or vestigial sideband type: |
This subclass is indented under subclass 149. Subject matter in which the final output contains less than
two complete sidebands with or without the carrier.
SEE OR SEARCH CLASS:
| |||
171 | .. Including electron discharge device: |
This subclass is indented under subclass 170. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
172 | . Modulating signal applied to a bridge circuit: |
This subclass is indented under subclass 149. Subject matter in which the carrier is applied to an impedance bridge in which the impedance of at least one branch is varied in accordance with the modulating signal. | |
173 | . Magnetic field varied by modulating signal: |
This subclass is indented under subclass 149. Subject matter in which the amplitude of the carrier is
varied by varying a magnetic field in accordance with the modulating
signal.
| |||
174 | . Resistive or dissipative device controlled by modulating signal (e.g., loss modulator): |
This subclass is indented under subclass 149. Subject matter in which the energy of the carrier is variably
absorbed, diverted or scattered in accordance with the modulating
signal.
SEE OR SEARCH CLASS:
| |||
175 | . Variable reactance controlled by modulating signal: |
This subclass is indented under subclass 149. Subject matter in which the amplitude of the carrier is
varied by varying a reactance in accordance with the modulating
signal.
| |||
176 | . Nonlinear device controlled by modulating signal: |
This subclass is indented under subclass 149. Subject matter which includes a circuit element having an
impedance which is not directly proportional to the current passing
through it or the voltage applied to it and which controls the amplitude
of the carrier in accordance with the modulating signal.
| |||
177 | .. Nonlinear discrete semiconductor device: |
This subclass is indented under subclass 176. Subject matter in which the controlled circuit element is an electrical device whose constituent portions are constructed from solid material having room temperature conductivity between that of a conductor and an insulator and which conductivity is typically modified through the addition of small amounts of dopant. | |
178 | . Including discrete semiconductor device: |
This subclass is indented under subclass 149. Subject matter containing an electrical device whose constituent
portions are constructed from solid material having room temperature conductivity
between that of a conductor and an insulator and which conductivity
is typically modified through the addition of small amounts of dopant.
| |||
179 | . Including electron discharge device: |
This subclass is indented under subclass 149. Subject matter utilizing a device which has electrical current
flow between two spaced electrodes in a gas, vapor or vacuum.
| |||||
180 | .. Push-pull circuit: |
This subclass is indented under subclass 179. Subject matter wherein there are two electrical paths with common output each of which contains an electron discharge device and in which the respective voltages are 180 degrees out of phase with respect to the other. | |
181 | .. Plate circuit modulation: |
This subclass is indented under subclass 179. Subject matter including an electronic tube which generates
or amplifies the carrier, and in which the modulating signal is
applied to the anode circuit of the tube or controls a circuit element
in the anode circuit.
| |||
182 | .. Grid circuit modulation: |
This subclass is indented under subclass 179. Subject matter including an electronic tube which generates or amplifies the carrier, and in which the modulating signal is applied to the grid circuit of the tube or controls a circuit element in the grid circuit. | |
183 | MODULATION CONVERTER HAVING PRE-MODULATED INPUT (E.G., FM TO AM): |
This subclass is indented under the class definition. Subject matter in which the input to a system is a repetitious
electrical wave which has had a characteristic varied in accordance with
a modulating signal, and in which the output of the system is a
repetitious electrical wave having a different characteristic varied.
SEE OR SEARCH THIS CLASS, SUBCLASS:
SEE OR SEARCH CLASS:
| |||||||||
184 | . Between diverse pulse modulation types: |
This subclass is indented under subclass 183. Subject matter in which conversion occurs between diverse
types of pulse modulation.
| |||
185 | MISCELLANEOUS: |
This subclass is indented under the class definition. Subject matter not provided for in any of the preceding subclasses. | |
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
This subclass has no definition. | |