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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER ; GENERATION OF NOISE BY SUCH CIRCUITS ( measuring, testing G01R ; generators adapted for electrophonic musical instruments G10H ; Speech synthesis G10L ; masers, lasers H01S ; dynamo-electric machines H02K ; power inverter circuits H02M ; by using pulse techniques H03K ; automatic control of generators H03L ; starting, synchronisation or stabilisation of generators where the type of generator is irrelevant or unspecified H03L ; generation of oscillations in plasma H05H )
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Details
.
Structural details of power oscillators, e.g. for heating
{
( construction of transmitters H04B ; features of generators for heating by electromagnetic fields H05B 6/00 )
}
H03B 1/04
.
Reducing undesired oscillations, e.g. harmonics
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Generation of oscillations using amplifier with regenerative feedback from output to input ( H03B 9/00 , H03B 15/00 take precedence )
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H03B 5/02
.
Details
. .
Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
H03B 5/06
. .
Modifications of generator to ensure starting of oscillations
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H03B 5/08
.
with frequency-determining element comprising lumped inductance and capacitance
. .
active element in amplifier being vacuum tube ( H03B 5/14 takes precedence )
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. .
active element in amplifier being semiconductor device ( H03B 5/14 takes precedence )
WARNING
-
Subgroups H03B 5/1203 to H03B 5/1296 are incomplete pending reclassification; see also the other subgroups of H03B 5/12

. . .
{
the amplifier being a single transistor
}
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. . .
{
using multiple transistors for amplification
}
. . . .
{
the amplifier having two current paths operating in a differential manner and a current source or degeneration circuit in common to both paths e.g. a long-tailed pair. ( H03B 5/1215 takes precedence )
}
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. . . .
{
the amplifier comprising a pair of transistors, wherein an output terminal of each being connected to an input terminal of the other, e.g. a cross coupled pair
}
. . . . .
{
the current source or degeneration circuit being in common to both transistors of the pair, e.g. a cross-coupled long-tailed pair
}
. . . .
{
the generator being of the balanced type
}
. . . .
{
the amplifier comprising multiple amplification stages connected in cascade
}
. . . .
{
the generator comprising multiple amplifiers connected in parallel
}
. . .
{
the amplifier comprising one or more field effect transistors
}
. . .
{
the amplifier comprising one or more bipolar transistors
}
. . .
{
and comprising means for varying the output amplitude of the generator ( H03B 5/1278 takes precedence )
}
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. . .
{
comprising means for varying the frequency of the generator
}
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H03B 5/124
. . . .
{
the means comprising a voltage dependent capacitance
}
H03B 5/1243
. . . . .
{
the means comprising voltage variable capacitance diodes
}
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H03B 5/1246
. . . . .
{
the means comprising transistors used to provide a variable capacitance
}
H03B 5/125
. . . . . .
{
the transistors being bipolar transistors
}
H03B 5/1253
. . . . . .
{
the transistors being field-effect transistors
}
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H03B 5/1256
. . . .
{
the means comprising a variable inductance
}
H03B 5/1259
. . . . .
{
the means comprising a variable active inductor e.g. gyrator circuits
}
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H03B 5/1262
. . . .
{
the means comprising switched elements
}
H03B 5/1265
. . . . .
{
switched capacitors
}
H03B 5/1268
. . . . .
{
switched inductors
}
. . . .
{
the frequency being controlled by a control current i.e. current controlled oscillators
}
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. . . .
{
having further means for varying a parameter in dependence on the frequency
}
H03B 5/1278
. . . . .
{
the parameter being an amplitude of a signal, e.g. maintaining a constant output amplitude over the frequency range
}
H03B 5/1281
. . . . .
{
the parameter being the amount of feedback
}
H03B 5/1284
. . . . .
{
the parameter being another frequency, e.g. a harmonic of the oscillating frequency
}
H03B 5/1287
. . . . .
{
the parameter being a quality factor, e.g. Q factor of the frequency determining element
}
H03B 5/129
. . . . .
{
the parameter being a bias voltage or a power supply
}
. . . .
{
having means for achieving a desired tuning characteristic e.g. linearising the frequency characteristic across the tuning voltage range
}
. . .
{
the feedback circuit comprising a transformer
}
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H03B 5/14
. .
frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted
H03B 5/16
. . .
active element in amplifier being vacuum tube
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H03B 5/18
.
with frequency-determining element comprising distributed inductance and capacitance
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H03B 5/1805
. .
{
the frequency-determining element being a coaxial resonator
}
. . .
{
the active element in the amplifier being a vacuum tube ( see provisionally also H03B 5/1835 )
}
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. .
{
the frequency-determining element being a cavity resonator
}
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H03B 5/1823
. . .
{
the active element in the amplifier being a semiconductor device
}
H03B 5/1829
. . . .
{
the semiconductor device being a field-effect device
}
H03B 5/1835
. . .
{
the active element in the amplifier being a vacuum tube
}
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. .
{
the frequency-determining element being a strip line resonator ( H03B 5/1805 , H03B 5/1817 , H03B 5/1864 and H03B 5/1882 take precedence )
}
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. . .
{
the active element in the amplifier being a semiconductor device
}
. . . .
{
the semiconductor device being a field-effect device
}
H03B 5/1858
. . .
{
the active element in the amplifier being a vacuum tube ( see provisionally also H03B 5/1835 )
}
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H03B 5/1864
. .
{
the frequency-determining element being a dielectric resonator
}
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H03B 5/187
. . .
{
the active element in the amplifier being a semiconductor device
}
H03B 5/1876
. . . .
{
the semiconductor device being a field-effect device
}
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H03B 5/1882
. .
{
the frequency-determining element being a magnetic-field sensitive resonator, e.g. a Yttrium Iron Garnet or a magnetostatic surface wave resonator
}
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H03B 5/1888
. . .
{
the active element in the amplifier being a semiconductor device
}
H03B 5/1894
. . . .
{
the semiconductor device being a field-effect device
}
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H03B 5/20
.
with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
. .
active element in amplifier being vacuum tube ( H03B 5/26 takes precedence )
. .
active element in amplifier being semiconductor device ( H03B 5/26 takes precedence )
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. .
frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted ; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator
H03B 5/28
. . .
active element in amplifier being vacuum tube
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H03B 5/30
.
with frequency-determining element being electromechanical resonator
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. .
being a piezo-electric resonator ( selection of piezo-electric material H01L 41/00 )
. . .
{
the resonator having more than two terminals ( H03B 5/326 takes precedence )
}
H03B 5/326
. . .
{
the resonator being an acoustic wave device, e.g. SAW or BAW device
}
. . .
active element in amplifier being vacuum tube ( H03B 5/38 takes precedence )
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. . .
active element in amplifier being semiconductor device (
{
H03B 5/323 , H03B 5/326
}
, H03B 5/38 take precedence )
. . . .
{
the amplifier being a single transistor ( H03B 5/364 to H03B 5/368 take precedence )
}
. . . .
{
the amplifier comprising field effect transistors ( H03B 5/366 takes precedence )
}
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H03B 5/366
. . . .
{
and comprising means for varying the frequency by a variable voltage or current
}
. . . . .
{
the means being voltage variable capacitance diodes
}
H03B 5/38
. . .
frequency-determining element being connected via bridge circuit to closed ring around which signal is transmitted
. .
being a magnetostrictive resonator ( H03B 5/42 takes precedence; selection of magneto-strictive material
{
H01F 1/00
}
; H01L 41/00 )
H03B 5/42
. .
frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted
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Generation of oscillations using active element having a negative resistance between two of its electrodes ( H03B 9/00 takes precedence )
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H03B 7/02
.
with frequency-determining element comprising lumped inductance and capacitance
H03B 7/04
. .
active element being vacuum tube
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. .
active element being semiconductor device
. . .
being a tunnel diode
H03B 7/10
. .
active element being gas-discharge or arc-discharge tube
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H03B 7/12
.
with frequency-determining element comprising distributed inductance and capacitance
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. .
active element being semiconductor device
H03B 7/143
. . .
{
and which comprises an element depending on a voltage or a magnetic field, e.g. varactor- YIG
}
H03B 7/146
. . .
{
with several semiconductor devices
}
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Generation of oscillations using transit-time effects
{
( construction of tube and circuit arrangements not adapted to a particular application H01J ; construction of the semiconductor devices H01L )
}
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H03B 9/01
.
using discharge tubes
. .
using a retarding-field tube ( using klystrons H03B 9/04 )
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H03B 9/04
. .
using a klystron
H03B 9/06
. . .
using a reflex klystron
H03B 9/08
. .
using a travelling-wave tube
H03B 9/10
. .
using a magnetron
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.
using solid state devices, e.g. Gunn-effect devices
H03B 2009/123
. .
{
using Gunn diodes
}
H03B 2009/126
. .
{
using impact ionization avalanche transit time (IMPATT) diodes
}
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H03B 9/14
. .
and elements comprising distributed inductance and capacitance
H03B 9/141
. . .
{
and comprising a voltage sensitive element, e.g. varactor
}
H03B 9/142
. . .
{
and comprising a magnetic field sensitive element, e.g. YIG
}
H03B 9/143
. . .
{
using more than one solid state device
}
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. . .
{
the frequency being determined by a cavity resonator, e.g. a hollow waveguide cavity or a coaxial cavity ( H03B 9/141 to H03B 9/143 , H03B 9/147 , H03B 9/148 take precedence )
}
H03B 9/146
. . . .
{
formed by a disc, e.g. a waveguide cap resonator
}
. . .
{
the frequency being determined by a stripline resonator ( H03B 9/141 to H03B 9/143 , H03B 9/148 take precedence )
}
. . .
{
the frequency being determined by a dielectric resonator ( H03B 9/141 to H03B 9/143 take precedence )
}
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Generation of oscillations using a shock-excited tuned circuit ( with feedback H03B 5/00 )
.
excited by spark ( spark gaps therefor H01T 9/00 )
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H03B 11/04
.
excited by interrupter
H03B 11/06
. .
by mechanical interrupter
H03B 11/08
. .
interrupter being discharge tube
H03B 11/10
. .
interrupter being semiconductor device
Generation of oscillations using deflection of electron beam in a cathode-ray tube
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Generation of oscillations using galvano-magnetic devices, e.g. Hall-effect devices, or using super-conductivity effects ( galvano-magnetic devices per se H01L 43/00 )
H03B 15/003
.
{
using superconductivity effects ( devices using superconductivity H01L 39/00 )
}
H03B 15/006
.
{
using spin transfer effects or giant magnetoresistance
}
Generation of oscillations using radiation source and detector, e.g. with interposed variable obturator
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Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source ( transference of modulation from one carrier to another H03D 7/00 )
H03B 19/03
.
using non-linear inductance
H03B 19/05
.
using non-linear capacitance, e.g. varactor diodes
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H03B 19/06
.
by means of discharge device or semiconductor device with more than two electrodes
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H03B 19/08
. .
by means of a discharge device
H03B 19/10
. . .
using multiplication only
H03B 19/12
. . .
using division only
H03B 19/14
. .
by means of a semiconductor device
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H03B 19/16
.
using uncontrolled rectifying devices, e.g. rectifying diodes or Schottky diodes
H03B 19/18
. .
and elements comprising distributed inductance and capacitance
H03B 19/20
. .
being diodes exhibiting charge storage or enhancement effects
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Generation of oscillations by combining unmodulated signals of different frequencies ( H03B 19/00 takes precedence; frequency changing circuits in general H03D )
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.
by beating unmodulated signals of different frequencies
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. .
by plural beating, i.e. for frequency synthesis;
{
Beating in combination with multiplication or division of frequency ( digital frequency synthesis using a ROM G06F 1/02 ; digital frequency synthesis in general H03K ; indirect frequency synthesis using a PLL H03L 7/16 )
}
H03B 21/025
. . .
{
by repeated mixing in combination with division of frequency only
}
H03B 21/04
. .
using several similar stages
Generation of oscillations periodically swept over a predetermined frequency range ( angle-modulating circuits in general H03C 3/00 )
Simultaneous generation by a free-running oscillator of oscillations having different frequencies
Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs
Generation of oscillations by methods not covered by groups H03B 5/00 to H03B 27/00 , including modification of the waveform to produce sinusoidal oscillations ( analogue function generators for performing computing operations G06G 7/26 ; use of transformers for conversion of waveform in ac-ac converters H02M 5/18 )
Generation of noise currents and voltages
{
( gasfilled discharge tubes with solid cathode specially adapted as noise generators H01J 17/005 )
}
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Indexing scheme relating to details of oscillators covered by H03B
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H03B 2200/0002
.
Types of oscillators
H03B 2200/0004
. .
Butler oscillator
H03B 2200/0006
. .
Clapp oscillator
H03B 2200/0008
. .
Colpitts oscillator
H03B 2200/001
. .
Hartley oscillator
H03B 2200/0012
. .
Pierce oscillator
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H03B 2200/0014
.
Structural aspects of oscillators
H03B 2200/0016
. .
including a ring, disk or loop shaped resonator
H03B 2200/0018
. .
relating to the cutting angle of a crystal, e.g. AT cut quartz
H03B 2200/002
. .
making use of ceramic material
H03B 2200/0022
. .
characterised by the substrate, e.g. material
H03B 2200/0024
. .
including parallel striplines
H03B 2200/0026
. .
relating to the pins of integrated circuits
H03B 2200/0028
. .
based on a monolithic microwave integrated circuit (MMIC)
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H03B 2200/003
.
Circuit elements of oscillators
H03B 2200/0032
. .
including a device with a Schottky junction
H03B 2200/0034
. .
including a buffer amplifier
H03B 2200/0036
. .
including an emitter or source coupled transistor pair or a long tail pair
H03B 2200/0038
. .
including a current mirror
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H03B 2200/004
. .
including a variable capacitance, e.g. a varicap, a varactor or a variable capacitance of a diode or transistor
H03B 2200/0042
. . .
the capacitance diode being in the feedback path
H03B 2200/0044
. .
including optical elements e.g. optical injection locking
H03B 2200/0046
. .
including measures to switch the gain of an amplifier
H03B 2200/0048
. .
including measures to switch the frequency band, e.g. by harmonic selection
H03B 2200/005
. .
including measures to switch a capacitor
H03B 2200/0052
. .
including measures to switch the feedback circuit
H03B 2200/0054
. .
including measures to switch a filter, e.g. for frequency tuning or for harmonic selection
H03B 2200/0056
. .
including a diode used for switching
H03B 2200/0058
. .
with particular transconductance characteristics, e.g. an operational transconductance amplifier
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H03B 2200/006
.
Functional aspects of oscillators
H03B 2200/0062
. .
Bias and operating point
H03B 2200/0064
. .
Pulse width, duty cycle or on/off ratio
H03B 2200/0066
. .
Amplitude or AM detection
H03B 2200/0068
. .
Frequency or FM detection
H03B 2200/007
. .
Generation of oscillations based on harmonic frequencies, e.g. overtone oscillators
H03B 2200/0072
. .
Frequency hopping and enabling of rapid frequency changes
H03B 2200/0074
. .
Locking of an oscillator by injecting an input signal directly into the oscillator
H03B 2200/0076
. .
Power combination of several oscillators oscillating at the same frequency
H03B 2200/0078
. .
generating or using signals in quadrature
H03B 2200/008
. .
making use of a reference frequency
H03B 2200/0082
. .
Lowering the supply voltage and saving power
H03B 2200/0084
. .
dedicated to Terahertz frequencies
H03B 2200/0086
. .
relating to the Q factor or damping of the resonant circuit
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H03B 2200/0088
. .
Reduction of noise
H03B 2200/009
. . .
Reduction of phase noise
H03B 2200/0092
. .
Measures to linearise or reduce distortion of oscillator characteristics
. .
Measures to ensure starting of oscillations
H03B 2200/0096
. .
Measures to ensure stopping of oscillations
H03B 2200/0098
. .
having a balanced output signal
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H03B 2201/00
Aspects of oscillators relating to varying the frequency of the oscillations
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H03B 2201/01
.
Varying the frequency of the oscillations by manual means
H03B 2201/011
. .
the means being an element with a variable capacitance
H03B 2201/012
. .
the means being an element with a variable inductance
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H03B 2201/014
. .
the means being associated with an element comprising distributed inductances and capacitances
H03B 2201/015
. . .
the element being a cavity
H03B 2201/017
. . .
the element being a dielectric resonator
H03B 2201/018
. .
the means being a manual switch
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H03B 2201/02
.
Varying the frequency of the oscillations by electronic means
H03B 2201/0208
. .
the means being an element with a variable capacitance, e.g. capacitance diode
H03B 2201/0216
. .
the means being an element with a variable inductance
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H03B 2201/0225
. .
the means being associated with an element comprising distributed inductances and capacitances
H03B 2201/0233
. . .
the element being a cavity
H03B 2201/0241
. . .
the element being a magnetically variable element, e.g. an Yttrium Iron Garnet
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H03B 2201/025
. .
the means being an electronic switch for switching in or out oscillator elements
H03B 2201/0258
. . .
the means comprising a diode
H03B 2201/0266
. . .
the means comprising a transistor
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H03B 2201/0275
. .
the means delivering several selected voltages or currents
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H03B 2201/0283
. . .
the means functioning digitally
H03B 2201/0291
. . . .
and being controlled by a processing device, e.g. a microprocessor
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H03B 2201/03
.
Varying beside the frequency also another parameter of the oscillator in dependence on the frequency
H03B 2201/031
. .
the parameter being the amplitude of a signal, e.g. maintaining a constant output amplitude over the frequency range
H03B 2201/033
. .
the parameter being the amount of feedback
H03B 2201/035
. .
the parameter being another frequency, e.g. a harmonic of the oscillating frequency
H03B 2201/036
. .
the parameter being the quality factor of a resonator
H03B 2201/038
. .
the parameter being a bias voltage or a power supply
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H03B 2202/00
Aspects of oscillators relating to reduction of undesired oscillations
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H03B 2202/01
.
Reduction of undesired oscillations originated from distortion in one of the circuit elements of the oscillator
H03B 2202/012
. .
the circuit element being the active device
H03B 2202/015
. .
the circuit element being a limiter
H03B 2202/017
. .
the circuit element being a frequency determining element
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H03B 2202/02
.
Reduction of undesired oscillations originated from natural noise of the circuit elements of the oscillator
H03B 2202/022
. .
the noise being essentially white noise, i.e. frequency independent noise
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H03B 2202/025
. .
the noise being coloured noise, i.e. frequency dependent noise
H03B 2202/027
. . .
the noise being essentially proportional to the inverse of the frequency, i.e. the so-called 1/f noise
H03B 2202/03
.
Reduction of undesired oscillations originated from internal parasitic couplings, i.e. parasitic couplings within the oscillator itself
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H03B 2202/04
.
Reduction of undesired oscillations originated from outside noise or interferences, e.g. from parasitic couplings with circuit elements outside the oscillator
H03B 2202/042
. .
the circuit element belonging to the power supply
H03B 2202/044
. .
the circuit element belonging to transmitter circuitry
H03B 2202/046
. .
the circuit element belonging to receiver circuitry
H03B 2202/048
. .
the circuit element being a frequency divider
H03B 2202/05
.
Reduction of undesired oscillations through filtering or through special resonator characteristics
H03B 2202/06
.
Reduction of undesired oscillations through modification of a bias voltage, e.g. selecting the operation point of an active device
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H03B 2202/07
.
Reduction of undesired oscillations through a cancelling of the undesired oscillation
H03B 2202/073
. .
by modifying the internal feedback of the oscillator
H03B 2202/076
. .
by using a feedback loop external to the oscillator, e.g. the so-called noise degeneration
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H03B 2202/08
.
Reduction of undesired oscillations originated from the oscillator in circuit elements external to the oscillator by means associated with the oscillator
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H03B 2202/082
. .
by avoiding coupling between these circuit elements
H03B 2202/084
. . .
through shielding
H03B 2202/086
. . .
through a frequency dependent coupling, e.g. which attenuates a certain frequency range
H03B 2202/088
. .
by compensating through additional couplings with these circuit elements
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013