| IPC 7 English version |
| H03-H03B02900 |
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| SECTION H – ELECTRICITY |
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| H 03 | BASIC ELECTRONIC CIRCUITRY |
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| H 03 B | 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 13/00; 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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| Subclass Index |
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| GENERATION WITHOUT FREQUENCY-CHANGING |
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| By means of amplification and feedback; negative resistance |
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| By means of transit-time tubes; electron-beam tubes |
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| By shock-exciting; Hall effect; radiation source and detectors |
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| GENERATION WITH FREQUENCY- CHANGING |
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| By multiplication or division of a signal |
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| By combining unmodulated signals |
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| PARTICULARITIES OF GENERATED OSCILLATIONS |
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| Swept-over frequency range; multi-frequency; multiphase; noise |
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| OTHER METHODS OF GENERATION |
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| DETAILS |
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1/ | 00 | Details |
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1/ | 02 | . | Structural details of power oscillators, e.g. for heating |
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1/ | 04 | . | Reducing undesired oscillations, e.g. harmonics |
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5/ | 00 | Generation of oscillations using amplifier with regenerative feedback from output to input (H03B 9/00, H03B 15/00 take precedence) |
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5/ | 02 | . | Details |
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5/ | 04 | . | . | Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature |
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5/ | 06 | . | . | Modifications of generator to ensure starting of oscillations |
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5/ | 08 | . | with frequency-determining element comprising lumped inductance and capacitance |
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5/ | 10 | . | . | active element in amplifier being vacuum tube (H03B 5/14 takes precedence) |
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5/ | 12 | . | . | active element in amplifier being semiconductor device (H03B 5/14 takes precedence) |
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5/ | 14 | . | . | frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted |
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5/ | 16 | . | . | . | active element in amplifier being vacuum tube |
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5/ | 18 | . | with frequency-determining element comprising distributed inductance and capacitance |
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5/ | 20 | . | with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator |
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5/ | 22 | . | . | active element in amplifier being vacuum tube (H03B 5/26 takes precedence) |
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5/ | 24 | . | . | active element in amplifier being semiconductor device (H03B 5/26 takes precedence) |
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5/ | 26 | . | . | 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 |
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5/ | 28 | . | . | . | active element in amplifier being vacuum tube |
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5/ | 30 | . | with frequency-determining element being electromechanical resonator |
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5/ | 32 | . | . | being a piezo-electric resonator (piezo-electric elements in general H01L 41/00) |
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5/ | 34 | . | . | . | active element in amplifier being vacuum tube (H03B 5/38 takes precedence) |
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5/ | 36 | . | . | . | active element in amplifier being semiconductor device (H03B 5/38 takes precedence) |
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5/ | 38 | . | . | . | frequency-determining element being connected via bridge circuit to closed ring around which signal is transmitted |
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5/ | 40 | . | . | being a magnetostrictive resonator (H03B 5/42 takes precedence; magnetostrictive elements in general H01L 41/00) |
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5/ | 42 | . | . | frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted |
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7/ | 00 | Generation of oscillations using active element having a negative resistance between two of its electrodes (H03B 9/00 takes precedence) |
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7/ | 02 | . | with frequency-determining element comprising lumped inductance and capacitance |
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7/ | 04 | . | . | active element being vacuum tube |
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7/ | 06 | . | . | active element being semiconductor device |
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7/ | 08 | . | . | . | being a tunnel diode |
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7/ | 10 | . | . | active element being gas-discharge or arc-discharge tube |
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7/ | 12 | . | with frequency-determining element comprising distributed inductance and capacitance |
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7/ | 14 | . | . | active element being semiconductor device |
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9/ | 00 | Generation of oscillations using transit-time effects [2] |
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9/ | 01 | . | using discharge tubes [2] |
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9/ | 02 | . | . | using a retarding-field tube (using klystrons H03B 9/04) [2] |
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9/ | 04 | . | . | using a klystron [2] |
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9/ | 06 | . | . | . | using a reflex klystron [2] |
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9/ | 08 | . | . | using a travelling-wave tube [2] |
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9/ | 10 | . | . | using a magnetron [2] |
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9/ | 12 | . | using solid state devices, e.g. Gunn-effect devices [2] |
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9/ | 14 | . | . | and elements comprising distributed inductance and capacitance [3] |
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11/ | 00 | Generation of oscillations using a shock-excited tuned circuit (with feedback H03B 5/00) |
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11/ | 02 | . | excited by spark (spark gaps therefor H01T 9/00) |
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11/ | 04 | . | excited by interrupter |
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11/ | 06 | . | . | by mechanical interrupter |
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11/ | 08 | . | . | interrupter being discharge tube |
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11/ | 10 | . | . | interrupter being semiconductor device |
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13/ | 00 | Generation of oscillations using deflection of electron beam in a cathode-ray tube |
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15/ | 00 | 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) |
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17/ | 00 | Generation of oscillations using radiation source and detector, e.g. with interposed variable obturator |
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19/ | 00 | 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) |
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19/ | 03 | . | using non-linear inductance [3] |
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19/ | 05 | . | using non-linear capacitance, e.g. varactor diodes [3] |
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19/ | 06 | . | by means of discharge device or semiconductor device with more than two electrodes |
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19/ | 08 | . | . | by means of a discharge device |
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19/ | 10 | . | . | . | using multiplication only |
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19/ | 12 | . | . | . | using division only |
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19/ | 14 | . | . | by means of a semiconductor device |
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19/ | 16 | . | using uncontrolled rectifying devices, e.g. rectifying diodes or Schottky diodes [3] |
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19/ | 18 | . | . | and elements comprising distributed inductance and capacitance [3] |
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19/ | 20 | . | . | being diodes exhibiting charge storage or enhancement effects [3] |
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21/ | 00 | Generation of oscillations by combining unmodulated signals of different frequencies (H03B 19/00 takes precedence; frequency changing circuits in general H03D) [3] |
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21/ | 01 | . | by beating unmodulated signals of different frequencies [3] |
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21/ | 02 | . | . | by plural beating, i.e. for frequency synthesis [3] |
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21/ | 04 | . | . | using several similar stages [3] |
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23/ | 00 | Generation of oscillations periodically swept over a predetermined frequency range (angle-modulating circuits in general H03C 3/00) |
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25/ | 00 | Simultaneous generation by a free-running oscillator of oscillations having different frequencies |
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27/ | 00 | Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs |
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28/ | 00 | 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) [4] |
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29/ | 00 | Generation of noise currents and voltages |
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