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Symbol IPC-Stellen auswählen Titel
A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONSTRANSPORTING
C
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CHEMISTRYMETALLURGY
D
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TEXTILESPAPER
E
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FIXED CONSTRUCTIONS
F
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MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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PHYSICS
H
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ELECTRICITY
H01
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ELECTRIC ELEMENTS
H02
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GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H03
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ELECTRONIC CIRCUITRY
H03B
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GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNERGENERATION OF NOISE BY SUCH CIRCUITS (generators specially adapted for electrophonic musical instruments G10H; masers or lasers H01S;  generation of oscillations in plasma H05H)
H03B 1/00
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Details [1, 2006.01]
H03B 5/00
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Generation of oscillations using amplifier with regenerative feedback from output to input (H03B 9/00, H03B 15/00 take precedence) [1, 2006.01]
H03B 7/00
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Generation of oscillations using active element having a negative resistance between two of its electrodes (H03B 9/00 takes precedence) [1, 2006.01]
H03B 7/02
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with frequency-determining element comprising lumped inductance and capacitance [1, 2006.01]
H03B 7/04
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. . active element being vacuum tube [1, 2006.01]
H03B 7/06
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. . active element being semiconductor device [1, 2006.01]
H03B 7/08
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. . . being a tunnel diode [1, 2006.01]
H03B 7/10
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. . active element being gas-discharge or arc-discharge tube [1, 2006.01]
H03B 7/12
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with frequency-determining element comprising distributed inductance and capacitance [1, 2006.01]
H03B 7/14
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. . active element being semiconductor device [1, 2006.01]
H03B 9/00
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Generation of oscillations using transit-time effects [1, 2, 2006.01]
H03B 11/00
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Generation of oscillations using a shock-excited tuned circuit (with feedback H03B 5/00) [1, 2006.01]
H03B 13/00
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Generation of oscillations using deflection of electron beam in a cathode-ray tube [1, 2006.01]
H03B 15/00
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Generation of oscillations using galvano-magnetic devices, e.g. Hall-effect devices, devices using spin transfer effects, devices using giant magnetoresistance, or using super-conductivity effects [1, 2006.01]
H03B 17/00
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Generation of oscillations using a radiation source and a detector [1, 2006.01]
H03B 19/00
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Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source [1, 2006.01]
H03B 21/00
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Generation of oscillations by combining unmodulated signals of different frequencies (H03B 19/00 takes precedence) [1, 3, 2006.01]
H03B 23/00
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Generation of oscillations periodically swept over a predetermined frequency range [1, 2006.01]
H03B 25/00
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Simultaneous generation by a free-running oscillator of oscillations having different frequencies [1, 2006.01]
H03B 27/00
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Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs [1, 2006.01]
H03B 28/00
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Generation of oscillations by methods not covered by groups H03B 5/00-H03B 27/00, including modification of the waveform to produce sinusoidal oscillations (analogue function generators for performing computing operations G06G 7/26) [4, 2006.01]
H03B 29/00
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Generation of noise currents and voltages (gas-filled discharge tubes with solid cathode specially adapted as noise generators H01J 17/00) [1, 2006.01]
H03C
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MODULATION (masers or lasers H01S; coding, decoding or code conversion H03M)
H03D
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DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER (masers, lasers H01S; circuits capable of acting both as modulator and demodulator H03C, e.g. balanced modulators H03C 1/54; details applicable to both modulators and frequency-changers H03C; demodulating pulses which have been modulated with a continuously-variable signal H03K 9/00; transforming types of pulse modulation H03K 11/00; relay systems, e.g. repeater stations H04B 7/14; demodulators adapted for digitally modulated-carrier systems H04L 27/00; synchronous demodulators adapted for colour television H04N 9/66)
H03F
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AMPLIFIERS
H03G
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CONTROL OF AMPLIFICATION
H03H
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IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITSRESONATORS (measuring, testing G01R; arrangements for producing a reverberation or echo sound G10K 15/08; impedance networks or resonators consisting of distributed impedances, e.g. of the waveguide type, H01P; control of amplification, e.g. bandwidth control of amplifiers, H03G; tuning resonant circuits, e.g. tuning coupled resonant circuits, H03J; networks for modifying the frequency characteristics of communication systems H04B)
H03J
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TUNING RESONANT CIRCUITSSELECTING RESONANT CIRCUITS
H03K
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PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C;  transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D 3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) [4]
H03L
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AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES (generation of oscillations H03B) [3]
H03M
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CODING, DECODING OR CODE CONVERSION, IN GENERAL (using fluidic means F15C 4/00; optical analogue/digital converters G02F 7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C) [4]
H04
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ELECTRIC COMMUNICATION TECHNIQUE
H05
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ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H10
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SEMICONDUCTOR DEVICESELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR [2023.01]
H99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]

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