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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)
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]
H03K 3/00
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Circuits for generating electric pulsesMonostable, bistable or multistable circuits (H03K 4/00 takes precedence; for digital function generators in computers G06F 1/02) [1, 5, 2006.01]
H03K 4/00
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Generating pulses having essentially a finite slope or stepped portions [1, 2006.01]
H03K 5/00
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Manipulation of pulses not covered by one of the other main groups of this subclass (circuits with regenerative action H03K 3/00, H03K 4/00; by the use of non-linear magnetic or dielectric devices H03K 3/45) [1, 2006.01]
H03K 6/00
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Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass (circuits with regenerative action H03K 4/00) [1, 2006.01]
H03K 7/00
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Modulating pulses with a continuously-variable modulating signal [1, 2006.01]
H03K 9/00
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Demodulating pulses which have been modulated with a continuously-variable signal [1, 2006.01]
H03K 11/00
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Transforming types of modulation, e.g. position-modulated pulses into duration-modulated pulses [1, 2006.01]
H03K 12/00
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Producing pulses by distorting or combining sinusoidal waveforms (shaping pulses H03K 5/01; combining sinewaves using elements operating in a non-switching manner H03B 21/00) [3, 2006.01]
H03K 17/00
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Electronic switching or gating, i.e. not by contact-making and -breaking (gated amplifiers H03F 3/72; switching arrangements for exchange systems using static devices H04Q 3/52) [1, 2006.01]
H03K 19/00
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Logic circuits, i.e. having at least two inputs acting on one output (circuits for computer systems using fuzzy logic G06N 7/02)Inverting circuits [1, 2006.01]
H03K 21/00
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Details of pulse counters or frequency dividers [1, 2006.01]
H03K 23/00
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Pulse counters comprising counting chainsFrequency dividers comprising counting chains (H03K 29/00 takes precedence) [1, 2006.01]
H03K 25/00
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Pulse counters with step-by-step integration and static storageAnalogous frequency dividers [1, 2006.01]
H03K 27/00
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Pulse counters in which pulses are continuously circulated in a closed loopAnalogous frequency dividers (feedback shift register counters H03K 23/54) [1, 4, 2006.01]
H03K 29/00
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Pulse counters comprising multi-stable elements, e.g. for ternary scale, for decimal scaleAnalogous frequency dividers [1, 2006.01]
H03K 29/04
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using multi-cathode gas discharge tubes [4, 2006.01]
H03K 29/06
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using beam-type tubes, e.g. magnetrons, cathode-ray tubes [4, 2006.01]
H03K 99/00
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Subject matter not provided for in other groups of this subclass [2013.01]
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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