H03K 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 H03D3/04; 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)
Introduced: September 1968
Description
H03K covers electronic circuits and devices designed to generate, process, shape, or detect electrical pulses and pulse trains. This subclass encompasses oscillators, pulse generators, timing circuits, monostable and astable multivibrators, counters, and dividers that operate on discrete pulse signals rather than continuous waveforms. Applications include digital logic circuits, switching circuits, timing control systems, and pulse modulation techniques used in telecommunications, radar, and digital electronics. The classification excludes steady-state signal processing and continuous-wave techniques, which fall under other H03 subclasses.
Title
Titles differ between systems:
IPC: PULSE TECHNIQUE
CPC: 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 H03D3/04; 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)
Full Title
Full titles differ between systems:
PULSE TECHNIQUE
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 H03D3/04; 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)
Additional Content IPC
Glossary
‘continuously-variable’ modulating signal Analogue signals or signals that comprise a number of discrete levels, such as signals produced by counting circuits.
Limiting references
Measuring pulse characteristics Electric discharge tubes or discharge lamps; Gas filled tubes; Vacuum tubes Modulating sinusoidal oscillations with pulses Demodulation or transference of signals modulated on a sinusoidal carrier Discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation Automatic control, starting, synchronizing or stabilization of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified Coding, decoding or code conversion, in general Transmission of digital information; Modulated carrier systems , Semiconductor devices; Electric solid-state devices not otherwise provided for
Of 17 combined children, 16 exist in both systems.
1 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.
9 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H03K 11/00 Transforming types of modulations, e.g. position-modulated pulses into duration-modulated pulses IPC+CPC Available in IPC and CPC
- H03K 12/00 Producing pulses by distorting or combining sinusoidal waveforms (shaping pulses H03K5/01; combining sinewaves using elements operating in a non-switching manner H03B21/00) since 1980 IPC+CPC Available in IPC and CPC
- H03K 17/00 Electronic switching or gating, i.e. not by contact-making and –breaking (gated amplifiers H03F3/72; switching arrangements for exchange systems using static devices H04Q3/52) +1 CPC IPC+CPC Available in IPC and CPC
- H03K 19/00 Logic circuits, i.e. having at least two inputs acting on one output (circuits for computer systems using fuzzy logic G06N7/02); Inverting circuits +4 CPC IPC+CPC Available in IPC and CPC
- H03K 2217/00 Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 2nd only +11 CPC CPC only CPC only
- H03K 23/00 Pulse counters comprising counting chains; Frequency dividers comprising counting chains (H03K29/00 takes precedence) +3 CPC IPC+CPC Available in IPC and CPC
- H03K 25/00 Pulse counters with step-by-step integration and static storage; Analogous frequency dividers IPC+CPC Available in IPC and CPC
- H03K 27/00 Pulse counters in which pulses are continuously circulated in a closed loop; Analogous frequency dividers (feedback shift register counters H03K23/54) IPC+CPC Available in IPC and CPC
- H03K 29/00 Pulse counters comprising multi-stable elements, e.g. for ternary scale, for decimal scale; Analogous frequency dividers IPC+CPC Available in IPC and CPC
- H03K 3/00 Circuits for generating electric pulses; Monostable, bistable or multistable circuits (H03K4/00 takes precedence; for digital function generators in computers G06F1/02) IPC+CPC Available in IPC and CPC
- H03K 4/00 Generating pulses having essentially a finite slope or stepped portions IPC+CPC Available in IPC and CPC
- H03K 5/00 Manipulating of pulses not covered by one of the other main groups of this subclass (circuits with regenerative action H03K3/00, H03K4/00; by the use of non-linear magnetic or dielectric devices H03K3/45) +4 CPC IPC+CPC Available in IPC and CPC
- H03K 6/00 Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass (circuits with regenerative action H03K4/00) IPC+CPC Available in IPC and CPC
- H03K 7/00 Modulating pulses with a continuously-variable modulating signal IPC+CPC Available in IPC and CPC
- H03K 9/00 Demodulating pulses which have been modulated with a continuously-variable signal IPC+CPC Available in IPC and CPC
- H03K 99/00 Subject matter not provided for in other groups of this subclass since 2013 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class H03,2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 5,625
- SAMSUNG ELECTRONICS COMPANY KR 5,496
- MURATA MANUFACTURING COMPANY JP 5,478
- HUAWEI TECHNOLOGIES COMPANY CN 3,383
- INTEL CORPORATION US 3,091
- TEXAS INSTRUMENTS US 3,070
- MURATA MANUFACTURING COMPANY 2,722
- SKYWORKS SOLUTIONS US 2,290
- SEIKO EPSON CORPORATION 2,177
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,158
Top Applicants (CPC)
Class H03,2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG ELECTRONICS COMPANY KR 7,293
- QUALCOMM US 7,085
- MURATA MANUFACTURING COMPANY JP 5,982
- HUAWEI TECHNOLOGIES COMPANY CN 4,641
- INTEL CORPORATION US 3,863
- TEXAS INSTRUMENTS US 3,409
- MURATA MANUFACTURING COMPANY 2,874
- SK HYNIX KR 2,644
- SKYWORKS SOLUTIONS US 2,545
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,437