IPC 6 English version H03K 6/00-H03K 17/98

IPC ⁶ English version

H03K 4/00 - H03K 5/26

H03K00600-H03K01798

H03K 19/00 - H03K 29/06

SECTION H– ELECTRICITY

H 03

BASIC ELECTRONIC CIRCUITRY

H 03 K

PULSE TECHNIQUE (measuring pulse characteristics G 01 R; mechanical counters having an electrical input G 06 M; information storage devices in general G 11; sample-and-hold arrangements in electric analogue stores G 11 C 27/02; construction of switches involving contact making and breaking for generation of pulses, e.g. by using a moving magnet, H 01 H; static conversion of electric power H 02 M; generation of oscillations by circuits employing active elements which operate in a non-switching manner H 03 B; modulating sinusoidal oscillations with pulses H 03 C, H 04 L; discriminator circuits involving pulse counting H 03 D; automatic control of generators H 03 L; starting, synchronisation, or stabilisation of generators where the type of generator is irrelevant or unspecified H 03 L; coding, decoding or code conversion, in general H 03 M) [4]

Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass (circuits with regenerative action H 03 K 4/00)

Note

In this group, the input signals are of the pulse type. [3]

Amplifying pulses

Modifying slopes of pulses, e.g. S-correction (S-correction in television H 04 N 3/23)

Modulating pulses with a continuously-variable modulating signal

Amplitude modulation, i.e. PAM

Position modulation, i.e. PPM

Frequency or rate modulation, i.e. PFM or PRM

Duration or width modulation

Combined modulation, e.g. rate modulation and amplitude modulation

Demodulating pulses which have been modulated with a continuously-variable signal

of amplitude-modulated pulses

of position-modulated pulses

of frequency- or rate-modulated pulses

of duration- or width-modulated pulses

of pulses having combined modulation

11/

Transforming types of modulation, e.g. position-modulated pulses into duration-modulated pulses

12/

Producing pulses by distorting or combining sinusoidal waveforms (shaping pulses H 03 K 5/01; combining sinewaves using elements operating in a non-switching manner H 03 B) [3]

17/

Electronic switching or gating, i.e. not by contact-making and -breaking (selection of the stylus or auxiliary electrode in electric printing B 41 J 2/405; sample-and-hold arrangements G 11 C 27/02; switching or interrupting devices in waveguides H 01 P; gated amplifiers H 03 F 3/72; switching arrangements for exchange systems using static devices H 04 Q 3/52)

17/

Modifications for accelerating switching [3]

17/

041

without feedback from the output circuit to the control circuit [6]

17/

0412

by measures taken in the control circuit [6]

17/

0414

Anti-saturation measures [6]

17/

0416

by measures taken in the output circuit [6]

17/

042

by feedback from the output circuit to the control circuit [6]

17/

0422

Anti-saturation measures [6]

17/

0424

by the use of a transformer [6]

17/

Modifications for ensuring a fully conducting state [3]

17/

Modifications for protecting switching circuit against overcurrent or overvoltage [3]

17/

081

without feedback from the output circuit to the control circuit [6]

17/

0812

by measures taken in the control circuit [6]

17/

0814

by measures taken in the output circuit [6]

17/

082

by feedback from the output to the control circuit [6]

17/

Modifications for increasing the maximum permissible switched voltage [3]

17/

Modifications for increasing the maximum permissible switched current [3]

17/

Modifications for switching at zero crossing (generating an impulse at zero crossing H 03 K 5/1536) [3]

17/

Modifications for compensating variations of physical values, e.g. of temperature [3]

17/

Modifications for eliminating interference voltages or currents [3]

17/

Modifications for indicating state of switch [3]

17/

Modifications for resetting core switching units to a predetermined state [3]

17/

Modifications for ensuring a predetermined initial state when the supply voltage has been applied (bi-stable generators H 03 K 3/12) [3]

17/

Storing the actual state when the supply voltage fails [3]

17/

Modifications for temporary blocking after receipt of control pulses [3]

17/

Modifications for introducing a time delay before switching (modifications to provide a choice of time-intervals for executing more than one switching action H 03 K 17/296) [3]

17/

284

in field-effect transistor switches [3]

17/

288

in tube switches [3]

17/

292

in thyristor, unijunction transistor or programmable unijunction transistor switches [3]

17/

296

Modifications to provide a choice of time-intervals for executing more than one switching action and automatically terminating their operation after the programme is completed (electronic clocks comprising means to be operated at preselected times or after preselected time-intervals G 04 G 15/00) [3]

17/

Modifications for providing a predetermined threshold before switching (shaping pulses by thresholding H 03 K 5/08) [3]

17/

characterised by the use of specified components (H 03 K 17/04 to H 03 K 17/30, H 03 K 17/94 take precedence) [3]

17/

by the use, as active elements, of gas-filled tubes [3]

17/

by the use, as active elements, of vacuum tubes (using diodes H 03 K 17/74) [3]

17/

by the use, as active elements, of semiconductor devices (using diodes H 03 K 17/74) [3]

17/

567

Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT [6]

17/

the devices being tunnel diodes [3]

17/

the devices being bipolar transistors (bipolar transistors having four or more electrodes H 03 K 17/72) [3]

17/

605

with galvanic isolation between the control circuit and the output circuit (H 03 K 17/78 takes precedence) [5]

17/

using transformer coupling [5]

17/

615

in a Darlington configuration [5]

17/

Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors (logic circuits H 03 K 19/00; code converters H 03 M 5/00, H 03 M 7/00) [3]

17/

having inductive loads [3]

17/

Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will [3]

17/

specially adapted for switching ac currents or voltages [3]

17/

687

the devices being field-effect transistors [3]

17/

689

with galvanic isolation between the control circuit and the output circuit (H 03 K 17/78 takes precedence) [5]

17/

691

using transformer coupling [5]

17/

693

Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors (logic circuits H 03 K 19/00; code converters H 03 M 5/00, H 03 M 7/00) [3]

17/

695

having inductive loads (protecting switching circuit against inductive flyback voltage H 03 K 17/08) [6]

17/

the devices having only two electrodes and exhibiting negative resistance (the devices being tunnel diodes H 03 K 17/58) [3]

17/

Bipolar semiconductor devices with more than two PN junctions, e.g. thyristors, programmable unijunction transistors, or with more than three electrodes, e.g. silicon controlled switches, or with more than one electrode connected to the same conductivity region, e.g. unijunction transistors [3]

17/

722

with galvanic isolation between the control circuit and the output circuit (H 03 K 17/78 takes precedence) [5]

17/

723

using transformer coupling [5]

17/

725

for ac voltages or currents (H 03 K 17/722, H 03 K 17/735 take precedence) [3,5]

17/

for dc voltages or currents (H 03 K 17/722, H 03 K 17/735 take precedence) [3,5]

17/

732

Measures for enabling turn-off [5]

17/

735

Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors (H 03 K 17/722 takes precedence; logic circuits H 03 K 19/00; code converters H 03 M 5/00, H 03 M 7/00) [3,5]

17/

by the use, as active elements, of diodes (by the use of more than one type of semiconductor device H 03 K 17/567; by the use of tunnel diodes H 03 K 17/58; by the use of negative resistance diodes H 03 K 17/70) [3]

17/

Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors (logic circuits H 03 K 19/00; code H 03 M 5/00, H 03 M 7/00) [3]

17/

by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled [3]

17/

785

controlling field-effect transistor switches [5]

17/

controlling semiconductor switches with more than two PN-junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region [5]

17/

795

controlling bipolar transistors [5]

17/

by the use, as active elements, of non-linear magnetic or dielectric devices [3]

17/

Switching arrangements with several input- or output-terminals, e.g. multiplexers, distributors (logic circuits H 03 K 19/00; code converters H 03 M 5/00, H 03 M 7/00) [3]

17/

the devices being transfluxors [3]

17/

the devices being thin-film devices [3]

17/

the devices being twistors [3]

17/

by the use, as active elements, of beam-deflection tubes [3]

17/

by the use, as active elements, of galvano-magnetic devices, e.g. Hall-effect devices (H 03 K 17/95, H 03 K 17/97 take precedence) [2,3]

17/

by the use, as active elements, of superconductive devices [2,3]

17/

characterised by the way in which the control signals are generated (mechanical structural details of control members of switches or keyboards, such as keys, push-buttons, levers or other mechanisms for transferring force to the activated elements, not directly producing electronic effects H 01 H; keyboards for special applications, see the relevant places, e.g. B 41 J, G 06 F 3/023, H 04 L 15/00, H 04 L 17/00, H 04 M 1/00) [3,4]

17/

945

Proximity switches (H 03 K 17/96 takes precedence) [3]

17/

using a magnetic detector [3]

17/

955

using a capacitive detector [3]

17/

Touch switches [3]

17/

965

Switches controlled by moving an element forming part of the switch [3]

17/

967

having a plurality of control members, e.g. keyboard (H 03 K 17/969, H 03 K 17/972, H 03 K 17/98 take precedence) [4]

17/

968

using opto-electronic devices [4]

17/

969

having a plurality of control members, e.g. keyboard [4]

17/

using a magnetic movable element [3]

17/

972

having a plurality of control members, e.g. keyboard [4]

17/

975

using a capacitive movable element [3]

17/

having a plurality of control members, e.g. keyboard [4]

H03K 4/00 - H03K 5/26

H03K 19/00 - H03K 29/06