IPC 6 English version H03K 19/00-H03K 29/06

H03K01900-H03K02906

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]

19/

Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits

19/

003

Modifications for increasing the reliability [3]

19/

007

Fail-safe circuits [3]

19/

Modifications for accelerating switching [3]

19/

013

in bipolar transistor circuits [3]

19/

017

in field-effect transistor circuits [3]

19/

0175

Coupling arrangements; Interface arrangements (interface arrangements for digital computers G 06 F 3/00, G 06 F 13/00) [5]

19/

018

using bipolar transistors only [5]

19/

0185

using field-effect transistors only [5]

19/

using specified components (H 03 K 19/003 to H 03 K 19/0175 take precedence) [3,5]

19/

using gas-filled tubes

19/

using vacuum tubes (using diode rectifiers H 03 K 19/12)

19/

using semiconductor devices (H 03 K 19/173 takes precedence; wherein the semiconductor devices are only diode rectifiers H 03 K 19/12) [3]

19/

082

using bipolar transistors [3]

19/

084

Diode-transistor logic [3]

19/

086

Emitter coupled logic [3]

19/

088

Transistor-transistor logic [3]

19/

Resistor-transistor logic [3]

19/

091

Integrated injection logic or merged transistor logic [3]

19/

094

using field-effect transistors [3]

19/

0944

using MOSFET (H 03 K 19/096 takes precedence) [5]

19/

0948

using CMOS [5]

19/

0952

using Schottky type FET (H 03 K 19/096 takes precedence) [5]

19/

0956

Schottky diode FET logic (H 03 K 19/096 takes precedence) [5]

19/

096

Synchronous circuits, i.e. using clock signals [3]

19/

098

using thyristors [3]

19/

using tunnel diodes [3]

19/

using diode rectifiers

19/

using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled (optical logic elements G 02 F 3/00)

19/

using saturable magnetic devices

19/

162

using parametrons

19/

164

using ferro-resonant devices

19/

166

using transfluxors

19/

168

using thin-film devices

19/

using twistors

19/

173

using elementary logic circuits as components [3]

19/

177

arranged in matrix form [3]

19/

using galvano-magnetic devices, e.g. Hall-effect devices [2]

19/

185

using dielectric elements with variable dielectric constant, e.g. ferro-electric capacitors [2]

19/

using ferro-resonant devices [2]

19/

195

using superconductive devices [2,3]

19/

characterised by logic function, e.g. AND, OR, NOR, NOT circuits (H 03 K 19/003 to H 03 K 19/01 take precedence)

19/

EXCLUSIVE-OR circuits, i.e. giving output if input signal exists at only one input; COINCIDENCE circuits, i.e. giving output only if all input signals are identical [3]

19/

Majority or minority circuits, i.e. giving output having the state of the majority or the minority of the inputs [3]

21/

Details of pulse counters or frequency dividers

21/

Input circuits [4]

21/

Output circuits [4]

21/

comprising logic circuits

21/

with parallel read-out [4]

21/

with series read-out of number stored [4]

21/

Circuits for carrying-over pulses between successive decades

21/

with field-effect transistors [4]

21/

Circuits for visual indication of the result [4]

21/

using glow-discharge lamps

21/

Starting, stopping, or resetting the counter (counters with a base other than a power of two H 03 K 23/48, H 03 K 23/66) [4]

21/

Monitoring; Error detection; Preventing or correcting improper counter operation [4]

23/

Pulse counters comprising counting chains; Frequency dividers comprising counting chains (H 03 K 29/00 takes precedence)

23/

Gating or clocking signals applied to all stages, i.e. synchronous counters [4]

23/

Out-of-phase gating or clocking signals applied to counter stages [4]

23/

using field-effect transistors [4]

23/

using charge transfer devices, i.e. bucket brigade or charge coupled devices [4]

23/

with a base or radix other than a power of two (H 03 K 23/42 takes precedence) [4]

23/

using bi-stable regenerative trigger circuits (H 03 K 23/42 to H 03 K 23/48 take precedence) [4]

23/

using field-effect transistors [4]

23/

Ring counters, i.e. feedback shift register counters (H 03 K 23/52 takes precedence) [4]

23/

Reversible counters (H 03 K 23/52 takes precedence) [4]

23/

Gating or clocking signals not applied to all stages, i.e. asynchronous counters (H 03 K 23/74 to H 03 K 23/84 take precedence) [4]

23/

with field-effect transistors [4]

23/

reversible [4]

23/

with a base or radix other than a power of two (H 03 K 23/40 to H 03 K 23/62 take precedence) [4]

23/

with a variable counting base, e.g. by presetting or by adding or suppressing pulses [4]

23/

with a base which is a non-integer [4]

23/

with a base which is an odd number (H 03 K 23/66 takes precedence) [4]

23/

Decade counters (H 03 K 23/66 takes precedence) [4]

23/

using relays [4]

23/

using magnetic cores or ferro-electric capacitors [4]

23/

using opto-electronic devices [4]

23/

using semiconductor devices having only two electrodes, e.g. tunnel diode, multi-layer diode [4]

23/

using gas-filled tubes [4]

23/

using thyristors or unijunction transistors [4]

23/

reversible (H 03 K 23/40 to H 03 K 23/84 take precedence) [4]

25/

Pulse counters with step-by-step integration and static storage; Analogous frequency dividers

25/

comprising charge storage, e.g. capacitor without polarisation hysteresis

25/

using auxiliary pulse generator triggered by the incoming pulses [4]

25/

comprising hysteresis storage

27/

Pulse counters in which pulses are continuously circulated in a closed loop; Analogous frequency dividers (feedback shift register counters H 03 K 23/54) [4]

29/

Pulse counters comprising multi-stable elements, e.g. for ternary scale, for decimal scale; Analogous frequency dividers

29/

using multi-cathode gas discharge tubes [4]

29/

using beam-type tubes, e.g. magnetrons, cathode-ray tubes [4]

H03K 6/00 - H03K 17/98