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IPC 7
  H03K 6/00 - H03K 17/98  
H03K01900-H03K02906
 

SECTION H – ELECTRICITY


H 03BASIC ELECTRONIC CIRCUITRY


H 03 KPULSE TECHNIQUE (measuring pulse characteristics G01R; mechanical counters having an electrical input G06M; information storage devices in general G11; sample-and-hold arrangements in electric analogue stores G11C 27/02; construction of switches involving contact making and breaking for generation of pulses, e.g. by using a moving magnet, H01H; static conversion of electric power H02M; generation of oscillations by circuits employing active elements which operate in a non-switching manner H03B; modulating sinusoidal oscillations with pulses H03C, H04L; discriminator circuits involving pulse counting H03D; automatic control of generators H03L; starting, synchronisation, or stabilisation of generators where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) [4]


19/

00Logic circuits, i.e. having at least two inputs acting on one output (circuits for computer systems using fuzzy logic G06N 7/02); Inverting circuits

19/

003.Modifications for increasing the reliability  [3]

19/

007.Fail-safe circuits  [3]

19/

01.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 G06F 3/00, G06F 13/00)  [5]

19/

018..using bipolar transistors only  [5]

19/

0185..using field-effect transistors only  [5]

19/

02.using specified components (H03K 19/003 to H03K 19/0175 take precedence)  [3,5]

19/

04..using gas-filled tubes

19/

06..using vacuum tubes (using diode rectifiers H03K 19/12)

19/

08..using semiconductor devices (H03K 19/173 takes precedence; wherein the semiconductor devices are only diode rectifiers H03K 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/

09....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 (H03K 19/096 takes precedence)  [5]

19/

0948.....using CMOS  [5]

19/

0952....using Schottky type FET (H03K 19/096 takes precedence)  [5]

19/

0956....Schottky diode FET logic (H03K 19/096 takes precedence)  [5]

19/

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

19/

098...using thyristors  [3]

19/

10...using tunnel diodes  [3]

19/

12..using diode rectifiers

19/

14..using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled (optical logic elements G02F 3/00)

19/

16..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/

17..using twistors

19/

173..using elementary logic circuits as components  [3]

19/

177...arranged in matrix form  [3]

19/

18..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/

19...using ferro-resonant devices  [2]

19/

195..using superconductive devices  [2,3]

19/

20.characterised by logic function, e.g. AND, OR, NOR, NOT circuits (H03K 19/003 to H03K 19/01 take precedence)

19/

21..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/

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


21/

00Details of pulse counters or frequency dividers

21/

02.Input circuits  [4]

21/

08.Output circuits  [4]

21/

10..comprising logic circuits

21/

12..with parallel read-out  [4]

21/

14..with series read-out of number stored  [4]

21/

16.Circuits for carrying-over pulses between successive decades

21/

17..with field-effect transistors  [4]

21/

18.Circuits for visual indication of the result  [4]

21/

20..using glow-discharge lamps

21/

38.Starting, stopping, or resetting the counter (counters with a base other than a power of two H03K 23/48, H03K 23/66)  [4]

21/

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


23/

00Pulse counters comprising counting chains; Frequency dividers comprising counting chains (H03K 29/00 takes precedence)

23/

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

23/

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

23/

44...using field-effect transistors  [4]

23/

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

23/

48..with a base or radix other than a power of two (H03K 23/42 takes precedence)  [4]

23/

50..using bi-stable regenerative trigger circuits (H03K 23/42 to H03K 23/48 take precedence)  [4]

23/

52...using field-effect transistors  [4]

23/

54...Ring counters, i.e. feedback shift register counters (H03K 23/52 takes precedence)  [4]

23/

56...Reversible counters (H03K 23/52 takes precedence)  [4]

23/

58.Gating or clocking signals not applied to all stages, i.e. asynchronous counters (H03K 23/74 to H03K 23/84 take precedence)  [4]

23/

60..with field-effect transistors  [4]

23/

62..reversible  [4]

23/

64.with a base or radix other than a power of two (H03K 23/40 to H03K 23/62 take precedence)  [4]

23/

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

23/

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

23/

70..with a base which is an odd number (H03K 23/66 takes precedence)  [4]

23/

72..Decade counters (H03K 23/66 takes precedence)  [4]

23/

74.using relays  [4]

23/

76.using magnetic cores or ferro-electric capacitors  [4]

23/

78.using opto-electronic devices  [4]

23/

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

23/

82.using gas-filled tubes  [4]

23/

84.using thyristors or unijunction transistors  [4]

23/

86.reversible (H03K 23/40 to H03K 23/84 take precedence)  [4]


25/

00Pulse counters with step-by-step integration and static storage; Analogous frequency dividers

25/

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

25/

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

25/

12.comprising hysteresis storage


27/

00Pulse counters in which pulses are continuously circulated in a closed loop; Analogous frequency dividers (feedback shift register counters H03K 23/54) [4]


29/

00Pulse counters comprising multi-stable elements, e.g. for ternary scale, for decimal scale; Analogous frequency dividers

29/

04.using multi-cathode gas discharge tubes  [4]

29/

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


  H03K 6/00 - H03K 17/98   
 

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