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(0)H03K:5/5:

IPC6

SECTION H - ELECTRICITY

PULSE TECHNIQUE

H03K

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H03K021/00 - H03K029/04

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Details of pulse counters or frequency dividers

Input circuits [4]

Output circuits [4]

comprising logic circuits

with parallel read-out [4]

with series read-out of number stored [4]

Circuits for carrying-over pulses between successive decades

with field-effect transistors [4]

Circuits for visual indication of the result [4]

using glow-discharge lamps

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]

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

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

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

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

using field-effect transistors [4]

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

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

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

using field-effect transistors [4]

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

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

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]

with field-effect transistors [4]

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]

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

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

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

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

using relays [4]

using magnetic cores or ferro-electric capacitors [4]

using opto-electronic devices [4]

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

using gas-filled tubes [4]

using thyristors or unijunction transistors [4]

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

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

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

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

comprising hysteresis storage

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]

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

using multi-cathode gas discharge tubes [4]

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

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