Pulse counters comprising counting chains; Frequency dividers comprising counting chains (H03K29/00 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Pulse counters comprising counting chains; Frequency dividers comprising counting chains

CPC: Pulse counters comprising counting chains; Frequency dividers comprising counting chains (H03K29/00 takes precedence)

Full titles differ between systems:

IPC:

Pulse counters comprising counting chains; Frequency dividers comprising counting chains

CPC:

Pulse counters comprising counting chains; Frequency dividers comprising counting chains (H03K29/00 takes precedence)

Of 13 combined children, 10 exist in both systems.

3 codes are CPC-only extensions.

3 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1985.

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H03K 23/001 CPC only CPC only
H03K 23/002 CPC only CPC only
H03K 23/004 +3 CPC CPC only CPC only
H03K 23/40 Gating or clocking signals applied to all stages, i.e. synchronous counters since 1985 IPC+CPC Available in IPC and CPC
H03K 23/58 Gating or clocking signals not applied to all stages, i.e. asynchronous counters (H03K23/74 - H03K23/84 take precedence) since 1985 +2 CPC IPC+CPC Available in IPC and CPC
H03K 23/64 with a base or radix other than a power of two (H03K23/40 - H03K23/62 take precedence) since 1985 IPC+CPC Available in IPC and CPC
H03K 23/74 using relays since 1985 IPC+CPC Available in IPC and CPC
H03K 23/76 using magnetic cores or ferro-electric capacitors since 1985 +2 CPC IPC+CPC Available in IPC and CPC
H03K 23/78 using opto-electronic devices since 1985 IPC+CPC Available in IPC and CPC
H03K 23/80 using semiconductor devices having only two electrodes, e.g. tunnel diode, multi-layer diode since 1985 IPC+CPC Available in IPC and CPC
H03K 23/82 using gas-filled tubes since 1985 +1 CPC IPC+CPC Available in IPC and CPC
H03K 23/84 using thyristors or unijunction transistors since 1985 IPC+CPC Available in IPC and CPC
H03K 23/86 reversible (H03K23/40 - H03K23/84 take precedence) since 1985 IPC+CPC Available in IPC and CPC