GB633099A - Improvements in or relating to electric counting circuits - Google Patents

Improvements in or relating to electric counting circuits

Info

Publication number
GB633099A
GB633099A GB700147A GB700147A GB633099A GB 633099 A GB633099 A GB 633099A GB 700147 A GB700147 A GB 700147A GB 700147 A GB700147 A GB 700147A GB 633099 A GB633099 A GB 633099A
Authority
GB
United Kingdom
Prior art keywords
valve
capacitor
conducting
circuit
potential
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB700147A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB700147A priority Critical patent/GB633099A/en
Publication of GB633099A publication Critical patent/GB633099A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K25/00—Pulse counters with step-by-step integration and static storage; Analogous frequency dividers

Landscapes

  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Prepayment Telephone Systems (AREA)
  • Meter Arrangements (AREA)

Abstract

633,099. Pulse frequency dividing circuits. STANDARD TELEPHONES & CABLES, Ltd., and GRAYSON, H. March 13, 1947, No. 7001. [Class 40 (vi)] In a frequency dividing circuit a capacitor is charged up in steps by the input pulse train until the potential across it exceeds a predetermined value when switching device is operated and unblocks a valve through which the capacitor discharges, the switching device then being restored to normal and the valve being reblocked after a given delay period. The Figure shows a circuit in which valve 7 is normally cut-off by grid current irow through resistor 20 and is rendered conducting by the input pulses applied at terminals 1, 2 to produce positive-going pulses in its anode circuit, the amplitudes of which are maintained constant by diodes 23, 24. Capacitor 8 is charged up in steps by these pulses via capacitor 27 and diode 28 until the potential across it is such that the normally non-conducting valve 10 of the cathode coupled flip-flop circuit comprised by valves 10 and 11 is rendered conducting and valve 11 is cut-off. The positive pulse at the anode of valve 11 is delayed in the network 13 and renders valve 9 conducting to discharge capacitor 8. When the capacitor has' discharged to earth potential which is ensured by diodes 28, 29, valve 9 is cut-off and the flip-flop returns to its normal state with valve 11 conducting. The resultant negative pulse at the anode of valve 11 cuts-off valve 9 after a delay determined by network 13 and the charging of capacitor 8 recommences. Diode 45 fixes the normal potential of the control grid and cathode of valve 11 and thus the triggering voltage of valve 10 and the output pulse of the circuit is taken from terminal 6.
GB700147A 1947-03-13 1947-03-13 Improvements in or relating to electric counting circuits Expired GB633099A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB700147A GB633099A (en) 1947-03-13 1947-03-13 Improvements in or relating to electric counting circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB700147A GB633099A (en) 1947-03-13 1947-03-13 Improvements in or relating to electric counting circuits

Publications (1)

Publication Number Publication Date
GB633099A true GB633099A (en) 1949-12-12

Family

ID=9824731

Family Applications (1)

Application Number Title Priority Date Filing Date
GB700147A Expired GB633099A (en) 1947-03-13 1947-03-13 Improvements in or relating to electric counting circuits

Country Status (1)

Country Link
GB (1) GB633099A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE962442C (en) * 1953-04-01 1957-04-25 Ebauches Sa Arrangement for converting from an electrical memory in preferably irregular sequence supplied, rapidly successive pulses into a number of electrical pulses proportional to the stored number of pulses or to a number of electrical pulses that corresponds to this electrical quantity
DE1016305B (en) * 1953-02-19 1957-09-26 Kieler Howaldtswerke Ag Arrangement for frequency division of periodic or counting of non-periodic pulses
GB2198305A (en) * 1986-11-12 1988-06-08 Crystal Semiconductor Corp Staircase circuit for generating reference voltages

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016305B (en) * 1953-02-19 1957-09-26 Kieler Howaldtswerke Ag Arrangement for frequency division of periodic or counting of non-periodic pulses
DE962442C (en) * 1953-04-01 1957-04-25 Ebauches Sa Arrangement for converting from an electrical memory in preferably irregular sequence supplied, rapidly successive pulses into a number of electrical pulses proportional to the stored number of pulses or to a number of electrical pulses that corresponds to this electrical quantity
GB2198305A (en) * 1986-11-12 1988-06-08 Crystal Semiconductor Corp Staircase circuit for generating reference voltages
GB2198305B (en) * 1986-11-12 1991-02-20 Crystal Semiconductor Corp Method and circuitry for generating stair-step voltage waveforms

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