GB717118A - Improvements in or relating to tree type electrical circuits - Google Patents

Improvements in or relating to tree type electrical circuits

Info

Publication number
GB717118A
GB717118A GB509850A GB509850A GB717118A GB 717118 A GB717118 A GB 717118A GB 509850 A GB509850 A GB 509850A GB 509850 A GB509850 A GB 509850A GB 717118 A GB717118 A GB 717118A
Authority
GB
United Kingdom
Prior art keywords
valve
valves
circuit
grid
positive
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
GB509850A
Inventor
Edward Arthur Newman
Donald Watts Davies
Ronald Fraser Braybrook
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB509850A priority Critical patent/GB717118A/en
Publication of GB717118A publication Critical patent/GB717118A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/54—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements of vacuum tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/525—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using tubes in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Particle Accelerators (AREA)

Abstract

717,118. Electronic calculating-apparatus. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Feb. 5, 1951 [Feb. 28, 1950], No. 5098/50. Class 106 (1) An output circuit arrangement for a tree circuit comprises a series of thermionic valves having separate anode loads and input circuits but a common cathode load. The valves are arranged to be controlled separately by the output voltages from the tree circuit so that only one selected valve in the series passes anode current at each setting of the tree circuit. A tree circuit 1 of order n comprises 2n output leads each feeding the control grid of one of a series of valves 2, 3, 4, &c. Normally the grids are at or below cut-off potential, and when the potential of one grid is raised by a setting of the tree circuit, the respective valve conducts, its anode voltage falls, and the potential on the grid of an associated valve 11 in a gate circuit 9, is lowered. The cathode potential of valves 10 and 11 is thereby lowered and valve 10, whose grid is maintained at -220v, conducts. Thus, a positive .pulse signal applied at the grid of a valve 15 in the anode circuit of valve 10 will cause a negative output pulse from the anode of valve 15 only when the associated tree controlled valve 2 is conducting. The common cathode load 5 may be replaced by a control circuit, Fig. 2, which becomes conducting only when a positive-going pulse is applied to the grid of a valve 17. When working with very short duration and high frequency pulses the anode loads and coupling circuits of the valves 2, 3, 4, &c., Fig. 1, are provided with de-coupling and correcting impedances. In Fig. 2 two further valves 20, 21 having their cathodes and grids connected and controlled in the, same manner as the valves 17 and 18 have inductive loads 22, 23 giving sharp negative and positive peaks which are applied to' valves 24 and 25. The cathode follower 25 applies the positive "off" peak from valve 20 as a positive voltage pulse to the common cathodes in the tree output circuit, Fig. 1: the valve 24 applies the positive "on" peak from valve 21 as a negative voltage pulse to the common cathodes. Specification 717,114 is referred to.
GB509850A 1950-02-28 1950-02-28 Improvements in or relating to tree type electrical circuits Expired GB717118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB509850A GB717118A (en) 1950-02-28 1950-02-28 Improvements in or relating to tree type electrical circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB509850A GB717118A (en) 1950-02-28 1950-02-28 Improvements in or relating to tree type electrical circuits

Publications (1)

Publication Number Publication Date
GB717118A true GB717118A (en) 1954-10-20

Family

ID=9789699

Family Applications (1)

Application Number Title Priority Date Filing Date
GB509850A Expired GB717118A (en) 1950-02-28 1950-02-28 Improvements in or relating to tree type electrical circuits

Country Status (1)

Country Link
GB (1) GB717118A (en)

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