GB887654A - Improvements in cryotron switching circuits - Google Patents

Improvements in cryotron switching circuits

Info

Publication number
GB887654A
GB887654A GB26959A GB26959A GB887654A GB 887654 A GB887654 A GB 887654A GB 26959 A GB26959 A GB 26959A GB 26959 A GB26959 A GB 26959A GB 887654 A GB887654 A GB 887654A
Authority
GB
United Kingdom
Prior art keywords
circuit
cryotron
current
winding
control
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
GB26959A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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
Priority claimed from US704455A external-priority patent/US2966598A/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to GB26959A priority Critical patent/GB887654A/en
Publication of GB887654A publication Critical patent/GB887654A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/38—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of superconductive devices
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/44—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using super-conductive elements, e.g. cryotron

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

887,654. Super-conductor circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Jan. 2, 1959 No. 269/59. Class 40 (9). A control conductor of a cryotron is connected in series with its own gate conductor. The control winding opposes a bias winding producing a magnetic field less than the critical field 1.HC required to make the cryotron resistive. The cryotron can then carry a current producing a field greater than 1.HC without driving itself resistive. A latch-type circuit flips over in response to an interruption on a control circuit and remains in a stable condition until re-set. A flip-flop circuit responds to pulses. Latch type circuit, Fig. 5.-With current flowing in a computer circuit 22, cryotron K5 is made resistive by a momentary setting current in control winding C5. The current from source 40 flows through cryotron K4 in which the resultant of the control current + 1.1HC in winding C4a and of a biasing current - 1.9HC in winding C4b, leaves the cryotron super-conductive. With no current in cryotron K3, the control current + 1.1HC in winding C3a drives the cryotron resistive. When circuit 22 is interrupted, K3 becomes super-conductive, the bias drives K4 resistive and the current from source 40 switches from K4 to K3. The circuit remains in this stable state when circuit 22 is again completed as the self-biasing current in winding C3b is sufficient to make the control winding C3a ineffective. Cryotron K6 enables the condition of the circuit to be detected. Flip-flop circuit, Fig. 6.-Cryotrons K7, K8 are cross-connected to form a bi-stable circuit in which the current from source 56 flows either in limb A or in limb B. A pulse supplied from source 62 to point 60 is steered by self-biasing cryotrons K10, K13 to the control windings C12, C9 of cryotrons K12, K9, whereby the superconductive circuit of the pair A, B is made resistive. The state of the circuit may be detected by means of cryotrons K11, K14. Mutual inductances 82, 84 compensate for the mutual inductance between windings C10a, C10b and between C13a, C13b. Additional cryotrons may be included in the circuit for the same purpose (Fig. 8, not shown). Specifications 862,178 and 887,652 are referred to.
GB26959A 1957-12-23 1959-01-02 Improvements in cryotron switching circuits Expired GB887654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB26959A GB887654A (en) 1957-12-23 1959-01-02 Improvements in cryotron switching circuits

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US704455A US2966598A (en) 1957-12-23 1957-12-23 Superconductor circuits
GB26959A GB887654A (en) 1957-12-23 1959-01-02 Improvements in cryotron switching circuits

Publications (1)

Publication Number Publication Date
GB887654A true GB887654A (en) 1962-01-24

Family

ID=26235803

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26959A Expired GB887654A (en) 1957-12-23 1959-01-02 Improvements in cryotron switching circuits

Country Status (1)

Country Link
GB (1) GB887654A (en)

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