GB780832A - Improvements in or relating to static electric switches - Google Patents

Improvements in or relating to static electric switches

Info

Publication number
GB780832A
GB780832A GB2789255A GB2789255A GB780832A GB 780832 A GB780832 A GB 780832A GB 2789255 A GB2789255 A GB 2789255A GB 2789255 A GB2789255 A GB 2789255A GB 780832 A GB780832 A GB 780832A
Authority
GB
United Kingdom
Prior art keywords
switch
switches
head
group
wgx1
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
GB2789255A
Inventor
Esmond Philip Goodwin Wright
John David Reynolds
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 GB2789255A priority Critical patent/GB780832A/en
Priority to GB3944656A priority patent/GB780833A/en
Priority to CH360099D priority patent/CH360099A/en
Priority to CH5746156A priority patent/CH363055A/en
Publication of GB780832A publication Critical patent/GB780832A/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
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/665—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only
    • H03K17/666—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only the output circuit comprising more than one controlled bipolar transistor
    • H03K17/668—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only the output circuit comprising more than one controlled bipolar transistor in a symmetrical configuration
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/62—Two-way amplifiers
    • 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
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/68—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors specially adapted for switching ac currents or voltages

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Digital Magnetic Recording (AREA)
  • Electronic Switches (AREA)

Abstract

780,832. Electric digital-data-storage apparatus. STANDARD TELEPHONES & CABLES, Ltd. Sept. 30, 1955, No. 27892/55. Class 106 (1). [Also in Group XXXVIII] In a circuit for establishing a connection between two sets 'of circuits via two stages of switches, one set of circuits is divided into groups 11 ... 14 to 41 ... 44, and each is connected to a corresponding switch HS11 ... 44 and each circuit W, R is multipled to a switch WGX1 ... 4, RGX1... 4 in turn multipled to a group of switches HS11 ... 14 &c. The switches WGX1 ... 4 are multipled to switches RGX1 ... 4 and control circuits are arranged for operating pairs of switches for setting up the desired transmission path. The switches are of a type having two transmission electrodes and a control electrode transmission occurring when a suitable potential is applied to the control electrode. The invention is described as applied to a magnetic storage drum DM to which information is applied through writing signal source W to a magnetic read/ record head 11 ... 44 from which information can also be fed out through reading amplifier R. Assuming it is desired to write through head 11 associated distributers WGX, WHX are set into the position 1, WGX1 closing directly the switch WGS1. The distributers also cause an output from gate G1 which passes through G2 to close the switch HS11. In a similar manner reading can take place simultaneously from head 44 by operating the distributers RGX, RHX so that potentials are applied to the leads RGX4,RHX4 causing through gates 93, 94, switch HS44 to close. The arrangement allows information to be written into the store through any head in a group and at the same time information can be read from a head in one of the other groups. In a practical embodiment, Fig. 2, the switch WGS1 consists of a pair of symmetrical transistors A, B as described in Specification 780,833, [Group XL (c)]. Normally the switch remains open due to a positive potential on the lead WGX 1. The switch HS11 comprises a symmetrical transistor C which is normally held in the off or open position by the connection of the base to a positive potential. When it is desired to write into head 11 a negative potential on lead WGX1 causes the transistor A,B to conduct and the switch WGS1 closes. Diodes MR6, MR9 are normally biased off, but the negative potentials on lead WGX1, WHX1 bias off diodes MR4, MR5 so that diode MR6 conducts, the base of transistor C falling so that it can conduct and switch HS11 closes. By applying potentials on the lead RGX1, RHX1 information could have been read from head 11 out through amplifier R. Protective circuits may be provided for ensuring that two head switches in one group are not closed at the same time, also that the write and read group switches in one group are not closed together. Switches of the type described in Specification 734,345, [Group XL (c)], employing two anodes and a single cathode may be used. Specification 780,831 also is referred to.
GB2789255A 1955-09-30 1955-09-30 Improvements in or relating to static electric switches Expired GB780832A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2789255A GB780832A (en) 1955-09-30 1955-09-30 Improvements in or relating to static electric switches
GB3944656A GB780833A (en) 1955-09-30 1955-09-30 Improvements in or relating to electrical switches
CH360099D CH360099A (en) 1955-09-30 1956-09-28 Switching device for establishing a signal transmission path between two sets of circuits
CH5746156A CH363055A (en) 1955-09-30 1956-09-28 Switching device with static electrical elements capable of transmission in both directions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2789255A GB780832A (en) 1955-09-30 1955-09-30 Improvements in or relating to static electric switches

Publications (1)

Publication Number Publication Date
GB780832A true GB780832A (en) 1957-08-07

Family

ID=10266969

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3944656A Expired GB780833A (en) 1955-09-30 1955-09-30 Improvements in or relating to electrical switches
GB2789255A Expired GB780832A (en) 1955-09-30 1955-09-30 Improvements in or relating to static electric switches

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB3944656A Expired GB780833A (en) 1955-09-30 1955-09-30 Improvements in or relating to electrical switches

Country Status (2)

Country Link
CH (2) CH363055A (en)
GB (2) GB780833A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5037516U (en) * 1973-07-30 1975-04-18

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801832A (en) * 1969-06-02 1974-04-02 Philips Corp Solid-state relay

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5037516U (en) * 1973-07-30 1975-04-18
JPS5426002Y2 (en) * 1973-07-30 1979-08-29

Also Published As

Publication number Publication date
CH360099A (en) 1962-02-15
GB780833A (en) 1957-08-07
CH363055A (en) 1962-07-15

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