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GB780833A - Improvements in or relating to electrical switches - Google Patents

Improvements in or relating to electrical switches

Info

Publication number
GB780833A
GB780833A GB3944656A GB3944656A GB780833A GB 780833 A GB780833 A GB 780833A GB 3944656 A GB3944656 A GB 3944656A GB 3944656 A GB3944656 A GB 3944656A GB 780833 A GB780833 A GB 780833A
Authority
GB
United Kingdom
Prior art keywords
electrodes
switches
volts
switch
circuit
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
GB3944656A
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
Publication of GB780833A publication Critical patent/GB780833A/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)
  • Electronic Switches (AREA)
  • Digital Magnetic Recording (AREA)

Abstract

780,833. Transistor and cold-cathode tube switching circuits. STANDARD TELEPHONES & CABLES, Ltd. Sept. 30, 1955, No. 39446/56. Divided out of 780,832, [Group XIX]. Class 40 (6). In an arrangement for connecting two signal circuits C1, C2 two switches A, B are connected in series and are of a type having two transmission electrodes and a control electrode, a twocondition circuit being associated with their connecting lead and. switching signals are applied to the whole circuit. In one state the switches A, B are off and the two-condition device is on and in the other state the switches are on and the device is off. In the circuit described symmetrical transistors are used with transmission electrodes A1, A2, B1, B2 with associated control electrodes A3, B3. When the switch is open the terminal D is maintained at plus 12 volts thereby ensuring that both base electrodes A3, B3 are positive with respect to the electrodes A1 ... B2, since due to rectifier MR3 conducting, the join A2, B2 is maintained at plus 10 volts. The switch is closed by lowering the potential of terminal D to minus 12 volts when the base electrodes A3, B3 fall below the potentials of their associated transmission electrodes. When the switch is open diode MR3 conducts to present a low-impedance path to earth for signal currents. In the closed position the diode is non-conducting and presents a high shunt impedance. The switches A, B may be cold-cathode tubes having two anodes and a single cathode as described in Specification 734,345. Specification 780,831 also is referred to.
GB3944656A 1955-09-30 1955-09-30 Improvements in or relating to electrical switches Expired GB780833A (en)

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
GB780833A true GB780833A (en) 1957-08-07

Family

ID=10266969

Family Applications (2)

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

Family Applications Before (1)

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

Country Status (2)

Country Link
CH (2) CH363055A (en)
GB (2) GB780832A (en)

Families Citing this family (2)

* 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
JPS5426002Y2 (en) * 1973-07-30 1979-08-29

Also Published As

Publication number Publication date
GB780832A (en) 1957-08-07
CH360099A (en) 1962-02-15
CH363055A (en) 1962-07-15

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