GB878105A - Improvements in or relating to electronic switching devices - Google Patents
Improvements in or relating to electronic switching devicesInfo
- Publication number
- GB878105A GB878105A GB35898/58A GB3589858A GB878105A GB 878105 A GB878105 A GB 878105A GB 35898/58 A GB35898/58 A GB 35898/58A GB 3589858 A GB3589858 A GB 3589858A GB 878105 A GB878105 A GB 878105A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- tube
- conductivity
- state
- gas discharge
- 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
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
-
- 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
- H04Q3/521—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 semiconductors in the switching stages
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Amplifiers (AREA)
Abstract
878,105. Transistor switching circuits. COMPAGNIE INDUSTRIELLES DES TELEPHONES. Nov. 7, 1958 [Nov. 8, 1957], No. 35898/58. Class 40(6) A switching circuit comprises a transistor having two electrodes connected to the points across which a connection is to be made and the third electrode having its potential and thus the state of conductivity of the transistor controlled by a gas discharge tube. Fig. 1 shows a transistor circuit in which it is required to make a connection between points A and B in dependence upon the state of conductivity of the PNP junction transistor T. When gas discharge tube L is not conducting the base of transistor T is positive with respect to the emitter and the transistor is blocked. When switches H and V are closed gas tube L conducts the voltage drop across resistor L being sufficient to cause the transistor T to conduct. The transistor may be blocked again by interrupting the current flow through gas tube L by opening switch V. An alternative arrangement of triggering the gas discharge tube is described, Fig. 2, not shown. Fig. 3 shows a matrix comprising m horizontal rows and q vertical columns only rows X1, X2 and Xm with columns Y1, Y2 and Yq being shown. The connections between any given row and any given column being determined by the state of conductivity of the transistor connecting the cross over points. As described in connection with Fig. 1 each transistor is controlled in dependence upon the state of conductivity of an associated gas discharge tube. Only that gas tube will be struck and its associated transistor rendered conductive which by operation of the associated switches has appropriate potentials applied to its anode cathode and trigger electrodes. If for example tube L21 has been struck so that transistor T21 bridges row X2 and column Y1 then the voltage drop across resistor R1 c prevents the firing of any other gas tube in column Y1. If the voltage Vs is suppressed the tube L21 memorises its operation and continues to operate between anode and cathode so that to stop operation it is necessary to open switch V1 in the circuit which provides the appropriate cathode potential. Specification 861,139 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1101513X | 1957-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB878105A true GB878105A (en) | 1961-09-27 |
Family
ID=9621053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35898/58A Expired GB878105A (en) | 1957-11-08 | 1958-11-07 | Improvements in or relating to electronic switching devices |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH361842A (en) |
| DE (1) | DE1101513B (en) |
| FR (1) | FR1185907A (en) |
| GB (1) | GB878105A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE601682A (en) * | 1960-03-23 | 1900-01-01 | ||
| DE1267268B (en) * | 1966-01-14 | 1968-05-02 | Siemens Ag | Coupling network with electronic switching for telecommunication switching systems |
| JPS5929036B2 (en) * | 1973-06-29 | 1984-07-17 | 株式会社日立製作所 | semiconductor communication path switch |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE891554C (en) * | 1951-11-06 | 1953-09-28 | Siemens Ag | Circuit arrangement for controlling discharge tubes containing secondary electron paths, preferably in telephone systems |
| BE541096A (en) * | 1954-09-08 | |||
| BE551490A (en) * | 1955-10-05 |
-
1957
- 1957-11-08 FR FR1185907D patent/FR1185907A/en not_active Expired
-
1958
- 1958-10-29 CH CH361842D patent/CH361842A/en unknown
- 1958-11-07 GB GB35898/58A patent/GB878105A/en not_active Expired
- 1958-11-07 DE DEC17799A patent/DE1101513B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CH361842A (en) | 1962-05-15 |
| DE1101513B (en) | 1961-03-09 |
| FR1185907A (en) | 1959-08-10 |
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