GB980956A - Electrical switching arrangement - Google Patents

Electrical switching arrangement

Info

Publication number
GB980956A
GB980956A GB706662A GB706662A GB980956A GB 980956 A GB980956 A GB 980956A GB 706662 A GB706662 A GB 706662A GB 706662 A GB706662 A GB 706662A GB 980956 A GB980956 A GB 980956A
Authority
GB
United Kingdom
Prior art keywords
output
transistor
amplifier
voltage
load
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
GB706662A
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 GB980956A publication Critical patent/GB980956A/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
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • 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
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/20—Repeater circuits; Relay circuits
    • H04L25/24—Relay circuits using discharge tubes or semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Electronic Switches (AREA)

Abstract

980,956. Transistor pulse amplifier circuits; keying circuits. STANDARD TELEPHONES & CABLES Ltd. Feb. 23, 1962 [Feb. 28, 1961], No. 7066/62. Headings H3R, H3T and H4P. A bi-stable circuit suitable for use as a telegraph repeater comprises an amplifier fed from a source of oscillators through a gate and feeding a rectifier which provides both the output signal and a feedback signal which maintains the gate open when open and closed when closed. In Fig. 1 a sine or square wave signal is applied via C1 and a D.C. restorer C2, G1 to a transistor amplifier T2 the output of which is rectified and smoothed at G2, C3, R4 before application to a load R5, the voltage across the load being clamped at + 60 V. by a rectifier G3. The D.C. output is also fed through R6 to maintain a transistor T1 non-conducting. If a positive triggering pulse is applied via C5, transistor T1 is rendered conducting short-circuiting the input to the amplifier so that the rectified output voltage falls to zero. The voltage now fed back through R6 maintains T1 conducting so that the output remains zero. The circuit may be restored to the original state by applying a positive pulse to C5. Fig. 2 shows two such arrangements using transistors of opposite conductivity and operative alternatively so that rectifiers C3 clamp the voltage across the load R5 at + 60 V. or - 60 V. depending on which circuit is operative. Rectifiers G4 and G4 1 in the input circuit limit the amplitude of the A.C. signal applied through R9 and R<SP>1</SP>9.
GB706662A 1961-02-28 1962-02-23 Electrical switching arrangement Expired GB980956A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL261742 1961-02-28

Publications (1)

Publication Number Publication Date
GB980956A true GB980956A (en) 1965-01-20

Family

ID=19752900

Family Applications (1)

Application Number Title Priority Date Filing Date
GB706662A Expired GB980956A (en) 1961-02-28 1962-02-23 Electrical switching arrangement

Country Status (3)

Country Link
BE (1) BE614429A (en)
DE (1) DE1144323B (en)
GB (1) GB980956A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157521A (en) * 1984-04-14 1985-10-23 Video Interactive Systems Ltd Improvements relating to interface circuits

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157521A (en) * 1984-04-14 1985-10-23 Video Interactive Systems Ltd Improvements relating to interface circuits

Also Published As

Publication number Publication date
DE1144323B (en) 1963-02-28
BE614429A (en) 1962-08-27

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