JPS55141858A - Transistor switch circuit - Google Patents

Transistor switch circuit

Info

Publication number
JPS55141858A
JPS55141858A JP5069779A JP5069779A JPS55141858A JP S55141858 A JPS55141858 A JP S55141858A JP 5069779 A JP5069779 A JP 5069779A JP 5069779 A JP5069779 A JP 5069779A JP S55141858 A JPS55141858 A JP S55141858A
Authority
JP
Japan
Prior art keywords
unit
transistor
relay
exchanger
signal
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.)
Pending
Application number
JP5069779A
Other languages
Japanese (ja)
Inventor
Shinjiro Suzuki
Kyoji Shinohara
Mikio Murozaki
Yoshio Takekoshi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP5069779A priority Critical patent/JPS55141858A/en
Publication of JPS55141858A publication Critical patent/JPS55141858A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/50—Conversion between different kinds of signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To make small and highly reliable the terminal unit, by providing the swtching section set according to the power supply voltage at the exchanger side and the transistor, in controlling the relay of other unit such as exchanger from the carrier telephone terminal station unit and transmitting dial signal. CONSTITUTION:In controlling the relay RL of other unit B such as exchanger from the carrier telephone terminal station unit A and transmitting the signal such as dial signal, when a pulse signal is fed to the base of the transistor Q1 for input signal, the transistors Q1, Q2 are both ON, and the relay RL of the unit B is activated through the current supply via the switching section S and the transistor Q2 from the power supply of -V. If the power supply of the exchanger B is +V, the operation of the relay RL is controlled with the transistor Q2 by setting the connection of the switching section S as dotted lines. Further, the switching section S can be replaced with the diode bridge circuit D.
JP5069779A 1979-04-24 1979-04-24 Transistor switch circuit Pending JPS55141858A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5069779A JPS55141858A (en) 1979-04-24 1979-04-24 Transistor switch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5069779A JPS55141858A (en) 1979-04-24 1979-04-24 Transistor switch circuit

Publications (1)

Publication Number Publication Date
JPS55141858A true JPS55141858A (en) 1980-11-06

Family

ID=12866097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5069779A Pending JPS55141858A (en) 1979-04-24 1979-04-24 Transistor switch circuit

Country Status (1)

Country Link
JP (1) JPS55141858A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5250622B2 (en) * 1972-07-19 1977-12-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5250622B2 (en) * 1972-07-19 1977-12-26

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