JPS56120206A - Transistor circuit - Google Patents

Transistor circuit

Info

Publication number
JPS56120206A
JPS56120206A JP2354780A JP2354780A JPS56120206A JP S56120206 A JPS56120206 A JP S56120206A JP 2354780 A JP2354780 A JP 2354780A JP 2354780 A JP2354780 A JP 2354780A JP S56120206 A JPS56120206 A JP S56120206A
Authority
JP
Japan
Prior art keywords
current
circuit
transistor
constant
collector
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.)
Granted
Application number
JP2354780A
Other languages
Japanese (ja)
Other versions
JPH0130330B2 (en
Inventor
Naotoshi Higashiyama
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2354780A priority Critical patent/JPS56120206A/en
Publication of JPS56120206A publication Critical patent/JPS56120206A/en
Publication of JPH0130330B2 publication Critical patent/JPH0130330B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers

Landscapes

  • Electronic Switches (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To prevent malfunction of a switch circuit due to leakage current of the output of a comparator, by constituting one of two reference voltage sources with a constant voltage element and a constant current source which supplies the operating current to this element, and connecting the input of a current inversion circuit in series with the constant voltage element. CONSTITUTION:To two inputs 20, 13 of a comparator 5 consisting of transistors 1 and 2 driven with a constant current source 4, the 1st and 2nd reference voltage supplies 23 and 12 are respectively connected. Further, the 2nd reference voltage source 12 consists of a constant voltate circuit 8 and a constant current source 9 which supplies operating current to the circuit 8. The collector of a transistor 25 of the circuit 8 is connected to the base of a transistor 26 of a current absorbing circuit 27, and the collector of the transistor 26 is connected to the connection point between the output terminal 17 of a current inversion circuit 16 and the base of a transistor 18 being the switch of a load circuit. Further, the collector current of the transistor 25 absorbs the leakage current produced at the current circuit 16.
JP2354780A 1980-02-27 1980-02-27 Transistor circuit Granted JPS56120206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2354780A JPS56120206A (en) 1980-02-27 1980-02-27 Transistor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2354780A JPS56120206A (en) 1980-02-27 1980-02-27 Transistor circuit

Publications (2)

Publication Number Publication Date
JPS56120206A true JPS56120206A (en) 1981-09-21
JPH0130330B2 JPH0130330B2 (en) 1989-06-19

Family

ID=12113498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2354780A Granted JPS56120206A (en) 1980-02-27 1980-02-27 Transistor circuit

Country Status (1)

Country Link
JP (1) JPS56120206A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61149429U (en) * 1985-03-06 1986-09-16

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5470354U (en) * 1977-10-26 1979-05-18
JPS5472946A (en) * 1977-11-02 1979-06-11 Philips Nv Threshold switch circuit array

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5470354U (en) * 1977-10-26 1979-05-18
JPS5472946A (en) * 1977-11-02 1979-06-11 Philips Nv Threshold switch circuit array

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61149429U (en) * 1985-03-06 1986-09-16

Also Published As

Publication number Publication date
JPH0130330B2 (en) 1989-06-19

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