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JPS5639608A - Current miller circuit - Google Patents

Current miller circuit

Info

Publication number
JPS5639608A
JPS5639608A JP11420179A JP11420179A JPS5639608A JP S5639608 A JPS5639608 A JP S5639608A JP 11420179 A JP11420179 A JP 11420179A JP 11420179 A JP11420179 A JP 11420179A JP S5639608 A JPS5639608 A JP S5639608A
Authority
JP
Japan
Prior art keywords
collector
voltage
transistor
trq4
trq2
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
JP11420179A
Other languages
Japanese (ja)
Inventor
Naoya Fujita
Toru Sanbe
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11420179A priority Critical patent/JPS5639608A/en
Publication of JPS5639608A publication Critical patent/JPS5639608A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To enable a current Miller circuit to operate stably without oscillating when a voltage drops, by clamping the collector potential of the transistor of the circuit so that the transistor will not be saturated. CONSTITUTION:The collector and base of transistor TRQ4 are connected in common to the collector of transistor Q1 and its emitter is connected to the collector of output side TRQ2. Then, TRQ4 operates as a diode and while the emitter side is the anode, base and collector sides are the cathode. Here, if power voltage Vcc drops, the emitter-collector voltage of TRQ2 decreases according to the drop in Vcc. On the other hand, when TRQ4 turns on, the voltage is clamped to the potential obtained by adding the forward volrage drop across the diode to the collector potential of TRQ1, and consequently TRQ2 will not be saturated, so that no oscillation will be caused. Conseqently, the current Miller circuit can be operated stably without any oscillation during a decrease in voltage.
JP11420179A 1979-09-07 1979-09-07 Current miller circuit Pending JPS5639608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11420179A JPS5639608A (en) 1979-09-07 1979-09-07 Current miller circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11420179A JPS5639608A (en) 1979-09-07 1979-09-07 Current miller circuit

Publications (1)

Publication Number Publication Date
JPS5639608A true JPS5639608A (en) 1981-04-15

Family

ID=14631727

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11420179A Pending JPS5639608A (en) 1979-09-07 1979-09-07 Current miller circuit

Country Status (1)

Country Link
JP (1) JPS5639608A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647840A (en) * 1985-02-14 1987-03-03 Kabushiki Kaisha Toshiba Current mirror circuit
JPH0296411A (en) * 1988-09-30 1990-04-09 Matsushita Electric Ind Co Ltd Current mirror circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5426646A (en) * 1977-07-30 1979-02-28 Toshiba Corp Current miller circuit
US4361816A (en) * 1980-06-30 1982-11-30 Rca Corporation Current mirror amplifiers with programmable gain

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5426646A (en) * 1977-07-30 1979-02-28 Toshiba Corp Current miller circuit
US4361816A (en) * 1980-06-30 1982-11-30 Rca Corporation Current mirror amplifiers with programmable gain

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647840A (en) * 1985-02-14 1987-03-03 Kabushiki Kaisha Toshiba Current mirror circuit
JPH0296411A (en) * 1988-09-30 1990-04-09 Matsushita Electric Ind Co Ltd Current mirror circuit
JP2586601B2 (en) * 1988-09-30 1997-03-05 松下電器産業株式会社 Current mirror circuit

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