JPS5669908A - Field effect transistor circuit with protecting circuit - Google Patents

Field effect transistor circuit with protecting circuit

Info

Publication number
JPS5669908A
JPS5669908A JP14826279A JP14826279A JPS5669908A JP S5669908 A JPS5669908 A JP S5669908A JP 14826279 A JP14826279 A JP 14826279A JP 14826279 A JP14826279 A JP 14826279A JP S5669908 A JPS5669908 A JP S5669908A
Authority
JP
Japan
Prior art keywords
electric power
power source
fet11
circuit
oscillator
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
JP14826279A
Other languages
Japanese (ja)
Inventor
Yasunari Kajiwara
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP14826279A priority Critical patent/JPS5669908A/en
Publication of JPS5669908A publication Critical patent/JPS5669908A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply

Landscapes

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

Abstract

PURPOSE:To prevent an amplifying element from breaking down in on-off operation by controlling the electric power source of the amplifying element by the output of an oscillator sharing the electric power source with the amplifying element. CONSTITUTION:When electric power source 2 is put to work, oscillator 12 starts oscillation and its output is applied to rectifier 13. The output voltage of rectifier 13 is applied to the gate electrode of FET11 and also to electric power source controller 15. Controller 15, when the input voltage exceeds a prescribed value, turns on transistor 14 to supply electric power to FET11. At this time, FET11 has already been applied with the voltage at its gate and no excessive current flows. When electric power source 2 is turned off, oscillator 12 stops the oscillation and consequently while the gate voltage of FET disappears, transistor 14 turns off, stopping the supply of electric power to FET11.
JP14826279A 1979-11-12 1979-11-12 Field effect transistor circuit with protecting circuit Pending JPS5669908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14826279A JPS5669908A (en) 1979-11-12 1979-11-12 Field effect transistor circuit with protecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14826279A JPS5669908A (en) 1979-11-12 1979-11-12 Field effect transistor circuit with protecting circuit

Publications (1)

Publication Number Publication Date
JPS5669908A true JPS5669908A (en) 1981-06-11

Family

ID=15448836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14826279A Pending JPS5669908A (en) 1979-11-12 1979-11-12 Field effect transistor circuit with protecting circuit

Country Status (1)

Country Link
JP (1) JPS5669908A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744578A1 (en) * 1996-02-06 1997-08-08 Motorola Semiconducteurs HIGH FREQUENCY AMLIFIER
JP2014168225A (en) * 2013-01-29 2014-09-11 Tdk Corp High frequency amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744578A1 (en) * 1996-02-06 1997-08-08 Motorola Semiconducteurs HIGH FREQUENCY AMLIFIER
EP0789451A1 (en) * 1996-02-06 1997-08-13 Motorola Semiconducteurs S.A. High frequency amplifier and control
JP2014168225A (en) * 2013-01-29 2014-09-11 Tdk Corp High frequency amplifier

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