JPS573405A - Fet bias voltage supplying circuit - Google Patents

Fet bias voltage supplying circuit

Info

Publication number
JPS573405A
JPS573405A JP7686980A JP7686980A JPS573405A JP S573405 A JPS573405 A JP S573405A JP 7686980 A JP7686980 A JP 7686980A JP 7686980 A JP7686980 A JP 7686980A JP S573405 A JPS573405 A JP S573405A
Authority
JP
Japan
Prior art keywords
voltage
bias voltage
supplying circuit
voltage supplying
fet bias
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
JP7686980A
Other languages
Japanese (ja)
Inventor
Masayuki Yabe
Katsuyuki Ishii
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 JP7686980A priority Critical patent/JPS573405A/en
Publication of JPS573405A publication Critical patent/JPS573405A/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
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/523—Circuit arrangements for protecting such amplifiers for amplifiers using field-effect devices

Landscapes

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

Abstract

PURPOSE:To prevent defective and deteriorated transistors (TR), by applying a drain bias while a gate bias voltage is applied. CONSTITUTION:When a switch S1 is turned on, a voltage V3 of a DC power supply U3 is applied to the emitter of a TRQ3 and a DC/DC converter U1, A voltage V1 converted at the converter U1 is applied to the gate of a TRQ1 as the gate bias. Simultaneously, the voltage V1 is fed to the emitter of a TRQ2 to turn on the TRQ2 when the voltage V1 is at a prescribed value. Thus, the TRQ3 also turns on to apply a drain bias to the drain of the TRQ1.
JP7686980A 1980-06-06 1980-06-06 Fet bias voltage supplying circuit Pending JPS573405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7686980A JPS573405A (en) 1980-06-06 1980-06-06 Fet bias voltage supplying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7686980A JPS573405A (en) 1980-06-06 1980-06-06 Fet bias voltage supplying circuit

Publications (1)

Publication Number Publication Date
JPS573405A true JPS573405A (en) 1982-01-08

Family

ID=13617643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7686980A Pending JPS573405A (en) 1980-06-06 1980-06-06 Fet bias voltage supplying circuit

Country Status (1)

Country Link
JP (1) JPS573405A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5756347A (en) * 1980-08-19 1982-04-03 Anvar Fluoride glass and manufacture
JPH01240916A (en) * 1988-03-22 1989-09-26 Fujitsu Ltd Fet bias voltage supply circuit
EP1605586A1 (en) * 2004-06-10 2005-12-14 Kabushiki Kaisha Toshiba Semiconductor amplifier

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS551046U (en) * 1979-01-31 1980-01-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS551046U (en) * 1979-01-31 1980-01-07

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5756347A (en) * 1980-08-19 1982-04-03 Anvar Fluoride glass and manufacture
JPH01240916A (en) * 1988-03-22 1989-09-26 Fujitsu Ltd Fet bias voltage supply circuit
EP1605586A1 (en) * 2004-06-10 2005-12-14 Kabushiki Kaisha Toshiba Semiconductor amplifier
US7262668B2 (en) 2004-06-10 2007-08-28 Kabushiki Kaisha Toshiba Semiconductor amplifier
US7423491B2 (en) 2004-06-10 2008-09-09 Kabushiki Kaisha Toshiba Semiconductor amplifier

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