JPS6449409A - Bias circuit for field effect transistor - Google Patents

Bias circuit for field effect transistor

Info

Publication number
JPS6449409A
JPS6449409A JP20517787A JP20517787A JPS6449409A JP S6449409 A JPS6449409 A JP S6449409A JP 20517787 A JP20517787 A JP 20517787A JP 20517787 A JP20517787 A JP 20517787A JP S6449409 A JPS6449409 A JP S6449409A
Authority
JP
Japan
Prior art keywords
voltage
gate
source
negative
impressing
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
JP20517787A
Other languages
Japanese (ja)
Inventor
Toshio Saikai
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
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 filed Critical NEC Corp
Priority to JP20517787A priority Critical patent/JPS6449409A/en
Publication of JPS6449409A publication Critical patent/JPS6449409A/en
Pending legal-status Critical Current

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  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To form a bias circuit by one power source, by supplying a voltage voltage-divided by a bleeder resistor connected to the source of a dual gate FET to a first gate, and impressing the voltage having the same polarity as that of a drain voltage and lower than a source voltage on a second gate. CONSTITUTION:By impressing a positive voltage +V on a drain voltage terminal 2, the voltage in which the source voltage is voltage-divided by resistors 7 and 8 is impressed on a first gate voltage terminal 3. Therefore, a bias voltage set as a negative voltage relatively compared with the source voltage is supplied to the first gate. Also, the positive voltage set as a negative one relatively for the source voltage is supplied to a second gate voltage terminal 4. Consequently, by supplying the negative voltage to the first gate by self-biasing, and impressing a relatively negative voltage on the second gate, it is possible to realize the gain control of a FET amplifier by a single positive voltage source.
JP20517787A 1987-08-20 1987-08-20 Bias circuit for field effect transistor Pending JPS6449409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20517787A JPS6449409A (en) 1987-08-20 1987-08-20 Bias circuit for field effect transistor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20517787A JPS6449409A (en) 1987-08-20 1987-08-20 Bias circuit for field effect transistor

Publications (1)

Publication Number Publication Date
JPS6449409A true JPS6449409A (en) 1989-02-23

Family

ID=16502698

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20517787A Pending JPS6449409A (en) 1987-08-20 1987-08-20 Bias circuit for field effect transistor

Country Status (1)

Country Link
JP (1) JPS6449409A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5710531A (en) * 1996-05-29 1998-01-20 Abolafia; Andrew Static field converter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5760713A (en) * 1980-09-27 1982-04-12 Matsushita Electric Ind Co Ltd Amplifying device
JPS6430311A (en) * 1987-07-27 1989-02-01 Matsushita Electric Ind Co Ltd Amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5760713A (en) * 1980-09-27 1982-04-12 Matsushita Electric Ind Co Ltd Amplifying device
JPS6430311A (en) * 1987-07-27 1989-02-01 Matsushita Electric Ind Co Ltd Amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5710531A (en) * 1996-05-29 1998-01-20 Abolafia; Andrew Static field converter

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