JPS5489553A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS5489553A
JPS5489553A JP15991277A JP15991277A JPS5489553A JP S5489553 A JPS5489553 A JP S5489553A JP 15991277 A JP15991277 A JP 15991277A JP 15991277 A JP15991277 A JP 15991277A JP S5489553 A JPS5489553 A JP S5489553A
Authority
JP
Japan
Prior art keywords
amplifying stage
output
volt
drain current
negative
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
JP15991277A
Other languages
Japanese (ja)
Other versions
JPS5616562B2 (en
Inventor
Tsutomu Sugawara
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15991277A priority Critical patent/JPS5489553A/en
Publication of JPS5489553A publication Critical patent/JPS5489553A/en
Publication of JPS5616562B2 publication Critical patent/JPS5616562B2/ja
Granted 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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback

Landscapes

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

Abstract

PURPOSE:To make easy low noise constitution, by keeping the operating point of FET near the saturation drain current at all times, by performing negative feedback the second amplifying stage from the output of the third amplifying stage and by picking up the output of the second amplifying stage at the output terminal. CONSTITUTION:The output of the second amplifying stage 22 is picked up at the output terminal 2 and it is negative-fed back to the input side of the second amplifying stage 22 via the third amplifying stage 23 of low pass type. Thus, the output voltage of the second amplifying stage 22 is almost kept at 0 volt. Accordingly, the voltage dividing this output voltage with the resistors 8 and 14 is almost kept at 0 volt. Since this is negative fed back to the source electrode S of the field effect transistor 5, the gate-to-source voltage VGS is controlled at about 0 volt. As a result, since the transistor 5 is of depletion type, the drain current, that is the operating point, can almost be set to the saturation drain current. Accordingly, low noise configuration can be made easily.
JP15991277A 1977-12-27 1977-12-27 Amplifier Granted JPS5489553A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15991277A JPS5489553A (en) 1977-12-27 1977-12-27 Amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15991277A JPS5489553A (en) 1977-12-27 1977-12-27 Amplifier

Publications (2)

Publication Number Publication Date
JPS5489553A true JPS5489553A (en) 1979-07-16
JPS5616562B2 JPS5616562B2 (en) 1981-04-17

Family

ID=15703868

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15991277A Granted JPS5489553A (en) 1977-12-27 1977-12-27 Amplifier

Country Status (1)

Country Link
JP (1) JPS5489553A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769305U (en) * 1980-10-13 1982-04-26

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELECTRONIC ENGINEERING#V41#N511#M9=1970 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769305U (en) * 1980-10-13 1982-04-26

Also Published As

Publication number Publication date
JPS5616562B2 (en) 1981-04-17

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