JPS56168417A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS56168417A
JPS56168417A JP7238480A JP7238480A JPS56168417A JP S56168417 A JPS56168417 A JP S56168417A JP 7238480 A JP7238480 A JP 7238480A JP 7238480 A JP7238480 A JP 7238480A JP S56168417 A JPS56168417 A JP S56168417A
Authority
JP
Japan
Prior art keywords
resistor
base
constant level
level
output
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
JP7238480A
Other languages
Japanese (ja)
Other versions
JPS6228890B2 (en
Inventor
Katsuaki Sumi
Hajime Takano
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 JP7238480A priority Critical patent/JPS56168417A/en
Publication of JPS56168417A publication Critical patent/JPS56168417A/en
Publication of JPS6228890B2 publication Critical patent/JPS6228890B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/002—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general without controlling loop

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To prevent a locking phenomenon and to avoid the unstableness of an AGC loop, by holding almost a constant level for an output signal when the level of the input signal of an amplifier becomes higher than a prescribed value. CONSTITUTION:The two diodes 5 and 6 connected in series in the forward direction are connected in parallel to a load resistor 12, and point (a), i.e. an end of the resistor 12 is connected to the base of an output transistor TR3 via a current suppressing resistor 15. The quantity of the current flowing to the collector of the TR1 form the base of the TR3 is very small even though the emitter-base voltage VEB of the TR3 varies if the resistance value of the resistor 15 is sufficiently large. As a result, almost a constant level is secured for the output voltage VO.
JP7238480A 1980-05-29 1980-05-29 Amplifier Granted JPS56168417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7238480A JPS56168417A (en) 1980-05-29 1980-05-29 Amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7238480A JPS56168417A (en) 1980-05-29 1980-05-29 Amplifier

Publications (2)

Publication Number Publication Date
JPS56168417A true JPS56168417A (en) 1981-12-24
JPS6228890B2 JPS6228890B2 (en) 1987-06-23

Family

ID=13487728

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7238480A Granted JPS56168417A (en) 1980-05-29 1980-05-29 Amplifier

Country Status (1)

Country Link
JP (1) JPS56168417A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008141358A (en) 2006-11-30 2008-06-19 Mitsumi Electric Co Ltd Variable gain amplifier circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008141358A (en) 2006-11-30 2008-06-19 Mitsumi Electric Co Ltd Variable gain amplifier circuit

Also Published As

Publication number Publication date
JPS6228890B2 (en) 1987-06-23

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