JPS55109010A - Level control circuit - Google Patents

Level control circuit

Info

Publication number
JPS55109010A
JPS55109010A JP1655579A JP1655579A JPS55109010A JP S55109010 A JPS55109010 A JP S55109010A JP 1655579 A JP1655579 A JP 1655579A JP 1655579 A JP1655579 A JP 1655579A JP S55109010 A JPS55109010 A JP S55109010A
Authority
JP
Japan
Prior art keywords
level control
amplifier
plus
control
att2
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
JP1655579A
Other languages
Japanese (ja)
Other versions
JPS6161287B2 (en
Inventor
Yamato Okashin
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP1655579A priority Critical patent/JPS55109010A/en
Publication of JPS55109010A publication Critical patent/JPS55109010A/en
Publication of JPS6161287B2 publication Critical patent/JPS6161287B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To obtain a level control circuit which features a wide control range with no increment of the signal distortion by forming part of plural number of level control circuits connected vertically into the delay type. CONSTITUTION:The input signal applied through terminal T1 is applied to amplifier 4 via attenuator ATT1 comprising transistors TrQ1 and Q2 plus resistance R1. attenuator ATT2 comprising TrQ3 and Q4 plus resistance R2 plus pre-amplifier 3 comprising TrQ11-Q18 each. The control signal production circuit consisting or TrQ21-Q26 vary the collector current of TrQ22, Q25 and Q26 each through the operation of level control variable resistance R21. And these current variation give the control to the attenuation amount of ATT1 and 2 as well as the amplification factor of pre-amplifier 3. The level control of ATT2 and amplifier 3 feature the delay type, and thus the entire characteristics can be made special like the D-type or the like.
JP1655579A 1979-02-15 1979-02-15 Level control circuit Granted JPS55109010A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1655579A JPS55109010A (en) 1979-02-15 1979-02-15 Level control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1655579A JPS55109010A (en) 1979-02-15 1979-02-15 Level control circuit

Publications (2)

Publication Number Publication Date
JPS55109010A true JPS55109010A (en) 1980-08-21
JPS6161287B2 JPS6161287B2 (en) 1986-12-25

Family

ID=11919515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1655579A Granted JPS55109010A (en) 1979-02-15 1979-02-15 Level control circuit

Country Status (1)

Country Link
JP (1) JPS55109010A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007282234A (en) * 2006-04-05 2007-10-25 Xignal Technologies Ag Low-noise amplifier of low current consumption

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007282234A (en) * 2006-04-05 2007-10-25 Xignal Technologies Ag Low-noise amplifier of low current consumption
JP4669493B2 (en) * 2006-04-05 2011-04-13 ナショナル セミコンダクタ ジャーマニー アクチエンゲゼルシャフト Low noise amplifier with low current consumption

Also Published As

Publication number Publication date
JPS6161287B2 (en) 1986-12-25

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