JPS55147010A - Preamplifier for electrostatic type electro-acoustic converter - Google Patents

Preamplifier for electrostatic type electro-acoustic converter

Info

Publication number
JPS55147010A
JPS55147010A JP5260380A JP5260380A JPS55147010A JP S55147010 A JPS55147010 A JP S55147010A JP 5260380 A JP5260380 A JP 5260380A JP 5260380 A JP5260380 A JP 5260380A JP S55147010 A JPS55147010 A JP S55147010A
Authority
JP
Japan
Prior art keywords
dynamic range
fet41
fet31
small
constitution
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
JP5260380A
Other languages
Japanese (ja)
Other versions
JPS5613043B2 (en
Inventor
Takeshi Matsudaira
Osamu Kono
Makoto Ishikawa
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 JP5260380A priority Critical patent/JPS55147010A/en
Publication of JPS55147010A publication Critical patent/JPS55147010A/en
Publication of JPS5613043B2 publication Critical patent/JPS5613043B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H03F3/185—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
    • H03F3/1855—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices with junction-FET devices

Landscapes

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

Abstract

PURPOSE:To extend the dynamic range, by connecting a pair of FETs of complementary constitution having small gate leakage current to the source follower and connecting the load circuit of high input impedance to the output. CONSTITUTION:As the complementary FET31, 32, small gate leakage current IG, small drain current IDSS when the voltage between the gate and source is zero, are selected and as FET41, 42 of the post stage, greater current IDSS is selected. With this constitution, since the load of FET31, 32 is FET41 of the source follower, the load impedance is high and the dynamic range is broad even with small current IDSS of FET31, 32. Further, in this case, since greater current IDSS is used for FET41, 42, the dynamic range is broad even with low load impedance. Accordingly, the dynamic range as a whole is greatly extended.
JP5260380A 1980-04-21 1980-04-21 Preamplifier for electrostatic type electro-acoustic converter Granted JPS55147010A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5260380A JPS55147010A (en) 1980-04-21 1980-04-21 Preamplifier for electrostatic type electro-acoustic converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5260380A JPS55147010A (en) 1980-04-21 1980-04-21 Preamplifier for electrostatic type electro-acoustic converter

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP8156972A Division JPS5612049B2 (en) 1972-03-02 1972-08-15

Publications (2)

Publication Number Publication Date
JPS55147010A true JPS55147010A (en) 1980-11-15
JPS5613043B2 JPS5613043B2 (en) 1981-03-26

Family

ID=12919356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5260380A Granted JPS55147010A (en) 1980-04-21 1980-04-21 Preamplifier for electrostatic type electro-acoustic converter

Country Status (1)

Country Link
JP (1) JPS55147010A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4472729A (en) * 1981-08-31 1984-09-18 Tokyo Shibaura Denki Kabushiki Kaisha Recrystallized three dimensional integrated circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4472729A (en) * 1981-08-31 1984-09-18 Tokyo Shibaura Denki Kabushiki Kaisha Recrystallized three dimensional integrated circuit

Also Published As

Publication number Publication date
JPS5613043B2 (en) 1981-03-26

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