JPS5579509A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS5579509A
JPS5579509A JP15445778A JP15445778A JPS5579509A JP S5579509 A JPS5579509 A JP S5579509A JP 15445778 A JP15445778 A JP 15445778A JP 15445778 A JP15445778 A JP 15445778A JP S5579509 A JPS5579509 A JP S5579509A
Authority
JP
Japan
Prior art keywords
gate
capacitor
diode
drain current
resistance
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
JP15445778A
Other languages
Japanese (ja)
Inventor
Takahiro Yokota
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15445778A priority Critical patent/JPS5579509A/en
Publication of JPS5579509A publication Critical patent/JPS5579509A/en
Pending 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0261—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the polarisation voltage or current, e.g. gliding Class A

Abstract

PURPOSE:To reduce power consumption by nearly eliminating a drain current while no signal arrives, by connecting a parallel circuit of a diode and resistance between the gate and source of an amplifier composed of enhancement MOSFET. CONSTITUTION:Between the gate and source of enhancement MOSFETQ, a parallel circuit of diode D and resistance R is connected and between input terminal IN and gate, capacitor C1 is also connected. Once a signal is inputted to terminal IN, a drain current equivalent to it flows and at output terminal OUT, a signal appears which has been amplified via capacitor C2. At this time, capacitor C1 is changed via diode D and a voltage biasing the gate forward is developed. With no input signal, the charging voltage of capacitor C1 is discharged via resistance R, and consequently since the gate-bias voltage becomes zero, no drain current flows and power consumption at this time can remarkably be reduced.
JP15445778A 1978-12-13 1978-12-13 Amplifier Pending JPS5579509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15445778A JPS5579509A (en) 1978-12-13 1978-12-13 Amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15445778A JPS5579509A (en) 1978-12-13 1978-12-13 Amplifier

Publications (1)

Publication Number Publication Date
JPS5579509A true JPS5579509A (en) 1980-06-16

Family

ID=15584640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15445778A Pending JPS5579509A (en) 1978-12-13 1978-12-13 Amplifier

Country Status (1)

Country Link
JP (1) JPS5579509A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59123302A (en) * 1982-12-29 1984-07-17 Seiko Epson Corp Low frequency amplifier circuit
JPS59167185A (en) * 1983-03-11 1984-09-20 Hitachi Ltd Signal read circuit of solid-state device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59123302A (en) * 1982-12-29 1984-07-17 Seiko Epson Corp Low frequency amplifier circuit
JPS59167185A (en) * 1983-03-11 1984-09-20 Hitachi Ltd Signal read circuit of solid-state device
JPH059988B2 (en) * 1983-03-11 1993-02-08 Hitachi Ltd

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