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JPS5620317A - Automatic level variable circuit - Google Patents

Automatic level variable circuit

Info

Publication number
JPS5620317A
JPS5620317A JP9632079A JP9632079A JPS5620317A JP S5620317 A JPS5620317 A JP S5620317A JP 9632079 A JP9632079 A JP 9632079A JP 9632079 A JP9632079 A JP 9632079A JP S5620317 A JPS5620317 A JP S5620317A
Authority
JP
Japan
Prior art keywords
voltage
circuit
variable circuit
automatic level
level variable
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
JP9632079A
Other languages
Japanese (ja)
Inventor
Keiji Murakami
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 JP9632079A priority Critical patent/JPS5620317A/en
Publication of JPS5620317A publication Critical patent/JPS5620317A/en
Pending legal-status Critical Current

Links

Classifications

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

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To vary a desired output level automatically at a set time by presetting the output voltage of a memory element, applied with a DC control voltage, to a voltage control variable attenuating circuit and by setting the operation time of the circuit by a timer. CONSTITUTION:Voltage control variable attenuating circuit 2 has its attenuation of input signal 6 controlled by DC control voltage (j). Voltage (j) to this circuit 2 is supplied through memory element 19 and voltage Vi initially set by preset circuits 12 and 13 and voltage Vc setting the operation time of the circuit by timer 11 are applied to element 19. Consequently, a desired output level can automatically be varied at a set time.
JP9632079A 1979-07-28 1979-07-28 Automatic level variable circuit Pending JPS5620317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9632079A JPS5620317A (en) 1979-07-28 1979-07-28 Automatic level variable circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9632079A JPS5620317A (en) 1979-07-28 1979-07-28 Automatic level variable circuit

Publications (1)

Publication Number Publication Date
JPS5620317A true JPS5620317A (en) 1981-02-25

Family

ID=14161719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9632079A Pending JPS5620317A (en) 1979-07-28 1979-07-28 Automatic level variable circuit

Country Status (1)

Country Link
JP (1) JPS5620317A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5856510A (en) * 1981-09-30 1983-04-04 Fujitsu Ltd Automatic control system for transmitted sound volume
JPS63272112A (en) * 1987-04-30 1988-11-09 Sanyo Electric Co Ltd Signal switching device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5856510A (en) * 1981-09-30 1983-04-04 Fujitsu Ltd Automatic control system for transmitted sound volume
JPS63272112A (en) * 1987-04-30 1988-11-09 Sanyo Electric Co Ltd Signal switching device

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