JPS5781709A - Input switching amplifier - Google Patents

Input switching amplifier

Info

Publication number
JPS5781709A
JPS5781709A JP55157875A JP15787580A JPS5781709A JP S5781709 A JPS5781709 A JP S5781709A JP 55157875 A JP55157875 A JP 55157875A JP 15787580 A JP15787580 A JP 15787580A JP S5781709 A JPS5781709 A JP S5781709A
Authority
JP
Japan
Prior art keywords
circuit
level
switching
control signal
gentle
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
JP55157875A
Other languages
Japanese (ja)
Other versions
JPH0247124B2 (en
Inventor
Takuzo Kamimura
Junichi Hikita
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.)
TOUYOU DENGU SEISAKUSHO KK
Rohm Co Ltd
Original Assignee
TOUYOU DENGU SEISAKUSHO KK
Rohm Co Ltd
Toyo Electronics Industry 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 TOUYOU DENGU SEISAKUSHO KK, Rohm Co Ltd, Toyo Electronics Industry Corp filed Critical TOUYOU DENGU SEISAKUSHO KK
Priority to JP55157875A priority Critical patent/JPS5781709A/en
Publication of JPS5781709A publication Critical patent/JPS5781709A/en
Publication of JPH0247124B2 publication Critical patent/JPH0247124B2/ja
Granted 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Electronic Switches (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To prevent the occurrence of an abnormal sound caused by a switching action, by converting the level of a switch control signal into a gentle level and then switching an amplifier with the control signal received a level conversion. CONSTITUTION:A switching circuit 24 controls the driving current to be supplied to amplifiers 22A and 22B and switches selectively the working of these amplifiers. A time constant circuit 59 converts the level of a switch control circuit transmitted from a switch control circuit 60 into a gentle change, e.g. a ramp function. Thus the input level of the control signal transmitted from the circuit 60 is converted into a gentle level through the circuit 59. As a result, the switching action of the circuit 24 becomes smooth to prevent a shock noise caused by a sudden switching action.
JP55157875A 1980-11-10 1980-11-10 Input switching amplifier Granted JPS5781709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55157875A JPS5781709A (en) 1980-11-10 1980-11-10 Input switching amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55157875A JPS5781709A (en) 1980-11-10 1980-11-10 Input switching amplifier

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP3212794A Division JPH05136634A (en) 1991-07-30 1991-07-30 Input switching amplifier circuit

Publications (2)

Publication Number Publication Date
JPS5781709A true JPS5781709A (en) 1982-05-21
JPH0247124B2 JPH0247124B2 (en) 1990-10-18

Family

ID=15659312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55157875A Granted JPS5781709A (en) 1980-11-10 1980-11-10 Input switching amplifier

Country Status (1)

Country Link
JP (1) JPS5781709A (en)

Also Published As

Publication number Publication date
JPH0247124B2 (en) 1990-10-18

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