JPS56144609A - Protective device for multiple-power-source power amplifying circuit - Google Patents

Protective device for multiple-power-source power amplifying circuit

Info

Publication number
JPS56144609A
JPS56144609A JP4751980A JP4751980A JPS56144609A JP S56144609 A JPS56144609 A JP S56144609A JP 4751980 A JP4751980 A JP 4751980A JP 4751980 A JP4751980 A JP 4751980A JP S56144609 A JPS56144609 A JP S56144609A
Authority
JP
Japan
Prior art keywords
resistance
output
power source
diode
protective device
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
JP4751980A
Other languages
Japanese (ja)
Other versions
JPS6353728B2 (en
Inventor
Kazumasa Sakai
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.)
TRIO KENWOOD CORP
Kenwood KK
Original Assignee
TRIO KENWOOD CORP
Kenwood KK
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 TRIO KENWOOD CORP, Kenwood KK filed Critical TRIO KENWOOD CORP
Priority to JP4751980A priority Critical patent/JPS56144609A/en
Publication of JPS56144609A publication Critical patent/JPS56144609A/en
Publication of JPS6353728B2 publication Critical patent/JPS6353728B2/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
    • H03F1/52—Circuit arrangements for protecting such amplifiers

Landscapes

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

Abstract

PURPOSE:To prevent a sound from being ceased completely owing to protecting operation, by decreasing a maximum output in case of an overload. CONSTITUTION:To detect a supply current from power source E1 to load 6 via output transistor TR2, resistance 8 is connected between diode 1 and power source E1, and protective TR10 for the protection by turning off output TR4 diode 9 is also connected between the base of output TR4 and the common connection point of diode 1 and resistance 8. Further, resistances 11 and 12 are connected to divide the voltage drop across resistance 8 due to the supply current from power source E1 to output TR2, and a voltage applied to resistance 12 is applied as an input to protective TR10. In addition, capacitor 14 is connected in parallel to resistance 12 to hold the voltage applied to resistance 12 for a certain time. Furthermore, a similar protective device is provided to the path for the current supply from power source E2 to output TR4.
JP4751980A 1980-04-11 1980-04-11 Protective device for multiple-power-source power amplifying circuit Granted JPS56144609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4751980A JPS56144609A (en) 1980-04-11 1980-04-11 Protective device for multiple-power-source power amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4751980A JPS56144609A (en) 1980-04-11 1980-04-11 Protective device for multiple-power-source power amplifying circuit

Publications (2)

Publication Number Publication Date
JPS56144609A true JPS56144609A (en) 1981-11-11
JPS6353728B2 JPS6353728B2 (en) 1988-10-25

Family

ID=12777352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4751980A Granted JPS56144609A (en) 1980-04-11 1980-04-11 Protective device for multiple-power-source power amplifying circuit

Country Status (1)

Country Link
JP (1) JPS56144609A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215107A (en) * 1982-06-09 1983-12-14 Matsushita Electric Ind Co Ltd Power amplifier
JPS5911012A (en) * 1982-07-10 1984-01-20 Matsushita Electric Ind Co Ltd Power amplifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58215107A (en) * 1982-06-09 1983-12-14 Matsushita Electric Ind Co Ltd Power amplifier
JPS5911012A (en) * 1982-07-10 1984-01-20 Matsushita Electric Ind Co Ltd Power amplifier

Also Published As

Publication number Publication date
JPS6353728B2 (en) 1988-10-25

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