JPS5773593A - Switching circuit of speaker - Google Patents

Switching circuit of speaker

Info

Publication number
JPS5773593A
JPS5773593A JP14913680A JP14913680A JPS5773593A JP S5773593 A JPS5773593 A JP S5773593A JP 14913680 A JP14913680 A JP 14913680A JP 14913680 A JP14913680 A JP 14913680A JP S5773593 A JPS5773593 A JP S5773593A
Authority
JP
Japan
Prior art keywords
speaker
switching element
semiconductor switching
turning
switch
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
JP14913680A
Other languages
Japanese (ja)
Inventor
Shunichi Orita
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.)
Olympus Corp
Original Assignee
Olympus Corp
Olympus Optical Co 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 Olympus Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP14913680A priority Critical patent/JPS5773593A/en
Publication of JPS5773593A publication Critical patent/JPS5773593A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To reduce the current consumption of a switching element by using a semiconductor switching element for a switching element to turn on/off a speaker and turning on/off the speaker with a control bias. CONSTITUTION:When a speaker 15 built in a cassette tape recorder is to use as an alarm speaker informing the end of the tape at recording, a switch 19 is closed. As the result, bias current flows into a pair of transistors 16a and 16b connected in reverse parallel through driving resistors 17 and 18 and a semiconductor switching element 16 is connected, turning on the speaker 15. To check the generation of alarm sound, the switch 19 is closed, so that the semiconductor switching element 16 is disconnected and the speaker 15 is turned off.
JP14913680A 1980-10-24 1980-10-24 Switching circuit of speaker Pending JPS5773593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14913680A JPS5773593A (en) 1980-10-24 1980-10-24 Switching circuit of speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14913680A JPS5773593A (en) 1980-10-24 1980-10-24 Switching circuit of speaker

Publications (1)

Publication Number Publication Date
JPS5773593A true JPS5773593A (en) 1982-05-08

Family

ID=15468527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14913680A Pending JPS5773593A (en) 1980-10-24 1980-10-24 Switching circuit of speaker

Country Status (1)

Country Link
JP (1) JPS5773593A (en)

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