JPS5710596A - Speaker driving circuit - Google Patents

Speaker driving circuit

Info

Publication number
JPS5710596A
JPS5710596A JP8369680A JP8369680A JPS5710596A JP S5710596 A JPS5710596 A JP S5710596A JP 8369680 A JP8369680 A JP 8369680A JP 8369680 A JP8369680 A JP 8369680A JP S5710596 A JPS5710596 A JP S5710596A
Authority
JP
Japan
Prior art keywords
signal
trs
base
inputted
turned
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
JP8369680A
Other languages
Japanese (ja)
Inventor
Koichi Oota
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch 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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP8369680A priority Critical patent/JPS5710596A/en
Publication of JPS5710596A publication Critical patent/JPS5710596A/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)
  • Electromechanical Clocks (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To reduce consumption of a battery of an electronic by connecting an MOS transistor for selectively biasing a transistor in the forward direction or in the reverse direction in accordance with a state of a signal, to an input terminal of a speaker driving transistor. CONSTITUTION:When an acoustic input signal (b) has been inputted to a speaker driving circuit, an H level is inputted to a signal (a), MOS transistors TrT34, T35 are turned on, TrT33, T36 are turned off, and a base current which is required for making a constant collector current flow is supplied to a base of driving Trs T31, T32 through an internal resistances of Trs T35, T34 from electric power sources E31, E32. Accordingly, only when it is necessary to pronounce, the signal (b) is amplified and a speaker S31 is driven. On the other hand, when it is unnecessary to pronounce, an L level is inputted to the signal (a), Trs T34, T35 are turned off, a base current which has been supplied to a base of Trs T31, T32 is cut off, and a collector current is made a collector leak current only.
JP8369680A 1980-06-20 1980-06-20 Speaker driving circuit Pending JPS5710596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8369680A JPS5710596A (en) 1980-06-20 1980-06-20 Speaker driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8369680A JPS5710596A (en) 1980-06-20 1980-06-20 Speaker driving circuit

Publications (1)

Publication Number Publication Date
JPS5710596A true JPS5710596A (en) 1982-01-20

Family

ID=13809653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8369680A Pending JPS5710596A (en) 1980-06-20 1980-06-20 Speaker driving circuit

Country Status (1)

Country Link
JP (1) JPS5710596A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50105252A (en) * 1974-01-24 1975-08-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50105252A (en) * 1974-01-24 1975-08-19

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