JPS57118495A - Speaker device - Google Patents

Speaker device

Info

Publication number
JPS57118495A
JPS57118495A JP482181A JP482181A JPS57118495A JP S57118495 A JPS57118495 A JP S57118495A JP 482181 A JP482181 A JP 482181A JP 482181 A JP482181 A JP 482181A JP S57118495 A JPS57118495 A JP S57118495A
Authority
JP
Japan
Prior art keywords
windings
digital signal
coil
opposite
diaphragm
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
JP482181A
Other languages
Japanese (ja)
Inventor
Satoshi Endo
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP482181A priority Critical patent/JPS57118495A/en
Publication of JPS57118495A publication Critical patent/JPS57118495A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/005—Details of transducers, loudspeakers or microphones using digitally weighted transducing elements

Abstract

PURPOSE:To obtain an aural output directly from the digital signal, by providing plural units of the drive winding to drive a diaphragm in accordance with the number of bits of the input digital signal. CONSTITUTION:A motor-driven speaker 1 consists of a speaker cone 2 which functions as a diaphragm, a voice coil 3 connected to the cone 2, a permanent magnet 4 which functions as a stator magnet set opposite to the coil 3 and a stator 5 which forms a magnetic circuit. The coil 3 contains windings 3a, 3b and 3c to be opposite to each bit of the 3-bit digital signal. The winding 3a is set opposite to an LSB with the number of turns set at 1, and the number of turns is set for the windings as 3a:3b:3c=1:2:4. These windings are connected between an earth and a constant voltage source through switches 7a, 7b and 7c which are turned on and off by the bits a1, a2 and a3 of the digital input signal (a) plus a switch 8 for deglitch respectively. In such way, an aural output which requires no analog part is obtained.
JP482181A 1981-01-13 1981-01-13 Speaker device Pending JPS57118495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP482181A JPS57118495A (en) 1981-01-13 1981-01-13 Speaker device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP482181A JPS57118495A (en) 1981-01-13 1981-01-13 Speaker device

Publications (1)

Publication Number Publication Date
JPS57118495A true JPS57118495A (en) 1982-07-23

Family

ID=11594372

Family Applications (1)

Application Number Title Priority Date Filing Date
JP482181A Pending JPS57118495A (en) 1981-01-13 1981-01-13 Speaker device

Country Status (1)

Country Link
JP (1) JPS57118495A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076899A (en) * 1983-09-15 1985-05-01 エヌ・ベー・フイリツプス・フルーイランペンフアブリケン Speaker unit for converting n-bit digitized electric signal to acoustic signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076899A (en) * 1983-09-15 1985-05-01 エヌ・ベー・フイリツプス・フルーイランペンフアブリケン Speaker unit for converting n-bit digitized electric signal to acoustic signal

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