JPS56149896A - Driving circuit of speaker - Google Patents

Driving circuit of speaker

Info

Publication number
JPS56149896A
JPS56149896A JP5296080A JP5296080A JPS56149896A JP S56149896 A JPS56149896 A JP S56149896A JP 5296080 A JP5296080 A JP 5296080A JP 5296080 A JP5296080 A JP 5296080A JP S56149896 A JPS56149896 A JP S56149896A
Authority
JP
Japan
Prior art keywords
signal
waveform
input signal
signal waveform
case
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
JP5296080A
Other languages
Japanese (ja)
Inventor
Yasuaki Awanaka
Atsushi Sasaki
Masaharu Kobayashi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5296080A priority Critical patent/JPS56149896A/en
Publication of JPS56149896A publication Critical patent/JPS56149896A/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
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Landscapes

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

Abstract

PURPOSE:To obtain an output waveform which is faithful to the waveform of an input signal, by paying special attention to a transient state of the amplitude variation such as leading edge, trailing edge, etc. of the input signal. CONSTITUTION:In case when an envelope of an output signal waveform A is compared with that of an input signal waveform, as for the leading edge, unless it follows the input signal, a signal waveform B is formed. Also, in case when a level of the output signal is higher than that of the input signal, a signal waveform C is formed. The signal of said signal waveform B and C is made a control signal, the automatic gain control circuit is operated, and a signal waveform D is obtained. As far as this example is concerned, the leading edge part of amplitude is amplified, and the trailing edge part is attenuated. In this way, in case when the amplitude is varied in time, the amplifying operation is generated, and as for a steady signal which is not varied in time, there is no amplifying operation.
JP5296080A 1980-04-23 1980-04-23 Driving circuit of speaker Pending JPS56149896A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5296080A JPS56149896A (en) 1980-04-23 1980-04-23 Driving circuit of speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5296080A JPS56149896A (en) 1980-04-23 1980-04-23 Driving circuit of speaker

Publications (1)

Publication Number Publication Date
JPS56149896A true JPS56149896A (en) 1981-11-19

Family

ID=12929450

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5296080A Pending JPS56149896A (en) 1980-04-23 1980-04-23 Driving circuit of speaker

Country Status (1)

Country Link
JP (1) JPS56149896A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007020104A1 (en) * 2005-08-18 2007-02-22 Stamer Musikanlagen Gmbh Device for reproducing audio signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007020104A1 (en) * 2005-08-18 2007-02-22 Stamer Musikanlagen Gmbh Device for reproducing audio signals

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