JPS57199396A - Speaker input controlling circuit - Google Patents

Speaker input controlling circuit

Info

Publication number
JPS57199396A
JPS57199396A JP8518481A JP8518481A JPS57199396A JP S57199396 A JPS57199396 A JP S57199396A JP 8518481 A JP8518481 A JP 8518481A JP 8518481 A JP8518481 A JP 8518481A JP S57199396 A JPS57199396 A JP S57199396A
Authority
JP
Japan
Prior art keywords
output
comparator
amplifier
input
hpf2
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
JP8518481A
Other languages
Japanese (ja)
Inventor
Shintaro Hirose
Yasushi Miyoshi
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP8518481A priority Critical patent/JPS57199396A/en
Publication of JPS57199396A publication Critical patent/JPS57199396A/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
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To slove problems at large input and to extend low sound reproducing region, by providing a feedback variable means changing an output being a feedback signal to an amplifier in response to an output of a comparator. CONSTITUTION:A voltage applied to an amplifier 1 is amplified and the output is applied to an HPF2. The HPF2 has the same characteristics as a speaker connected to the amplifier 1 and the output of the HPF2 and the input of the amplifier 1 are compared at a comparator 3. The output of the comparator 3 is fed back to the amplifier 1 via a feedback amount variable means 4. The gain of the means 4 is changed in response to the magnitude of the output of the comparator 3 to be the input; for example, when the output of the comparator 3 is larger, the feedback amount is decreased and when the output of the comparator 3 is smaller, the amount is increased. Thus, problems such as clip can be solved at large input and the extension of low sound reproducing region can be made for normal input.
JP8518481A 1981-06-02 1981-06-02 Speaker input controlling circuit Pending JPS57199396A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8518481A JPS57199396A (en) 1981-06-02 1981-06-02 Speaker input controlling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8518481A JPS57199396A (en) 1981-06-02 1981-06-02 Speaker input controlling circuit

Publications (1)

Publication Number Publication Date
JPS57199396A true JPS57199396A (en) 1982-12-07

Family

ID=13851569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8518481A Pending JPS57199396A (en) 1981-06-02 1981-06-02 Speaker input controlling circuit

Country Status (1)

Country Link
JP (1) JPS57199396A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6118618U (en) * 1984-07-10 1986-02-03 株式会社東芝 Amplifier automatic gain control circuit
US4868870A (en) * 1985-10-01 1989-09-19 Schrader Daniel J Servo-controlled amplifier and method for compensating for transducer nonlinearities
US5523715A (en) * 1995-03-10 1996-06-04 Schrader; Daniel J. Amplifier arrangement and method and voltage controlled amplifier and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6118618U (en) * 1984-07-10 1986-02-03 株式会社東芝 Amplifier automatic gain control circuit
US4868870A (en) * 1985-10-01 1989-09-19 Schrader Daniel J Servo-controlled amplifier and method for compensating for transducer nonlinearities
US5523715A (en) * 1995-03-10 1996-06-04 Schrader; Daniel J. Amplifier arrangement and method and voltage controlled amplifier and method

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