JPS57119503A - Generating circuit for control signal - Google Patents

Generating circuit for control signal

Info

Publication number
JPS57119503A
JPS57119503A JP56005553A JP555381A JPS57119503A JP S57119503 A JPS57119503 A JP S57119503A JP 56005553 A JP56005553 A JP 56005553A JP 555381 A JP555381 A JP 555381A JP S57119503 A JPS57119503 A JP S57119503A
Authority
JP
Japan
Prior art keywords
control signal
input
voltage
capacitor
current
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
JP56005553A
Other languages
Japanese (ja)
Inventor
Tomoyuki Kawabata
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP56005553A priority Critical patent/JPS57119503A/en
Publication of JPS57119503A publication Critical patent/JPS57119503A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

PURPOSE:To generate a control signal which has excellent rising characteristics to an increase in AC input in accordance with the terminal voltage of a capacitor, by charging or discharging the capacitor rapidly by converting a current, obtained by rectifying an AC input, into a voltage. CONSTITUTION:A rectifying circuit 14 processes an AC input voltage Vin from an input terminal 12 by full-wave rectification to generate a current output IR. A charge and discharge control circuit 18 converts said current output IR into a voltage at a current-voltage conversion part 18A to charge a capacitor 16 rapidly and also to discharge it graudually. An output circuit 20 generates a control signal consisting of a current IG which corresponds to the terminal voltage of the capacitor 16. Thus, the control signal has excellent rising characteristics to an increase in AC input.
JP56005553A 1981-01-16 1981-01-16 Generating circuit for control signal Pending JPS57119503A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56005553A JPS57119503A (en) 1981-01-16 1981-01-16 Generating circuit for control signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56005553A JPS57119503A (en) 1981-01-16 1981-01-16 Generating circuit for control signal

Publications (1)

Publication Number Publication Date
JPS57119503A true JPS57119503A (en) 1982-07-26

Family

ID=11614379

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56005553A Pending JPS57119503A (en) 1981-01-16 1981-01-16 Generating circuit for control signal

Country Status (1)

Country Link
JP (1) JPS57119503A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5894211A (en) * 1981-11-30 1983-06-04 Sony Corp Full-wave rectifying circuit
JPS63244911A (en) * 1987-03-30 1988-10-12 Nec Corp Compander circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5894211A (en) * 1981-11-30 1983-06-04 Sony Corp Full-wave rectifying circuit
JPH0324811B2 (en) * 1981-11-30 1991-04-04 Sony Corp
JPS63244911A (en) * 1987-03-30 1988-10-12 Nec Corp Compander circuit
JPH0683002B2 (en) * 1987-03-30 1994-10-19 日本電気株式会社 Compander circuit

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