JPS5617511A - Variable attenuating circuit - Google Patents

Variable attenuating circuit

Info

Publication number
JPS5617511A
JPS5617511A JP9349979A JP9349979A JPS5617511A JP S5617511 A JPS5617511 A JP S5617511A JP 9349979 A JP9349979 A JP 9349979A JP 9349979 A JP9349979 A JP 9349979A JP S5617511 A JPS5617511 A JP S5617511A
Authority
JP
Japan
Prior art keywords
circuit
variable
attenuating
switch
multiple steps
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
JP9349979A
Other languages
Japanese (ja)
Inventor
Tadao Suzuki
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP9349979A priority Critical patent/JPS5617511A/en
Publication of JPS5617511A publication Critical patent/JPS5617511A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/24—Frequency-independent attenuators

Landscapes

  • Networks Using Active Elements (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To ensure a variable control in multiple steps for the attenuating circuit, by giving a selective control to the variable attenuating circuit connected virtically via the buffer circuit by means of the switch. CONSTITUTION:One of the audio signals, such as PHONO-L or the like, is supplied to variable attenuating circuit 37 via monitor signal selecting circuit 31 and mode switching circuit 33. The 1st and 2nd variable attenuating circuits 34 and 36 are connected via buffer circuit 35. Circuit 35 consists of switching circuit 39 comprising the resistor and the switch plus the external circuit. And each switch of ciricuit 39 is controlled by the driver circuit, and then the minimum variable range of the extent of attenuation is made different from each other between the attenuating circuits. As a result, a variable control is ensured for the attenuating circuit in multiple steps and over a wide range.
JP9349979A 1979-07-23 1979-07-23 Variable attenuating circuit Pending JPS5617511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9349979A JPS5617511A (en) 1979-07-23 1979-07-23 Variable attenuating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9349979A JPS5617511A (en) 1979-07-23 1979-07-23 Variable attenuating circuit

Publications (1)

Publication Number Publication Date
JPS5617511A true JPS5617511A (en) 1981-02-19

Family

ID=14084032

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9349979A Pending JPS5617511A (en) 1979-07-23 1979-07-23 Variable attenuating circuit

Country Status (1)

Country Link
JP (1) JPS5617511A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197917A (en) * 1981-05-29 1982-12-04 Jido Keisoku Gijutsu Kenkiyuukumiai Reference voltage supplying device
JPS58119224U (en) * 1982-02-04 1983-08-13 赤井電機株式会社 Stepped Electronic Variable Resistor Integrated Circuit
JPH01284691A (en) * 1988-05-11 1989-11-15 Mitani Sekisan Co Ltd Management of drilling

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465275A (en) * 1977-10-07 1979-05-25 Transcale Ab Controller for electronic device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5465275A (en) * 1977-10-07 1979-05-25 Transcale Ab Controller for electronic device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197917A (en) * 1981-05-29 1982-12-04 Jido Keisoku Gijutsu Kenkiyuukumiai Reference voltage supplying device
JPS58119224U (en) * 1982-02-04 1983-08-13 赤井電機株式会社 Stepped Electronic Variable Resistor Integrated Circuit
JPH01284691A (en) * 1988-05-11 1989-11-15 Mitani Sekisan Co Ltd Management of drilling

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