JPS56114426A - Current control type variable attenuator - Google Patents

Current control type variable attenuator

Info

Publication number
JPS56114426A
JPS56114426A JP1586780A JP1586780A JPS56114426A JP S56114426 A JPS56114426 A JP S56114426A JP 1586780 A JP1586780 A JP 1586780A JP 1586780 A JP1586780 A JP 1586780A JP S56114426 A JPS56114426 A JP S56114426A
Authority
JP
Japan
Prior art keywords
diodes
signal line
variable attenuator
current
resistor
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
JP1586780A
Other languages
Japanese (ja)
Inventor
Fumihiko Yokogawa
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP1586780A priority Critical patent/JPS56114426A/en
Publication of JPS56114426A publication Critical patent/JPS56114426A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/24—Frequency- independent attenuators
    • H03H7/25—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable
    • H03H7/253—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable the element being a diode

Landscapes

  • Attenuators (AREA)

Abstract

PURPOSE:To obtain a variable attenuator of simple constitution by connecting a resistor in series to the signal line, connecting diodes between the signal line and the ground, and controlling a current supplied to said diodes. CONSTITUTION:A resistor R1 is inserted in series into the signal line, and also plural diodes D1-DN are inserted between the signal line and the ground. An input signal VIN to be attenuated is voltage-divided by the resistor R1 and the diodes D1-DN, and becomes an attenuation output VOUT. Since this voltage division ratio can be varied by a current I which is supplied through the constant-current source 1 by the diodes D1-DN, it can be set optionally by controlling this current.
JP1586780A 1980-02-12 1980-02-12 Current control type variable attenuator Pending JPS56114426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1586780A JPS56114426A (en) 1980-02-12 1980-02-12 Current control type variable attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1586780A JPS56114426A (en) 1980-02-12 1980-02-12 Current control type variable attenuator

Publications (1)

Publication Number Publication Date
JPS56114426A true JPS56114426A (en) 1981-09-09

Family

ID=11900747

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1586780A Pending JPS56114426A (en) 1980-02-12 1980-02-12 Current control type variable attenuator

Country Status (1)

Country Link
JP (1) JPS56114426A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294117A2 (en) * 1987-06-04 1988-12-07 Texas Instruments Incorporated Monolithic variable attenuation switched limiter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294117A2 (en) * 1987-06-04 1988-12-07 Texas Instruments Incorporated Monolithic variable attenuation switched limiter

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