JPS5489461A - Variable resistance attenuator - Google Patents

Variable resistance attenuator

Info

Publication number
JPS5489461A
JPS5489461A JP16078577A JP16078577A JPS5489461A JP S5489461 A JPS5489461 A JP S5489461A JP 16078577 A JP16078577 A JP 16078577A JP 16078577 A JP16078577 A JP 16078577A JP S5489461 A JPS5489461 A JP S5489461A
Authority
JP
Japan
Prior art keywords
resistance
attenuator
pin diode
diodes
diode
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.)
Granted
Application number
JP16078577A
Other languages
Japanese (ja)
Other versions
JPS6057728B2 (en
Inventor
Toshio Hasegawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP16078577A priority Critical patent/JPS6057728B2/en
Publication of JPS5489461A publication Critical patent/JPS5489461A/en
Publication of JPS6057728B2 publication Critical patent/JPS6057728B2/en
Expired 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
    • H03H7/255—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable the element being a diode the element being a PIN diode

Landscapes

  • Attenuators (AREA)

Abstract

PURPOSE:To obtain a wide-variable range resistance attenuator by adding a resistance, which is connected in parallel to a PIN diode, and another diode to a L- type variable resistance attenuator constituted by the PIN diode. CONSTITUTION:Resistance 15 is connected in parallel to PIN diode 14, and the cathod of PIN diode 16 is connected to the cathode side of diode 14. A L-type circuit is constituted by diodes 14 and 16, and the sum of the current flowed to diodes 14 and 16 becomes constant approximately by setting voltage Vy of voltage supply terminal 24 fixed. When voltage Vx applied to terminal 23 is changed, the current flowed to diodes 14 and 16 can be reduced or increased dependently upon the relation between Vy and Vx, and the attenuation quantity of this attenuator can be changed. Meanwhile, if the value of resistance 15 is made approximately equal to load impedance 17, the matching of input impedance can be held well. As a result a variable resistance attenuator which has a wide variable range of the attenuation quantity can be obtained.
JP16078577A 1977-12-26 1977-12-26 variable resistance attenuator Expired JPS6057728B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16078577A JPS6057728B2 (en) 1977-12-26 1977-12-26 variable resistance attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16078577A JPS6057728B2 (en) 1977-12-26 1977-12-26 variable resistance attenuator

Publications (2)

Publication Number Publication Date
JPS5489461A true JPS5489461A (en) 1979-07-16
JPS6057728B2 JPS6057728B2 (en) 1985-12-17

Family

ID=15722386

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16078577A Expired JPS6057728B2 (en) 1977-12-26 1977-12-26 variable resistance attenuator

Country Status (1)

Country Link
JP (1) JPS6057728B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01284008A (en) * 1988-05-11 1989-11-15 Nec Corp Variable attenuation circuit
JP2006527545A (en) * 2003-06-06 2006-11-30 サイエンティフィック−アトランタ， インコーポレイテッド Optical receiver with open loop automatic gain control circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01284008A (en) * 1988-05-11 1989-11-15 Nec Corp Variable attenuation circuit
JP2006527545A (en) * 2003-06-06 2006-11-30 サイエンティフィック−アトランタ， インコーポレイテッド Optical receiver with open loop automatic gain control circuit

Also Published As

Publication number Publication date
JPS6057728B2 (en) 1985-12-17

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