JPS6449413A - Bridging t-type variable resistance attenuator - Google Patents

Bridging t-type variable resistance attenuator

Info

Publication number
JPS6449413A
JPS6449413A JP20517687A JP20517687A JPS6449413A JP S6449413 A JPS6449413 A JP S6449413A JP 20517687 A JP20517687 A JP 20517687A JP 20517687 A JP20517687 A JP 20517687A JP S6449413 A JPS6449413 A JP S6449413A
Authority
JP
Japan
Prior art keywords
pin diode
impedance
attenuator
bridging
input
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
JP20517687A
Other languages
Japanese (ja)
Inventor
Tomoya Kaneko
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
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 filed Critical NEC Corp
Priority to JP20517687A priority Critical patent/JPS6449413A/en
Publication of JPS6449413A publication Critical patent/JPS6449413A/en
Pending legal-status Critical Current

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  • Attenuators (AREA)

Abstract

PURPOSE:To miniaturize the titled attenuator, by constituting a variable resistor inserted in series with an input/output terminal of a PIN diode, and the variable resistor inserted in parallel with a line of the PIN diode and a 1/4-wave impedance inversion line. CONSTITUTION:An impedance observing the PIN diode 12 from the connection point of resistors 5 and 6 is inversely proportional to the impedance between the terminals of the PIN diode 10, and a device is operated ideally as a bridging T-type resistance attenuator, and no reflecting wave is generated at the input/ output terminal. In such a way, it is possible to vary a attenuating quantity successively as keeping the impedance of input/output constant by supplying a DC bias current from a bias supplying terminal 9 as controlling it in the bridging T-type resistance attenuator. In the circuit, the attenuating quantity is decreased by increasing a DC current. Therefore, in the circuit, it is enough to prepare one 1/4-wave line whose geometric size is limited, and it is possible to miniaturize the circuit compared with an ongoing attenuator.
JP20517687A 1987-08-20 1987-08-20 Bridging t-type variable resistance attenuator Pending JPS6449413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20517687A JPS6449413A (en) 1987-08-20 1987-08-20 Bridging t-type variable resistance attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20517687A JPS6449413A (en) 1987-08-20 1987-08-20 Bridging t-type variable resistance attenuator

Publications (1)

Publication Number Publication Date
JPS6449413A true JPS6449413A (en) 1989-02-23

Family

ID=16502681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20517687A Pending JPS6449413A (en) 1987-08-20 1987-08-20 Bridging t-type variable resistance attenuator

Country Status (1)

Country Link
JP (1) JPS6449413A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5808520A (en) * 1995-03-22 1998-09-15 Nec Corporation Attenuating circuit using quarter-wave lines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5808520A (en) * 1995-03-22 1998-09-15 Nec Corporation Attenuating circuit using quarter-wave lines

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