JPS57147310A - Variable attenuating circuit - Google Patents

Variable attenuating circuit

Info

Publication number
JPS57147310A
JPS57147310A JP3302581A JP3302581A JPS57147310A JP S57147310 A JPS57147310 A JP S57147310A JP 3302581 A JP3302581 A JP 3302581A JP 3302581 A JP3302581 A JP 3302581A JP S57147310 A JPS57147310 A JP S57147310A
Authority
JP
Japan
Prior art keywords
diode
pin
increases
loss
potential
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
JP3302581A
Other languages
Japanese (ja)
Inventor
Taichiro Ise
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 JP3302581A priority Critical patent/JPS57147310A/en
Publication of JPS57147310A publication Critical patent/JPS57147310A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0052—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using diodes
    • H03G1/0058—PIN-diodes

Abstract

PURPOSE:To improve frequency characteristics by interlocking and varying a variable attenuating circuit composed of a pin-diode and a frequency compensating circuit composed of a varactor diode. CONSTITUTION:As the positive potential of a direct current applied to an input terminal 3 nears the ground potential, a current flowing through a pin-diode X1 decreases and the pin-diode X1 has higher resistance. Then, the loss at a high frequency due to a load capacitance C0 increases. In this case, a potential, however, applied to a varactor diode X2 drops, so the capacity increases. As a result, a signal sent to an output terminal 2 through the varactor diode X2 and a capacitor C3 increases to compensate the loss at a high frequency.
JP3302581A 1981-03-07 1981-03-07 Variable attenuating circuit Pending JPS57147310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3302581A JPS57147310A (en) 1981-03-07 1981-03-07 Variable attenuating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3302581A JPS57147310A (en) 1981-03-07 1981-03-07 Variable attenuating circuit

Publications (1)

Publication Number Publication Date
JPS57147310A true JPS57147310A (en) 1982-09-11

Family

ID=12375240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3302581A Pending JPS57147310A (en) 1981-03-07 1981-03-07 Variable attenuating circuit

Country Status (1)

Country Link
JP (1) JPS57147310A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739283A (en) * 1987-03-02 1988-04-19 Tektronix, Inc. Variable transient response control for linear integrated-circuit high-frequency amplifiers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5754821A (en) * 1980-09-19 1982-04-01 Toyota Motor Corp Detector for choking of nozzle for spray gun

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5754821A (en) * 1980-09-19 1982-04-01 Toyota Motor Corp Detector for choking of nozzle for spray gun

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739283A (en) * 1987-03-02 1988-04-19 Tektronix, Inc. Variable transient response control for linear integrated-circuit high-frequency amplifiers

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