JPS5631212A - Variable attenuator - Google Patents

Variable attenuator

Info

Publication number
JPS5631212A
JPS5631212A JP10776379A JP10776379A JPS5631212A JP S5631212 A JPS5631212 A JP S5631212A JP 10776379 A JP10776379 A JP 10776379A JP 10776379 A JP10776379 A JP 10776379A JP S5631212 A JPS5631212 A JP S5631212A
Authority
JP
Japan
Prior art keywords
discharge
turned
capacitor
signal
switch
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
JP10776379A
Other languages
Japanese (ja)
Inventor
Michinobu Ohata
Koji Mizushima
Masao Yamazawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10776379A priority Critical patent/JPS5631212A/en
Publication of JPS5631212A publication Critical patent/JPS5631212A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
    • H03H19/008—Networks using time-varying elements, e.g. N-path filters with variable switch closing time

Landscapes

  • Networks Using Active Elements (AREA)

Abstract

PURPOSE:To obtain an attenuation ratio in the speed matched to the sampling period, by controlling the discharge operation frequency dependent upon a discharging circuit according to the attenuation ratio designation signal. CONSTITUTION:When the input analogue signal is as shwon in figure B, switch SW is turned on temporarily as shown in figure C by the signal from timing control part 5 and is next turned off. Switch SW2 is turned on and off as shown in figure D by the prescribed frequency by the control from discharge control circuit 6. Electric charge of hold capacitor 3 is discharged to the discharge capacitor C2 side for every discharge, and the terminal voltage of capacitor 3 is lowered as shown in figure E. Next, the terminal voltage after discharge of the prescribed frequency is output to terminal 7 through amplifier 9.
JP10776379A 1979-08-24 1979-08-24 Variable attenuator Pending JPS5631212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10776379A JPS5631212A (en) 1979-08-24 1979-08-24 Variable attenuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10776379A JPS5631212A (en) 1979-08-24 1979-08-24 Variable attenuator

Publications (1)

Publication Number Publication Date
JPS5631212A true JPS5631212A (en) 1981-03-30

Family

ID=14467368

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10776379A Pending JPS5631212A (en) 1979-08-24 1979-08-24 Variable attenuator

Country Status (1)

Country Link
JP (1) JPS5631212A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60125026U (en) * 1984-01-31 1985-08-23 三菱重工業株式会社 Elastic ring feeding device
EP0191619A2 (en) * 1985-02-13 1986-08-20 Nortel Networks Corporation Automatic linear compression circuit
JPH069829U (en) * 1992-07-11 1994-02-08 助川電気工業株式会社 Ring-shaped member fitting guide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60125026U (en) * 1984-01-31 1985-08-23 三菱重工業株式会社 Elastic ring feeding device
EP0191619A2 (en) * 1985-02-13 1986-08-20 Nortel Networks Corporation Automatic linear compression circuit
JPH069829U (en) * 1992-07-11 1994-02-08 助川電気工業株式会社 Ring-shaped member fitting guide

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