JPS5690611A - Gain control system of light signal observation device - Google Patents

Gain control system of light signal observation device

Info

Publication number
JPS5690611A
JPS5690611A JP16863079A JP16863079A JPS5690611A JP S5690611 A JPS5690611 A JP S5690611A JP 16863079 A JP16863079 A JP 16863079A JP 16863079 A JP16863079 A JP 16863079A JP S5690611 A JPS5690611 A JP S5690611A
Authority
JP
Japan
Prior art keywords
band
light signal
amplifiers
signal
switching
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
JP16863079A
Other languages
Japanese (ja)
Inventor
Kozo Uchida
Takashi Matsuno
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP16863079A priority Critical patent/JPS5690611A/en
Publication of JPS5690611A publication Critical patent/JPS5690611A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/02—Manually-operated control

Abstract

PURPOSE:To enable wide gain switching while maintaining broad-band characteristics, by using a board-band amplifier and alternative circuit selectively through switching. CONSTITUTION:Light signal beam 204 inputted via optical fiber, etc., it photoelectrically converted by light signal input device 203 and inputted to gain switching device 300 via coaxial cable 220B. When the input signal to gain switching device 300 is small and a high gain is required, broad-band signal switches 301A, 302A, 301B, and 302B are so changed over that the input signal may be amplified by board-band amplifiers 304A and 304B. This operation is performed corresponding to the operation of a sensitivity change-over switch. As amplifiers 304A and 304B, noninvertive amplifiers are used so that the signal polarity will not be inverted in the switching of the number of stages.
JP16863079A 1979-12-25 1979-12-25 Gain control system of light signal observation device Pending JPS5690611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16863079A JPS5690611A (en) 1979-12-25 1979-12-25 Gain control system of light signal observation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16863079A JPS5690611A (en) 1979-12-25 1979-12-25 Gain control system of light signal observation device

Publications (1)

Publication Number Publication Date
JPS5690611A true JPS5690611A (en) 1981-07-22

Family

ID=15871602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16863079A Pending JPS5690611A (en) 1979-12-25 1979-12-25 Gain control system of light signal observation device

Country Status (1)

Country Link
JP (1) JPS5690611A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910478A (en) * 1988-06-10 1990-03-20 Mitsubishi Denki Kabushiki Kaisha Amplifier circuit and method of controlling output power thereof
EP0780972A1 (en) * 1995-12-22 1997-06-25 Richard Hirschmann GmbH & Co. Universal amplifier
US6172559B1 (en) 1998-02-27 2001-01-09 Nec Corporation Variable gain amplifying device
JP2022090835A (en) * 2020-12-08 2022-06-20 アンリツ株式会社 Waveform observation device and waveform observation method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910478A (en) * 1988-06-10 1990-03-20 Mitsubishi Denki Kabushiki Kaisha Amplifier circuit and method of controlling output power thereof
EP0780972A1 (en) * 1995-12-22 1997-06-25 Richard Hirschmann GmbH & Co. Universal amplifier
US6172559B1 (en) 1998-02-27 2001-01-09 Nec Corporation Variable gain amplifying device
JP2022090835A (en) * 2020-12-08 2022-06-20 アンリツ株式会社 Waveform observation device and waveform observation method

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