JPS5690610A - Gain control system of light signal observation device - Google Patents

Gain control system of light signal observation device

Info

Publication number
JPS5690610A
JPS5690610A JP16862979A JP16862979A JPS5690610A JP S5690610 A JPS5690610 A JP S5690610A JP 16862979 A JP16862979 A JP 16862979A JP 16862979 A JP16862979 A JP 16862979A JP S5690610 A JPS5690610 A JP S5690610A
Authority
JP
Japan
Prior art keywords
broad
gain switching
band
signal
switching device
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
JP16862979A
Other languages
Japanese (ja)
Other versions
JPS6242406B2 (en
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 JP16862979A priority Critical patent/JPS5690610A/en
Publication of JPS5690610A publication Critical patent/JPS5690610A/en
Publication of JPS6242406B2 publication Critical patent/JPS6242406B2/ja
Granted 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 performing the gain switching of a gain switching device by selectively alternating a broad-band amplifier and alternative circuit. CONSTITUTION:Light signal beam 204 inputted via optical fiber, etc., is photoelectrically converted by light signal input device 203 and then 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 broad-band amplifiers 304A and 304B. 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. The output of gain switching device 300 is supplied to broad-band amplifier 305. This amplifier 305 further amplifies the signal by one, two or five times at need and its output is sent to output terminal 11 via delay line 306 and main amplifier 307.
JP16862979A 1979-12-25 1979-12-25 Gain control system of light signal observation device Granted JPS5690610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16862979A JPS5690610A (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
JP16862979A JPS5690610A (en) 1979-12-25 1979-12-25 Gain control system of light signal observation device

Publications (2)

Publication Number Publication Date
JPS5690610A true JPS5690610A (en) 1981-07-22
JPS6242406B2 JPS6242406B2 (en) 1987-09-08

Family

ID=15871587

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16862979A Granted JPS5690610A (en) 1979-12-25 1979-12-25 Gain control system of light signal observation device

Country Status (1)

Country Link
JP (1) JPS5690610A (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
US5374895A (en) * 1993-07-12 1994-12-20 Spectrian, Inc. NMR/MRI pulse amplifier
US6172559B1 (en) 1998-02-27 2001-01-09 Nec Corporation Variable gain amplifying device
JP2006270969A (en) * 2005-03-24 2006-10-05 Avago Technologies General Ip (Singapore) Private Ltd Automatic gain control circuit for infrared receiver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH068721Y2 (en) * 1988-03-10 1994-03-09 株式会社アサヒコーポレーション Gateball shoes

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
US5374895A (en) * 1993-07-12 1994-12-20 Spectrian, Inc. NMR/MRI pulse amplifier
US6172559B1 (en) 1998-02-27 2001-01-09 Nec Corporation Variable gain amplifying device
JP2006270969A (en) * 2005-03-24 2006-10-05 Avago Technologies General Ip (Singapore) Private Ltd Automatic gain control circuit for infrared receiver

Also Published As

Publication number Publication date
JPS6242406B2 (en) 1987-09-08

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