JPS5781777A - Signal detecting circuit - Google Patents

Signal detecting circuit

Info

Publication number
JPS5781777A
JPS5781777A JP55157933A JP15793380A JPS5781777A JP S5781777 A JPS5781777 A JP S5781777A JP 55157933 A JP55157933 A JP 55157933A JP 15793380 A JP15793380 A JP 15793380A JP S5781777 A JPS5781777 A JP S5781777A
Authority
JP
Japan
Prior art keywords
hybrid circuit
signals
point
amount
amplifier
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
JP55157933A
Other languages
Japanese (ja)
Inventor
Hiroshi Kurokawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55157933A priority Critical patent/JPS5781777A/en
Publication of JPS5781777A publication Critical patent/JPS5781777A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00095—Systems or arrangements for the transmission of the picture signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Facsimile Transmission Control (AREA)

Abstract

PURPOSE:To eliminate the influence of the nonlinear characteristic and frequency of a hybrid circuit, by offsetting the amount equivalent to of leadkage of picture signals by taking out a part of signals of the output section of the hybrid circuit as the signals for negating the leaked amount. CONSTITUTION:The voltage for offsetting the amount equivalent to leakage is taken out from a point (c) through a hybrid circuit 2. The picture signal from the point (c) is added to a differential amplifier 33 through an amplifier 32 for adjusting the level. The leaked amount of the signal from a point (a) are also added to the differential amplifier 33 through an amplifier 31 for adjusting the level. Therefore, in the output of the differential amplifier 33, the leaked amount passed through the hybrid circuit 2 during the course of delivery of the picture signal are offset by a part of the picture signal passed through the hybrid circuit 2.
JP55157933A 1980-11-10 1980-11-10 Signal detecting circuit Pending JPS5781777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55157933A JPS5781777A (en) 1980-11-10 1980-11-10 Signal detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55157933A JPS5781777A (en) 1980-11-10 1980-11-10 Signal detecting circuit

Publications (1)

Publication Number Publication Date
JPS5781777A true JPS5781777A (en) 1982-05-21

Family

ID=15660644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55157933A Pending JPS5781777A (en) 1980-11-10 1980-11-10 Signal detecting circuit

Country Status (1)

Country Link
JP (1) JPS5781777A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121837A (en) * 1982-01-14 1983-07-20 Nec Corp Two-four wire converting circuit
JPS59135934A (en) * 1983-01-25 1984-08-04 Matsushita Electric Ind Co Ltd Hybrid circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121837A (en) * 1982-01-14 1983-07-20 Nec Corp Two-four wire converting circuit
JPS59135934A (en) * 1983-01-25 1984-08-04 Matsushita Electric Ind Co Ltd Hybrid circuit

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