JPS56158515A - Clamp circuit - Google Patents

Clamp circuit

Info

Publication number
JPS56158515A
JPS56158515A JP6299180A JP6299180A JPS56158515A JP S56158515 A JPS56158515 A JP S56158515A JP 6299180 A JP6299180 A JP 6299180A JP 6299180 A JP6299180 A JP 6299180A JP S56158515 A JPS56158515 A JP S56158515A
Authority
JP
Japan
Prior art keywords
output
circuit
diode
input terminal
video signal
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
JP6299180A
Other languages
Japanese (ja)
Inventor
Norio Kanemitsu
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 JP6299180A priority Critical patent/JPS56158515A/en
Publication of JPS56158515A publication Critical patent/JPS56158515A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Input (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To increase the fidelity of the circuit characteristics through the correction of distortion of a video signal, by supplying the output from an image sensor to a peak follower circuit and a diode circuit and amplifying the output of both the circuits differentially. CONSTITUTION:A video signal in the output of an image sensor C<4>D1 is kept to the peak value with a peak follower circuit 7 and it is output to a + input terminal of a differential amplif circuit 6. The feedback input from the output side in which the zero level is at the reference value is fed to the - input terminal and also a diode 8 compensating the drop share of a diode included in the circuit 7 is connected to the - input terminal. Thus, since the high potential side of the video input signal can be a given reference value, a signal in which the black side maximum value of the video signal is taken as zero volt and the white side maximum value is taken as a given negative voltage by means of clamp processing is output from the output terminal of a clamp circuit 3.
JP6299180A 1980-05-13 1980-05-13 Clamp circuit Pending JPS56158515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6299180A JPS56158515A (en) 1980-05-13 1980-05-13 Clamp circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6299180A JPS56158515A (en) 1980-05-13 1980-05-13 Clamp circuit

Publications (1)

Publication Number Publication Date
JPS56158515A true JPS56158515A (en) 1981-12-07

Family

ID=13216340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6299180A Pending JPS56158515A (en) 1980-05-13 1980-05-13 Clamp circuit

Country Status (1)

Country Link
JP (1) JPS56158515A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5979674A (en) * 1982-10-28 1984-05-08 Toshiba Corp Color adhesion sensor
JPH0630134U (en) * 1992-09-21 1994-04-19 武夫 大代 A container (compost) for composting raw garbage shaped into garden materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5979674A (en) * 1982-10-28 1984-05-08 Toshiba Corp Color adhesion sensor
JPH0630134U (en) * 1992-09-21 1994-04-19 武夫 大代 A container (compost) for composting raw garbage shaped into garden materials

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