JPS5778283A - Video detection circuit - Google Patents

Video detection circuit

Info

Publication number
JPS5778283A
JPS5778283A JP15437780A JP15437780A JPS5778283A JP S5778283 A JPS5778283 A JP S5778283A JP 15437780 A JP15437780 A JP 15437780A JP 15437780 A JP15437780 A JP 15437780A JP S5778283 A JPS5778283 A JP S5778283A
Authority
JP
Japan
Prior art keywords
video detection
detection circuit
base
reliability
ground
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
JP15437780A
Other languages
Japanese (ja)
Inventor
Kenji Kojima
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15437780A priority Critical patent/JPS5778283A/en
Publication of JPS5778283A publication Critical patent/JPS5778283A/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
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To increase the reliability of transistors (TRs), by inserting 1 or >=2 of Zener diodes between the base and ground of an output TR of a video detection circuit, in the video detection circuit with a black noise reversing circuit. CONSTITUTION:Since a Zener diode 22 is inserted between the base and ground of a video detection output TR12, even if the input signal at an input terminal 1 is in any state, the base voltage of the TR12 does not exceed the dielectric strength and no reverse current flows to the base-emitter of a TR14. Thus, the TR14 is operated at a region without problem on reliability at all times.
JP15437780A 1980-10-31 1980-10-31 Video detection circuit Pending JPS5778283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15437780A JPS5778283A (en) 1980-10-31 1980-10-31 Video detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15437780A JPS5778283A (en) 1980-10-31 1980-10-31 Video detection circuit

Publications (1)

Publication Number Publication Date
JPS5778283A true JPS5778283A (en) 1982-05-15

Family

ID=15582814

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15437780A Pending JPS5778283A (en) 1980-10-31 1980-10-31 Video detection circuit

Country Status (1)

Country Link
JP (1) JPS5778283A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0419879U (en) * 1990-05-31 1992-02-19

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0419879U (en) * 1990-05-31 1992-02-19

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