JPS57208780A - Wave shaping circuit - Google Patents

Wave shaping circuit

Info

Publication number
JPS57208780A
JPS57208780A JP9444581A JP9444581A JPS57208780A JP S57208780 A JPS57208780 A JP S57208780A JP 9444581 A JP9444581 A JP 9444581A JP 9444581 A JP9444581 A JP 9444581A JP S57208780 A JPS57208780 A JP S57208780A
Authority
JP
Japan
Prior art keywords
signal
level
slice
amplifier
inputted
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
JP9444581A
Other languages
Japanese (ja)
Inventor
Kazu Okada
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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 Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP9444581A priority Critical patent/JPS57208780A/en
Publication of JPS57208780A publication Critical patent/JPS57208780A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • H04N7/035—Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To obtain a constant duty ratio under controlling, by picking up a DC level through the pulse shaping of a clock pulse signal with a prescribed duty ratio and controlling a slice level with a difference output through the comparison between the preset reference level and the DC level. CONSTITUTION:The DC reproduction is made from a character multiplex broadcast signal inputted via a television broadcast transmission system at a pedestal clamp circuit 1 and the signal is inputted to a slice amplifier 2. From a rectangular wave signal shaped, a clock run-in signal only is picked up at a clock pulse gate circuit 3 and inputted to a low pass filter 4. From the low pass filter 4, a DC signal is detected and it is compared with a prescribed reference level Er at a DC amplifier 5 and the difference output is obtained. The comparison output is fed back to the slice amplifier 2 to control the slice level.
JP9444581A 1981-06-18 1981-06-18 Wave shaping circuit Pending JPS57208780A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9444581A JPS57208780A (en) 1981-06-18 1981-06-18 Wave shaping circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9444581A JPS57208780A (en) 1981-06-18 1981-06-18 Wave shaping circuit

Publications (1)

Publication Number Publication Date
JPS57208780A true JPS57208780A (en) 1982-12-21

Family

ID=14110452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9444581A Pending JPS57208780A (en) 1981-06-18 1981-06-18 Wave shaping circuit

Country Status (1)

Country Link
JP (1) JPS57208780A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59143481A (en) * 1983-02-04 1984-08-17 Matsushita Electric Ind Co Ltd Demodulating equipment of data clock
JPS6239383U (en) * 1985-08-29 1987-03-09

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54118148A (en) * 1978-03-07 1979-09-13 Nec Corp Comparator circuit
JPS55153456A (en) * 1979-05-18 1980-11-29 Nippon Telegr & Teleph Corp <Ntt> Pulse transmission circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54118148A (en) * 1978-03-07 1979-09-13 Nec Corp Comparator circuit
JPS55153456A (en) * 1979-05-18 1980-11-29 Nippon Telegr & Teleph Corp <Ntt> Pulse transmission circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59143481A (en) * 1983-02-04 1984-08-17 Matsushita Electric Ind Co Ltd Demodulating equipment of data clock
JPS6239383U (en) * 1985-08-29 1987-03-09
JPH0354468Y2 (en) * 1985-08-29 1991-12-02

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