JPS5758480A - De-emphasis circuit - Google Patents

De-emphasis circuit

Info

Publication number
JPS5758480A
JPS5758480A JP55132860A JP13286080A JPS5758480A JP S5758480 A JPS5758480 A JP S5758480A JP 55132860 A JP55132860 A JP 55132860A JP 13286080 A JP13286080 A JP 13286080A JP S5758480 A JPS5758480 A JP S5758480A
Authority
JP
Japan
Prior art keywords
circuit
level
synchronizing signal
tip
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
JP55132860A
Other languages
Japanese (ja)
Inventor
Yasunari Arafune
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55132860A priority Critical patent/JPS5758480A/en
Publication of JPS5758480A publication Critical patent/JPS5758480A/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
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/923—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback using preemphasis of the signal before modulation and deemphasis of the signal after demodulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To operate a de-emphasis circuit in excellent manner, by detecting the DC level of tip a synchronizing signal to be sampled and adjusting the bias level of a variable bias circuit according to this DC level. CONSTITUTION:A variable bias circuit 2 includes a synchronizing signal and stored on a medium through frequency modulation. The output of this circuit is transmitted to a de-emphasis circuit 3. The synchronizing signal in the output signal of the circuit 3 is sampled with the synchronizing signal from a synchronizing generation circuit 5 and the DC component at the tip of this signal is detected at a sample hold circuit 4. A voltage corresponding to the detected DC level is applied to the circuit 2 through the adjustment of a DC amplifying cirucit 6. Thus, the DC level of the tip of the synchronizing signal to be de-emphasized is kept constant to increase dynamic range and lower the operating voltage.
JP55132860A 1980-09-26 1980-09-26 De-emphasis circuit Pending JPS5758480A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55132860A JPS5758480A (en) 1980-09-26 1980-09-26 De-emphasis circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55132860A JPS5758480A (en) 1980-09-26 1980-09-26 De-emphasis circuit

Publications (1)

Publication Number Publication Date
JPS5758480A true JPS5758480A (en) 1982-04-08

Family

ID=15091219

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55132860A Pending JPS5758480A (en) 1980-09-26 1980-09-26 De-emphasis circuit

Country Status (1)

Country Link
JP (1) JPS5758480A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60231899A (en) * 1984-04-26 1985-11-18 株式会社　興人 Heat resistant sheet and its production
JPS6298000A (en) * 1985-10-25 1987-05-07 日東紡績株式会社 Inorganic fiberboard
US4806206A (en) * 1983-07-28 1989-02-21 Kojin Co., Ltd. Process for preparing ceramic molding
US5679433A (en) * 1991-10-31 1997-10-21 Kabushiki Kaish Tokiwa Denki Noncombustible sheet, noncombustible laminated sheet, noncombustible honey comb structural material, noncombustible board, noncombustible molded product, and manufacturing method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806206A (en) * 1983-07-28 1989-02-21 Kojin Co., Ltd. Process for preparing ceramic molding
JPS60231899A (en) * 1984-04-26 1985-11-18 株式会社　興人 Heat resistant sheet and its production
JPS6298000A (en) * 1985-10-25 1987-05-07 日東紡績株式会社 Inorganic fiberboard
JPH0160600B2 (en) * 1985-10-25 1989-12-25 Nitto Boseki Co Ltd
US5679433A (en) * 1991-10-31 1997-10-21 Kabushiki Kaish Tokiwa Denki Noncombustible sheet, noncombustible laminated sheet, noncombustible honey comb structural material, noncombustible board, noncombustible molded product, and manufacturing method thereof

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