JPS5533365A - Direct current regeneration circuit - Google Patents

Direct current regeneration circuit

Info

Publication number
JPS5533365A
JPS5533365A JP10599378A JP10599378A JPS5533365A JP S5533365 A JPS5533365 A JP S5533365A JP 10599378 A JP10599378 A JP 10599378A JP 10599378 A JP10599378 A JP 10599378A JP S5533365 A JPS5533365 A JP S5533365A
Authority
JP
Japan
Prior art keywords
signal
component
level
video signal
direct current
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
JP10599378A
Other languages
Japanese (ja)
Inventor
Fumio Nagumo
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP10599378A priority Critical patent/JPS5533365A/en
Publication of JPS5533365A publication Critical patent/JPS5533365A/en
Pending legal-status Critical Current

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  • Picture Signal Circuits (AREA)

Abstract

PURPOSE: To realize the DC regeneration with omission of the clamping capacitor by detecting differentially the DC component of the video signal which is lost in the transmission system and then piling the DC component on the video signal for the fixed period to perform the DC regeneration.
CONSTITUTION: Video signal Si obtained through the pickup element is supplied to preamplifier 1, and comparator 2 consisting of the differential amplifier and sampling hold circuit 3 are installed in series to the output of preamplifier 1. Then level Vi of signal Si of the black period is compared with level Vs of reference signal Ss. If level Vs is set to the black level (Vs = O) of signal So whose DC is regenerated, comparison output ΔV becomes equivalent to DC component ΔV of signal So which is lost in the transmission system. This DC component ΔV is supplied to the adder circuit comprising the differential amplifier and then added to signal Si, thus obtaining DC-regenerated video signal So.
COPYRIGHT: (C)1980,JPO&Japio
JP10599378A 1978-08-30 1978-08-30 Direct current regeneration circuit Pending JPS5533365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10599378A JPS5533365A (en) 1978-08-30 1978-08-30 Direct current regeneration circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10599378A JPS5533365A (en) 1978-08-30 1978-08-30 Direct current regeneration circuit

Publications (1)

Publication Number Publication Date
JPS5533365A true JPS5533365A (en) 1980-03-08

Family

ID=14422237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10599378A Pending JPS5533365A (en) 1978-08-30 1978-08-30 Direct current regeneration circuit

Country Status (1)

Country Link
JP (1) JPS5533365A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5798080U (en) * 1980-12-05 1982-06-16
US4998170A (en) * 1988-11-19 1991-03-05 Sanyo Electric Co., Ltd. Direct current restorer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5798080U (en) * 1980-12-05 1982-06-16
US4998170A (en) * 1988-11-19 1991-03-05 Sanyo Electric Co., Ltd. Direct current restorer

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