JPS5482120A - Picture quality control circuit - Google Patents

Picture quality control circuit

Info

Publication number
JPS5482120A
JPS5482120A JP14937377A JP14937377A JPS5482120A JP S5482120 A JPS5482120 A JP S5482120A JP 14937377 A JP14937377 A JP 14937377A JP 14937377 A JP14937377 A JP 14937377A JP S5482120 A JPS5482120 A JP S5482120A
Authority
JP
Japan
Prior art keywords
picture quality
resistance
quality control
control circuit
preshoot
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.)
Granted
Application number
JP14937377A
Other languages
Japanese (ja)
Other versions
JPS631787B2 (en
Inventor
Fumio Inoue
Masao Kako
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14937377A priority Critical patent/JPS5482120A/en
Publication of JPS5482120A publication Critical patent/JPS5482120A/en
Publication of JPS631787B2 publication Critical patent/JPS631787B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Picture Signal Circuits (AREA)

Abstract

PURPOSE: To obtain the clear-cut picture quality with no unnatural feeling by increasing the gain of the secondary differential signal with the sharpened picture quality and at the same time reducing the width of both the preshoot and overshoot.
CONSTITUTION: The picture signal supplied to the base of transistor 2 is led to output terminal from the emitter of the transistor via coil 6. Resistance 13 is connected between the emitter and the earth, and resistance 14, Dc blocking capacitor 15 and picture quality control resistance 16 are connected in series between terminal 7 and the earth. Voltage gain GV between the input terminals is shown in Eq. 1. Thus, time constant decreases when A is increased with the sharpened picture quality, and then the clear-cut picture quality is ensured with no unnatural feeling by reducing the width of both the preshoot and overshoot.
COPYRIGHT: (C)1979,JPO&Japio
JP14937377A 1977-12-14 1977-12-14 Picture quality control circuit Granted JPS5482120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14937377A JPS5482120A (en) 1977-12-14 1977-12-14 Picture quality control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14937377A JPS5482120A (en) 1977-12-14 1977-12-14 Picture quality control circuit

Publications (2)

Publication Number Publication Date
JPS5482120A true JPS5482120A (en) 1979-06-30
JPS631787B2 JPS631787B2 (en) 1988-01-14

Family

ID=15473706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14937377A Granted JPS5482120A (en) 1977-12-14 1977-12-14 Picture quality control circuit

Country Status (1)

Country Link
JP (1) JPS5482120A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49131332A (en) * 1973-04-19 1974-12-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49131332A (en) * 1973-04-19 1974-12-17

Also Published As

Publication number Publication date
JPS631787B2 (en) 1988-01-14

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