JPS54157032A - Automatic gain control unit in television receiver - Google Patents

Automatic gain control unit in television receiver

Info

Publication number
JPS54157032A
JPS54157032A JP6607778A JP6607778A JPS54157032A JP S54157032 A JPS54157032 A JP S54157032A JP 6607778 A JP6607778 A JP 6607778A JP 6607778 A JP6607778 A JP 6607778A JP S54157032 A JPS54157032 A JP S54157032A
Authority
JP
Japan
Prior art keywords
circuit
agc
noise
gain control
time constant
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
JP6607778A
Other languages
Japanese (ja)
Other versions
JPS6160628B2 (en
Inventor
Hiroto Yasumura
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 JP6607778A priority Critical patent/JPS54157032A/en
Priority to US06/042,345 priority patent/US4292598A/en
Priority to DE2921777A priority patent/DE2921777C2/en
Priority to GB7918917A priority patent/GB2026269B/en
Publication of JPS54157032A publication Critical patent/JPS54157032A/en
Publication of JPS6160628B2 publication Critical patent/JPS6160628B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Picture Signal Circuits (AREA)
  • Television Receiver Circuits (AREA)

Abstract

PURPOSE: To prevent the synchronization disturbance dependent upon external pulse noise and the picture quality deterioration of videos by taking out a voltage for gain control from the time constant circuit of an AGC.
CONSTITUTION: In case that pulse noise is superposed onto video signals, noise is detected by noise detection circuit 20 for AGC circuit, and control circuit 18 is cut off by this detection output, and the output of AGC control voltage detection circuit 17 is broken. Consequently, the AGC control voltage which controls video IF amplification and gain control circuit 11 is determined by the time constant of AGC time constant circuit 19. Then, when noise eliminated, circuit 18 is operated, and the AGC function is operated by the output of circuit 17, and the AGC control voltage according to the level of video signals is held in circuit 19, thus making a prescribed operation possible.
COPYRIGHT: (C)1979,JPO&Japio
JP6607778A 1978-06-01 1978-06-01 Automatic gain control unit in television receiver Granted JPS54157032A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6607778A JPS54157032A (en) 1978-06-01 1978-06-01 Automatic gain control unit in television receiver
US06/042,345 US4292598A (en) 1978-06-01 1979-05-25 Automatic gain control circuit
DE2921777A DE2921777C2 (en) 1978-06-01 1979-05-29 Automatic gain control circuit
GB7918917A GB2026269B (en) 1978-06-01 1979-05-31 Automatic gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6607778A JPS54157032A (en) 1978-06-01 1978-06-01 Automatic gain control unit in television receiver

Publications (2)

Publication Number Publication Date
JPS54157032A true JPS54157032A (en) 1979-12-11
JPS6160628B2 JPS6160628B2 (en) 1986-12-22

Family

ID=13305415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6607778A Granted JPS54157032A (en) 1978-06-01 1978-06-01 Automatic gain control unit in television receiver

Country Status (1)

Country Link
JP (1) JPS54157032A (en)

Also Published As

Publication number Publication date
JPS6160628B2 (en) 1986-12-22

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