JPS57188118A - Television receiver - Google Patents

Television receiver

Info

Publication number
JPS57188118A
JPS57188118A JP56072263A JP7226381A JPS57188118A JP S57188118 A JPS57188118 A JP S57188118A JP 56072263 A JP56072263 A JP 56072263A JP 7226381 A JP7226381 A JP 7226381A JP S57188118 A JPS57188118 A JP S57188118A
Authority
JP
Japan
Prior art keywords
agc
tuner
channel
interference
detection
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
JP56072263A
Other languages
Japanese (ja)
Inventor
Tomoharu Genba
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 JP56072263A priority Critical patent/JPS57188118A/en
Publication of JPS57188118A publication Critical patent/JPS57188118A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver

Landscapes

  • Picture Signal Circuits (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To give an AGC at a level in which the SN ratio of a tuner and the interference are in the best condition, by controlling the amplifying factor of the tuner through the detection of a signal of an interrupting channel and rejecting the carrier of the reception channel. CONSTITUTION:A tuner 2 is provided with an AGC loop 8 to exclude the interference of an interference channel such as adjacent channels in addition of a conventional AGC loop 6. This AGC loop 8 consists of a means 9 excluding a carrier of a desired channel from the output terminal of the tuner 2 and detecting the signal in an interference channel, an AGC detection circuit obtaining an AGC voltage from the detection level outputted from this detection means 9, and an AGC amplifying circuit 11 amplifying and forming the AGC voltage from the detected output of the AGC detection circuit 10.
JP56072263A 1981-05-15 1981-05-15 Television receiver Pending JPS57188118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56072263A JPS57188118A (en) 1981-05-15 1981-05-15 Television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56072263A JPS57188118A (en) 1981-05-15 1981-05-15 Television receiver

Publications (1)

Publication Number Publication Date
JPS57188118A true JPS57188118A (en) 1982-11-19

Family

ID=13484220

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56072263A Pending JPS57188118A (en) 1981-05-15 1981-05-15 Television receiver

Country Status (1)

Country Link
JP (1) JPS57188118A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569920A1 (en) * 1984-09-03 1986-03-07 Pioneer Electronic Corp SUPERHETERODYNE WITH AN ANTI-INTERFERENCE DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569920A1 (en) * 1984-09-03 1986-03-07 Pioneer Electronic Corp SUPERHETERODYNE WITH AN ANTI-INTERFERENCE DEVICE

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