JPS59106265U - automatic fine tuning circuit - Google Patents
automatic fine tuning circuitInfo
- Publication number
- JPS59106265U JPS59106265U JP19709882U JP19709882U JPS59106265U JP S59106265 U JPS59106265 U JP S59106265U JP 19709882 U JP19709882 U JP 19709882U JP 19709882 U JP19709882 U JP 19709882U JP S59106265 U JPS59106265 U JP S59106265U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- fine tuning
- automatic fine
- limiter
- tuning circuit
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は、本考案の自動微同調回路を適用したテレビジョン
受像機の一実施例の主要部を示す回路構成図である。
１・・・チューナ、４・・・中間周波増幅回路、８・・
・自動微同調回路、１０・・・中間周波抽出回路、１１
・・・リミッタ回路、１２・・・ゲート回路、１３・・
・位相検波回路、１４・・・低域通過フィルタ。The figure is a circuit configuration diagram showing the main parts of an embodiment of a television receiver to which the automatic fine tuning circuit of the present invention is applied. 1... Tuner, 4... Intermediate frequency amplification circuit, 8...
・Automatic fine tuning circuit, 10...Intermediate frequency extraction circuit, 11
...Limiter circuit, 12...Gate circuit, 13...
- Phase detection circuit, 14...low pass filter.
Claims (1)
送波成分をリミッタ回路にて増幅するととともに振幅制
限されたリミッタ出力を取り出し、該リミッタ出力を位
相検波回路に入力することにより、前記中間周波信号の
中心周波数からの周波数差を電圧変化として示す制御電
圧を検出し、該制御電圧をチューナにＡＦＴ電圧として
印加して周波数制御を行なう自動微同調回路において、
前記リミッタ回路と位相検波回路との間に、帰線期間を
除く期間内での中間周波信号の通過を遮断するゲート回
路を設けてなる自動微同調回路。By extracting the carrier wave component of the video or audio intermediate frequency signal, amplifying the carrier wave component in a limiter circuit, taking out the limiter output whose amplitude has been limited, and inputting the limiter output into the phase detection circuit, the intermediate frequency signal is extracted. In an automatic fine tuning circuit that detects a control voltage that indicates a frequency difference from a center frequency as a voltage change, and performs frequency control by applying the control voltage to a tuner as an AFT voltage,
An automatic fine tuning circuit comprising a gate circuit provided between the limiter circuit and the phase detection circuit to block passage of an intermediate frequency signal within a period excluding a retrace period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19709882U JPS59106265U (en) | 1982-12-31 | 1982-12-31 | automatic fine tuning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19709882U JPS59106265U (en) | 1982-12-31 | 1982-12-31 | automatic fine tuning circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59106265U true JPS59106265U (en) | 1984-07-17 |
Family
ID=30422435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19709882U Pending JPS59106265U (en) | 1982-12-31 | 1982-12-31 | automatic fine tuning circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59106265U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5964980A (en) * | 1982-09-01 | 1984-04-13 | アールシーエー ライセンシング コーポレーシヨン | Tuning controller for television |
-
1982
- 1982-12-31 JP JP19709882U patent/JPS59106265U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5964980A (en) * | 1982-09-01 | 1984-04-13 | アールシーエー ライセンシング コーポレーシヨン | Tuning controller for television |
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