JPS58114674U - Frequency characteristic control circuit - Google Patents
Frequency characteristic control circuitInfo
- Publication number
- JPS58114674U JPS58114674U JP941782U JP941782U JPS58114674U JP S58114674 U JPS58114674 U JP S58114674U JP 941782 U JP941782 U JP 941782U JP 941782 U JP941782 U JP 941782U JP S58114674 U JPS58114674 U JP S58114674U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency characteristic
- filters
- control circuit
- characteristic control
- 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
Landscapes
- Television Systems (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はテレビジョン受像機のチューナ回路と中間周波
段間の伝送周波数特性を示す特性図、第、２図は本考案
に係る周波数特性制御回路のブロック図、第３図はチュ
ーナ回路で上記回路が周波数制御する場合を具体的にモ
デル化して示す回路図である。 ゛
９・・・高域バンドパスフィルタ、１０・・・第１検波
器、１１・・・低域バンドパスフィルタ、１２・・・第
２検波器、１３・・・比較器、Ｔｒｌ、’ Ｔｒ２・・
・トランジスタ、ＬＣ・・・並列共振回路。Figure 1 is a characteristic diagram showing the transmission frequency characteristics between the tuner circuit and intermediate frequency stage of a television receiver, Figures 2 and 2 are block diagrams of the frequency characteristic control circuit according to the present invention, and Figure 3 is the tuner circuit shown above. FIG. 2 is a circuit diagram specifically modeling a case where the circuit performs frequency control.゛9... High band pass filter, 10... First detector, 11... Low band pass filter, 12... Second detector, 13... Comparator, Trl, ' Tr2・・・
・Transistor, LC...Parallel resonant circuit.
Claims (1)
多重信号を受信できるテレビジョン受像機において、映
像検波出力の文字信号基本波を含む高域成分をフィルタ
リングする高域バンドパスフィルタ、前記映像検波出力
の低域成分をフィルタリングする低域バンドパスフィル
タ、これら各フィルタを１過した信号を検波する第１及
び第２検波器、第１及び第２検波器が検出した出力を比
較入力して前記映像検波出力の周波数特性の高域成分を
制御する比較器とから構成される周波数特性制御回1. In a television receiver capable of receiving a text multiplex signal in which a text signal is multiplexed on a television signal, a high band pass filter that filters high frequency components including the text signal fundamental wave of the video detection output; A low band pass filter that filters the low frequency components of the filter, first and second detectors that detect the signal that has passed through each of these filters, and the outputs detected by the first and second detectors are compared and input to generate the image. A frequency characteristic control circuit consisting of a comparator that controls the high frequency component of the frequency characteristic of the detection output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP941782U JPS58114674U (en) | 1982-01-28 | 1982-01-28 | Frequency characteristic control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP941782U JPS58114674U (en) | 1982-01-28 | 1982-01-28 | Frequency characteristic control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58114674U true JPS58114674U (en) | 1983-08-05 |
Family
ID=30022054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP941782U Pending JPS58114674U (en) | 1982-01-28 | 1982-01-28 | Frequency characteristic control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58114674U (en) |
-
1982
- 1982-01-28 JP JP941782U patent/JPS58114674U/en active Pending
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