JPS60174373U - Television signal receiving circuit - Google Patents
Television signal receiving circuitInfo
- Publication number
- JPS60174373U JPS60174373U JP6214184U JP6214184U JPS60174373U JP S60174373 U JPS60174373 U JP S60174373U JP 6214184 U JP6214184 U JP 6214184U JP 6214184 U JP6214184 U JP 6214184U JP S60174373 U JPS60174373 U JP S60174373U
- Authority
- JP
- Japan
- Prior art keywords
- receiving circuit
- signal receiving
- signal
- television signal
- local oscillation
- 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 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
第１図は本考案第１の実施例の回路ブロック図、第２図
は第１図の要部波形図、第３図は第２実施例の回路ブロ
ック図、第４図は第３図の動作説明の為の説明図、第４
図は、受信回路の回路ブロック図である。
ＶＴＵ、 ＶＦＴ・・・・・・制御信号、９・・・・・
・ＡＦＴフィルタ、５・・・・・・チューニング電圧フ
ィルタ、２１．３５・・・・・・時定数変更回路。Fig. 1 is a circuit block diagram of the first embodiment of the present invention, Fig. 2 is a waveform diagram of the main part of Fig. 1, Fig. 3 is a circuit block diagram of the second embodiment, and Fig. 4 is a circuit block diagram of Fig. 3. Explanatory diagram for explaining operation, 4th
The figure is a circuit block diagram of a receiving circuit. VTU, VFT...Control signal, 9...
- AFT filter, 5...Tuning voltage filter, 21.35...Time constant changing circuit.
Claims (1)
信号に変換し、該正信号より直接ＳＩＦ信号を導出して
復調するセパレートキャリア方式のテレビジョン信号受
信回路において、前記局部発振回路の発振周波数を制御
する制御信号の発生源と、該制御信号をローパスフィル
タを介して前記局部発振回路に供給する手段と、チャン
ネル切換時に所定時間前記ローパスフィルタの時定数を
小とする手段とを備えることを特徴とするテレビジョン
信号受信回路。In a separate carrier type television signal receiving circuit that converts an RF positive signal from an antenna into a positive signal based on the local oscillation circuit output, and directly derives and demodulates an SIF signal from the positive signal, the oscillation frequency of the local oscillation circuit is It is characterized by comprising a source of a control signal to be controlled, means for supplying the control signal to the local oscillation circuit via a low-pass filter, and means for reducing the time constant of the low-pass filter for a predetermined period of time when switching channels. television signal receiving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6214184U JPS60174373U (en) | 1984-04-25 | 1984-04-25 | Television signal receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6214184U JPS60174373U (en) | 1984-04-25 | 1984-04-25 | Television signal receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60174373U true JPS60174373U (en) | 1985-11-19 |
Family
ID=30591072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6214184U Pending JPS60174373U (en) | 1984-04-25 | 1984-04-25 | Television signal receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60174373U (en) |
-
1984
- 1984-04-25 JP JP6214184U patent/JPS60174373U/en active Pending
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