JPH0394827U - - Google Patents
Info
- Publication number
- JPH0394827U JPH0394827U JP427390U JP427390U JPH0394827U JP H0394827 U JPH0394827 U JP H0394827U JP 427390 U JP427390 U JP 427390U JP 427390 U JP427390 U JP 427390U JP H0394827 U JPH0394827 U JP H0394827U
- Authority
- JP
- Japan
- Prior art keywords
- aft circuit
- sensitivity
- frequency
- frequency pull
- switching means
- 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
- 230000035945 sensitivity Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Receiver Circuits (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
第１図は本考案のＡＦＴ回路の一実施例を示す
回路図、第２図はＡＦＴ回路の従来例を示す回路
図である。
２０……引き込み感度制御回路、Ｒ４，Ｒ５…
…抵抗（調整手段）、ＳＷ１……スイツチ（切換
手段）。
FIG. 1 is a circuit diagram showing an embodiment of the AFT circuit of the present invention, and FIG. 2 is a circuit diagram showing a conventional example of the AFT circuit. 20...Retraction sensitivity control circuit, R4 , R5 ...
...Resistance (adjustment means), SW1...Switch (switching means).
Claims (1)
ン放送を受信できる映像機器の中間周波数を常に
一定に保持するためのＡＦＴ回路において、 前記ＡＦＴ回路の周波数引き込み感度を変化さ
せる調整手段と、 前記調整手段により、受信しようとするテレビ
ジヨン放送の放送方式に応じて前記周波数引き込
み感度を切り換える切換手段と、 を有することを特徴とするＡＦＴ回路。 (2) 前記切換手段が、受信しようとするテレビ
ジヨン放送の放送方式に応じて前記ＡＦＴ回路の
周波数引き込み感度をＭ方式に対応した周波数引
き込み感度とＭ方式以外の方式に対応した周波数
引き込み感度のうちのいずれかに切り換える切換
手段である第１請求項記載のＡＦＴ回路。[Claims for Utility Model Registration] (1) In an AFT circuit for always maintaining a constant intermediate frequency of video equipment capable of receiving television broadcasts of multiple broadcasting systems including the M system, the frequency pull-in sensitivity of the AFT circuit. An AFT circuit comprising: an adjusting means for changing the frequency; and a switching means for changing the frequency pull-in sensitivity according to a broadcasting system of a television broadcast to be received by the adjusting means. (2) The switching means changes the frequency pull-in sensitivity of the AFT circuit to a frequency pull-in sensitivity corresponding to the M-type and a frequency pull-in sensitivity corresponding to a type other than the M-type depending on the broadcast system of the television broadcast to be received. The AFT circuit according to claim 1, wherein the AFT circuit is a switching means for switching to either one of the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP427390U JPH0394827U (en) | 1990-01-19 | 1990-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP427390U JPH0394827U (en) | 1990-01-19 | 1990-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0394827U true JPH0394827U (en) | 1991-09-27 |
Family
ID=31508024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP427390U Pending JPH0394827U (en) | 1990-01-19 | 1990-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0394827U (en) |
-
1990
- 1990-01-19 JP JP427390U patent/JPH0394827U/ja active Pending
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