JPS63125476U - - Google Patents
Info
- Publication number
- JPS63125476U JPS63125476U JP1499487U JP1499487U JPS63125476U JP S63125476 U JPS63125476 U JP S63125476U JP 1499487 U JP1499487 U JP 1499487U JP 1499487 U JP1499487 U JP 1499487U JP S63125476 U JPS63125476 U JP S63125476U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- circuit
- broadcast
- receiving
- trap
- 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.)
- Granted
Links
- 230000010363 phase shift Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は本考案の一実施例におけるＡＦＴ回路
の回路図、第２図は他の実施例におけるＡＦＴ回
路の回路図、第３図イ，ロはＰＡＬ及びＳＥＣＡ
Ｍ放送の周波数関係を示す図、第４図イ，ロは、
ＰＡＬ及びＳＥＣＡＭ放送受信時におけるＡＦＴ
のＳ字特性図である。
１…ＶＩＦ用ＩＣ、２，３…制御端子、Ｃ１，
Ｃ２，Ｃ３…第１、第２、第３コンデンサ、Ｌ１
，Ｌ２…第１、第２コイル、Ｄ１，Ｄ２，Ｄ３…
第１、第２、第３ダイオード。
Fig. 1 is a circuit diagram of an AFT circuit in one embodiment of the present invention, Fig. 2 is a circuit diagram of an AFT circuit in another embodiment, and Fig. 3 A and B are PAL and SECA circuit diagrams.
A diagram showing the frequency relationship of M broadcasting, Figure 4 A and B are as follows:
AFT when receiving PAL and SECAM broadcasts
FIG. 1...VIF IC, 2, 3...Control terminal, C1,
C2, C3...first, second, third capacitor, L1
, L2...first and second coils, D1, D2, D3...
First, second and third diodes.
Claims (1)
波数が低く設定され、第２の放送受信時はＶＩＦ
周波数よりＳＩＦ周波数が高く設定されるテレビ
ジヨン受像機において、前記第１の放送受信時の
ＶＩＦ周波数に共振する第１共振回路と、この第
１共振回路と相俟つて第１トラツプ周波数に共振
する第１トラツプ回路と、前記第２の放送受信時
のＶＩＦ周波数に共振する第２共振回路と、この
第２共振回路と相俟つて第２トラツプ周波数に共
振する第２トラツプ回路と、前記第１の放送受信
時は前記第１共振回路及び前記第１トラツプ回路
を、第２の放送受信時は前記第２共振回路及び前
記第２トラツプ回路を夫々移相回路とするクオー
ドラチヤ検波回路とからなるＡＦＴ回路。 When receiving the first broadcast, the SIF frequency is set lower than the VIF frequency, and when receiving the second broadcast, the SIF frequency is set lower than the VIF frequency.
In a television receiver in which the SIF frequency is set higher than the SIF frequency, a first resonant circuit that resonates at the VIF frequency when receiving the first broadcast, and a first resonant circuit that together resonates at the first trap frequency. a first trap circuit; a second resonant circuit that resonates at the VIF frequency when receiving the second broadcast; a second trap circuit that resonates at the second trap frequency in conjunction with the second resonant circuit; AFT comprising a quadrature detection circuit which uses the first resonant circuit and the first trap circuit as phase shift circuits when receiving a broadcast, and uses the second resonant circuit and the second trap circuit as phase shift circuits when receiving a second broadcast. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1499487U JPH0753337Y2 (en) | 1987-02-04 | 1987-02-04 | AFT circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1499487U JPH0753337Y2 (en) | 1987-02-04 | 1987-02-04 | AFT circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63125476U true JPS63125476U (en) | 1988-08-16 |
| JPH0753337Y2 JPH0753337Y2 (en) | 1995-12-06 |
Family
ID=30805510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1499487U Expired - Lifetime JPH0753337Y2 (en) | 1987-02-04 | 1987-02-04 | AFT circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753337Y2 (en) |
-
1987
- 1987-02-04 JP JP1499487U patent/JPH0753337Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0753337Y2 (en) | 1995-12-06 |
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