JPS6025249U - Video intermediate frequency amplification circuit - Google Patents
Video intermediate frequency amplification circuitInfo
- Publication number
- JPS6025249U JPS6025249U JP11665483U JP11665483U JPS6025249U JP S6025249 U JPS6025249 U JP S6025249U JP 11665483 U JP11665483 U JP 11665483U JP 11665483 U JP11665483 U JP 11665483U JP S6025249 U JPS6025249 U JP S6025249U
- Authority
- JP
- Japan
- Prior art keywords
- intermediate frequency
- switching element
- video intermediate
- amplification circuit
- frequency amplification
- 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
- Noise Elimination (AREA)
- Superheterodyne Receivers (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図は従来の映像中間周波増幅回路、第２図はこの考
案の一実施例を示す回路図、第３図は第２図の回路動作
を説明するのに示したＡＧＣ電圧対入力電界特性図であ
る。
１３・・・弾性表面波フィルタ、１４・・・出力電極共
振用コイル、１５・・・出力電極負荷抵抗、１７・・・
増幅器、１８・・・検出スイッチング回路、１９・・・
スイッチング素子、２０．２１・・・トランジスタ。Figure 1 shows a conventional video intermediate frequency amplification circuit, Figure 2 is a circuit diagram showing an embodiment of this invention, and Figure 3 shows AGC voltage vs. input electric field characteristics to explain the circuit operation of Figure 2. It is a diagram. 13...Surface acoustic wave filter, 14...Output electrode resonance coil, 15...Output electrode load resistance, 17...
Amplifier, 18... Detection switching circuit, 19...
Switching element, 20.21...transistor.
Claims (1)
対の出力電極間に接続される出力電極共振コイル及び出
力電極負荷抵抗と、前記一対の出力電極間に接続された
スイッチング素子と、電界強度の変化に応じて前記スイ
ッチング素子を制御し、弱電界時には前記スイッチング
素子をオン状１、態にする手段とを具備したことを特徴
とする映像中間周波増幅回路。An output electrode resonance coil and an output electrode load resistance connected between a pair of output electrodes of a surface acoustic wave filter to which a video intermediate frequency signal is input, a switching element connected between the pair of output electrodes, and an electric field strength A video intermediate frequency amplification circuit comprising means for controlling the switching element according to a change in the switching element and turning the switching element into an ON state (1) when a weak electric field is present.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11665483U JPS6025249U (en) | 1983-07-27 | 1983-07-27 | Video intermediate frequency amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11665483U JPS6025249U (en) | 1983-07-27 | 1983-07-27 | Video intermediate frequency amplification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6025249U true JPS6025249U (en) | 1985-02-20 |
Family
ID=30268829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11665483U Pending JPS6025249U (en) | 1983-07-27 | 1983-07-27 | Video intermediate frequency amplification circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025249U (en) |
-
1983
- 1983-07-27 JP JP11665483U patent/JPS6025249U/en active Pending
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