JPS58176419U - AGC circuit in TV receiver - Google Patents
AGC circuit in TV receiverInfo
- Publication number
- JPS58176419U JPS58176419U JP7476882U JP7476882U JPS58176419U JP S58176419 U JPS58176419 U JP S58176419U JP 7476882 U JP7476882 U JP 7476882U JP 7476882 U JP7476882 U JP 7476882U JP S58176419 U JPS58176419 U JP S58176419U
- Authority
- JP
- Japan
- Prior art keywords
- agc
- television receiver
- circuit
- voltage
- band
- 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)
- Control Of Amplification And Gain Control (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ＡＧＣ回路の回路図、第２図は本考案の
一実施例の同回路の回路図、第３図は高周波増幅段のＡ
ＧＣ電圧による減衰の特性図である。
１・・・ＦＥＴ、２・・・フェライト・ビーズ、６・・
・負□ のバンド切換電圧が加わる端子。Fig. 1 is a circuit diagram of a conventional AGC circuit, Fig. 2 is a circuit diagram of the same circuit according to an embodiment of the present invention, and Fig. 3 is a circuit diagram of a high-frequency amplification stage.
It is a characteristic diagram of attenuation by GC voltage. 1...FET, 2...Ferrite beads, 6...
・Terminal to which negative □ band switching voltage is applied.
Claims (3)
高周波増幅段に増幅減衰用として加えるよう構成したテ
レビ受信機において、上記ＡＧＣ電圧に、■ＨＦ帯のロ
ー・バンドとハイ・バンドの切換用の負のバンド切換電
圧を重畳し、上記ＡＧＣ電圧が正から負に亘って変化す
るようにしたことを特徴とするテレビ受信機におけるＡ
ＧＣ回路。(1) In a television receiver configured to apply the AGC voltage from the video intermediate frequency circuit to the high frequency amplification stage of the tuner for amplification and attenuation, the AGC voltage is added to ■ for switching between the low band and high band of the HF band. A in a television receiver characterized in that the AGC voltage changes from positive to negative by superimposing a negative band switching voltage of
GC circuit.
で成り、該ＦＥＴの一方のゲートにアンテナからの入力
電圧が、他方のゲートに上記ＡＧＣ電圧が加わるように
して成ることを特徴とする実用新案登録請求の範囲第１
項記載のテレビ受信機におけるＡＧＣ回路。(2) The above high frequency amplification stage is a dual gate type FET
Utility model registration claim 1, characterized in that the input voltage from the antenna is applied to one gate of the FET, and the above-mentioned AGC voltage is applied to the other gate.
The AGC circuit in the television receiver described in 2.
加えないようにしたこと特徴とする実用新案登録請求の
範囲第２項記載のテレビ受信機におけるＡＧＣ回路。(3) The AGC circuit in a television receiver according to claim 2, characterized in that no bias from a 10B power source is applied to the source of the FET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7476882U JPS58176419U (en) | 1982-05-21 | 1982-05-21 | AGC circuit in TV receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7476882U JPS58176419U (en) | 1982-05-21 | 1982-05-21 | AGC circuit in TV receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58176419U true JPS58176419U (en) | 1983-11-25 |
Family
ID=30084172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7476882U Pending JPS58176419U (en) | 1982-05-21 | 1982-05-21 | AGC circuit in TV receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58176419U (en) |
-
1982
- 1982-05-21 JP JP7476882U patent/JPS58176419U/en active Pending
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