JPS6213011U - - Google Patents
Info
- Publication number
- JPS6213011U JPS6213011U JP10323585U JP10323585U JPS6213011U JP S6213011 U JPS6213011 U JP S6213011U JP 10323585 U JP10323585 U JP 10323585U JP 10323585 U JP10323585 U JP 10323585U JP S6213011 U JPS6213011 U JP S6213011U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- agc
- uhf
- vhf
- amplifier circuits
- 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
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の一実施例をテレビジヨン受像
機の要部と共に示すブロツク図、第２図ａはその
要部の具体的回路図、第２図ｂはそのＵＨＦ受信
時の等価回路図、第３図は本考案の他の実施例を
示す要部回路図、第４図は従来のＡＧＣ回路を使
用したテレビジヨン受像機の要部を示すブロツク
図である。
１：ＶＨＦチユーナ、４：ＵＨＦチユーナ、９
：ＡＧＣ電圧変換部、１１：チユーナ電源切換ス
イツチ。
Fig. 1 is a block diagram showing an embodiment of the present invention together with the main parts of a television receiver, Fig. 2a is a specific circuit diagram of the main parts, and Fig. 2b is an equivalent circuit diagram at the time of UHF reception. 3 is a circuit diagram of a main part showing another embodiment of the present invention, and FIG. 4 is a block diagram showing a main part of a television receiver using a conventional AGC circuit. 1: VHF tuner, 4: UHF tuner, 9
: AGC voltage converter, 11: Tuner power selection switch.
Claims (1)
えられるＵＨＦ，ＲＦ増幅回路とＶＨＦ，ＲＦ増
幅回路を備え、この各ＲＦ増幅回路を選択的に動
作させてＵＨＦ，ＶＨＦ各信号を受信するように
したテレビジヨンチユーナに於いて、ＶＨＦ受信
時とＵＨＦ受信時の切換えに連動して前記ＡＧＣ
電圧に重畳する直流電圧の大きさを切換えるよう
に構成したテレビジヨンチユーナのＡＧＣ回路。 (2) 前記直流電圧は前記各ＲＦ増幅回路に選択
的に供給される電源電圧であり、この電源電圧が
ＵＨＦ受信時またはＶＨＦ受信時の何れか一方の
受信時のみ前記ＡＧＣ電圧に重畳されるようにし
たことを特徴とする実用新案登録請求の範囲第１
項記載のテレビジヨンチユーナのＡＧＣ回路。[Claims for Utility Model Registration] (1) UHF, RF amplifier circuits and VHF, RF amplifier circuits to which AGC voltage is applied from the same AGC voltage source are provided, and each RF amplifier circuit is selectively operated to generate UHF , VHF signals, the above-mentioned AGC is activated in conjunction with switching between VHF reception and UHF reception.
An AGC circuit for a television tuner configured to switch the magnitude of the DC voltage superimposed on the voltage. (2) The DC voltage is a power supply voltage that is selectively supplied to each of the RF amplifier circuits, and this power supply voltage is superimposed on the AGC voltage only when receiving either UHF or VHF. Claim 1 for utility model registration characterized by:
The AGC circuit of the TV station described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10323585U JPS6213011U (en) | 1985-07-05 | 1985-07-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10323585U JPS6213011U (en) | 1985-07-05 | 1985-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6213011U true JPS6213011U (en) | 1987-01-26 |
Family
ID=30975601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10323585U Pending JPS6213011U (en) | 1985-07-05 | 1985-07-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6213011U (en) |
-
1985
- 1985-07-05 JP JP10323585U patent/JPS6213011U/ja active Pending
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