JPS6121134U - VHF tuner input circuit - Google Patents
VHF tuner input circuitInfo
- Publication number
- JPS6121134U JPS6121134U JP10467284U JP10467284U JPS6121134U JP S6121134 U JPS6121134 U JP S6121134U JP 10467284 U JP10467284 U JP 10467284U JP 10467284 U JP10467284 U JP 10467284U JP S6121134 U JPS6121134 U JP S6121134U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- switching diode
- input circuit
- band
- vhf tuner
- 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
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図ないし第６図は本考案の実施例に係り、第１図は
この実施例の回路図、第２図は他の高周波増幅回路例の
要部回路図、第３図はハイバンド信号受信時の入力同調
回路の等価回路図、第４図はローバンド信号受信時の入
力同調回路の等価回路図、第５図はハイバンド信号受信
時の選択度特性図、第６図はローバンド信号受信時の選
択度特性図、第７図は従来例の回路図である。
１０は団正信号除去用フィルタ、１１は誘導Ｍ型フィル
タ、１２はＩＦトラップフィルタ、１３は入力同調回路
、１４は高周波増幅回路。1 to 6 relate to an embodiment of the present invention, FIG. 1 is a circuit diagram of this embodiment, FIG. 2 is a main circuit diagram of another example of a high frequency amplification circuit, and FIG. 3 is a high band signal Fig. 4 is an equivalent circuit diagram of the input tuning circuit when receiving a low band signal, Fig. 5 is a selectivity characteristic diagram when receiving a high band signal, Fig. 6 is a diagram of the selectivity characteristic when receiving a low band signal. FIG. 7 is a circuit diagram of a conventional example. Reference numeral 10 denotes a filter for removing a signal, 11 an induction M type filter, 12 an IF trap filter, 13 an input tuning circuit, and 14 a high frequency amplification circuit.
Claims (1)
切り換え用ダイオードと、前記ハンド切り換え用ダイオ
ードに導通電圧を与えるための電源端子とを設け、ＶＨ
Ｆの７）イパンド信号受信時は前記電源端子を介して電
源電圧が供給されてハンド切り換え用ダイオードが導通
させられ、ローパッド信号受信時には前記電源電圧の供
給が停止されてバンド切り換え用ダイオードが遮断され
ることによりバンド切り換え用ダイオードのスイッチン
グ動作が行なわれることを特徴とするＶＨＦチューナの
入力回路。An input tuning circuit is provided, and this input tuning circuit is provided with a positive band switching diode and a power supply terminal for applying a conduction voltage to the hand switching diode, and the VH
F7) When receiving a high pad signal, a power supply voltage is supplied through the power supply terminal to make the hand switching diode conductive, and when receiving a low pad signal, the supply of the power supply voltage is stopped and the band switching diode is cut off. An input circuit for a VHF tuner, characterized in that a switching operation of a band switching diode is performed by switching the band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10467284U JPS6121134U (en) | 1984-07-10 | 1984-07-10 | VHF tuner input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10467284U JPS6121134U (en) | 1984-07-10 | 1984-07-10 | VHF tuner input circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6121134U true JPS6121134U (en) | 1986-02-07 |
Family
ID=30664010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10467284U Pending JPS6121134U (en) | 1984-07-10 | 1984-07-10 | VHF tuner input circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6121134U (en) |
-
1984
- 1984-07-10 JP JP10467284U patent/JPS6121134U/en active Pending
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