JPS625714U - - Google Patents
Info
- Publication number
- JPS625714U JPS625714U JP9677685U JP9677685U JPS625714U JP S625714 U JPS625714 U JP S625714U JP 9677685 U JP9677685 U JP 9677685U JP 9677685 U JP9677685 U JP 9677685U JP S625714 U JPS625714 U JP S625714U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output end
- amplifier circuit
- resistor
- amplifier
- 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 2
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は、本考案のＲＦ段の利得調整回路の一
実施例の回路図であり、第２図は、従来のＲＦ段
の利得調整回路の一例の回路図である。
１：ＲＦ同調回路、２：ＲＦトランス２次側コ
イル、４，９：抵抗、６：トランジスタ、８：増
幅回路、ｓ：ＲＦトランス２次側コイルの出力端
、ｉ：増幅回路の入力端、ｏ：増幅回路の出力端
、Ｂ：電源。
FIG. 1 is a circuit diagram of an embodiment of an RF stage gain adjustment circuit of the present invention, and FIG. 2 is a circuit diagram of an example of a conventional RF stage gain adjustment circuit. 1: RF tuning circuit, 2: RF transformer secondary coil, 4, 9: resistor, 6: transistor, 8: amplifier circuit, s: output terminal of RF transformer secondary coil, i: input terminal of amplifier circuit, o: Output end of the amplifier circuit, B: Power supply.
Claims (1)
力端を増幅回路の入力端に接続し、この増幅回路
の出力端を混合回路に接続し、さらに前記増幅回
路の出力端を第１の抵抗を介して電源に接続する
とともに、第２の抵抗とＬｏ／Ｄｘ切換信号で制
御されるスイツチング素子とを直列に介して接地
して構成したことを特徴とするＲＦ段の利得調整
回路。 The output end of the RF transformer secondary coil of the RF tuning circuit is connected to the input end of an amplifier circuit, the output end of this amplifier circuit is connected to a mixing circuit, and the output end of the amplifier circuit is connected through a first resistor. 1. A gain adjustment circuit for an RF stage, characterized in that the circuit is connected to a power source, and is grounded via a second resistor and a switching element controlled by a Lo/Dx switching signal connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9677685U JPS625714U (en) | 1985-06-27 | 1985-06-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9677685U JPS625714U (en) | 1985-06-27 | 1985-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS625714U true JPS625714U (en) | 1987-01-14 |
Family
ID=30962918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9677685U Pending JPS625714U (en) | 1985-06-27 | 1985-06-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS625714U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939762B2 (en) * | 1977-02-16 | 1984-09-26 | シャープ株式会社 | Connection and fixing method of flexible substrate |
-
1985
- 1985-06-27 JP JP9677685U patent/JPS625714U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939762B2 (en) * | 1977-02-16 | 1984-09-26 | シャープ株式会社 | Connection and fixing method of flexible substrate |
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