JPS6150324U - - Google Patents
Info
- Publication number
- JPS6150324U JPS6150324U JP13517884U JP13517884U JPS6150324U JP S6150324 U JPS6150324 U JP S6150324U JP 13517884 U JP13517884 U JP 13517884U JP 13517884 U JP13517884 U JP 13517884U JP S6150324 U JPS6150324 U JP S6150324U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- equalizer
- riaa
- input terminal
- feedback amount
- 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
Description
第１図は本考案に係る利得切替回路の実施例を
示す回路図、第２図は従来の利得切替回路を示す
回路図である。
Ａ：増幅器、Ｂ：逆相入力端、１：帰還量切り
替え部としてのスイツチ、Ｒ１：第１の抵抗、Ｒ
２：第２の抵抗、Ｒ３：第３の抵抗、Ｅ：ＲＩＡ
Ａイコライザー。
FIG. 1 is a circuit diagram showing an embodiment of a gain switching circuit according to the present invention, and FIG. 2 is a circuit diagram showing a conventional gain switching circuit. A: Amplifier, B: Negative phase input terminal, 1: Switch as feedback amount switching section, R 1 : First resistor, R
2 : second resistor, R3 : third resistor, E: RIA
A equalizer.
Claims (1)
還量切り替え部とを介して上記増幅器の逆相入力
端に入力されるようになつている利得切替回路で
あつて、 上記逆相入力端は直列接続された第１及び第２
の抵抗の中点に接続されており、上記第１の抵抗
の他端はＲＩＡＡイコライザーの出力端に接続さ
れ、第２の抵抗の他端は第３の抵抗を介してアー
スに接続されていて、上記帰還量切り替え部は上
記中点をコモンとして上記ＲＩＡＡイコライザー
の出力端と上記第２及び第３の抵抗の中点とで選
択的に切り替え接続できるように構成されている
ことを特徴とする利得切替回路。[Claims for Utility Model Registration] A gain switching circuit in which an output signal of an amplifier is inputted to an anti-phase input terminal of the amplifier via an RIAA equalizer and a feedback amount switching section, The input terminal is the first and second connected in series.
The other end of the first resistor is connected to the output end of the RIAA equalizer, and the other end of the second resistor is connected to ground via a third resistor. , the feedback amount switching unit is configured to selectively switch and connect between the output terminal of the RIAA equalizer and the midpoints of the second and third resistors, with the midpoint as a common. Gain switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13517884U JPS6150324U (en) | 1984-09-07 | 1984-09-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13517884U JPS6150324U (en) | 1984-09-07 | 1984-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6150324U true JPS6150324U (en) | 1986-04-04 |
Family
ID=30693677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13517884U Pending JPS6150324U (en) | 1984-09-07 | 1984-09-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6150324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02226324A (en) * | 1989-02-27 | 1990-09-07 | Fuji Xerox Co Ltd | Keyboard input processor |
-
1984
- 1984-09-07 JP JP13517884U patent/JPS6150324U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02226324A (en) * | 1989-02-27 | 1990-09-07 | Fuji Xerox Co Ltd | Keyboard input processor |