JPS5877915U - Level adjustment circuit - Google Patents
Level adjustment circuitInfo
- Publication number
- JPS5877915U JPS5877915U JP17362381U JP17362381U JPS5877915U JP S5877915 U JPS5877915 U JP S5877915U JP 17362381 U JP17362381 U JP 17362381U JP 17362381 U JP17362381 U JP 17362381U JP S5877915 U JPS5877915 U JP S5877915U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- attenuator
- amplifier
- adjustment circuit
- level adjustment
- 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
- Networks Using Active Elements (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、第２図は従来のレベル調整回路を示す回路図、
第３図は本考案の一実施例を示す回路図、第４図は第３
図の動作を説明するための回路図である。
１・・・・・・増幅器、２． ２−１．〜２−ｎ・・・
・・・抵抗減衰器部分、３・・・・・・平衡形抵抗減衰
器、４．４−１、 ４−２・・・・・・増幅器の出力抵
抗、５・・・・・・負荷。Figures 1 and 2 are circuit diagrams showing conventional level adjustment circuits;
Fig. 3 is a circuit diagram showing one embodiment of the present invention, and Fig. 4 is a circuit diagram showing an embodiment of the present invention.
FIG. 3 is a circuit diagram for explaining the operation shown in the figure. 1...Amplifier, 2. 2-1. ~2-n...
... Resistance attenuator section, 3... Balanced resistance attenuator, 4.4-1, 4-2... Output resistance of amplifier, 5... Load.
Claims (1)
の抵抗減衰器部分を組合わせた平衡形抵抗減衰器とから
なるレベル調整回路において、前記抵抗減衰器部分を、
第１１第２、第３の抵抗器より構成し、前記第１の抵抗
器の二端は、抵抗減衰器部分の入力端子の一方に、他端
は第３の抵抗器の一端および抵抗減衰器部分の出力端子
の一方に共通接続し、前記第２の抵抗器の一端は、抵抗
減衰器部分の入力端子の他方に、他端は第３の抵抗器の
他端および抵抗減衰器部分の出力端子の他方に共通接続
し、かつ前記増幅器出力インピーダンスをＺ。、平衡形
抵抗減衰器出力インピーダンスをＺｏ、第１、第２、第
３の抵抗器の値をそれぞれＲｌｎ、 Ｒ２ｎ、 Ｒ３ｎ
としたとき、ｌ ／Ｚｏ＝ ｌ ／（Ｚｏ＋ Ｒｌｎ
＋Ｒ２ｎ）＋ ｌ ／Ｒ３ｎ（ｎは正の整数）なる関係
にしたことを特徴とするレベル調整回路。In a level adjustment circuit comprising an amplifier and a balanced resistance attenuator combining a plurality of resistance attenuator sections to adjust the output level of the amplifier, the resistance attenuator section is
11 Consisting of second and third resistors, two ends of the first resistor are connected to one of the input terminals of the resistance attenuator section, and the other end is connected to one end of the third resistor and the resistance attenuator section. one end of the second resistor is connected to the other input terminal of the resistive attenuator part, and the other end is connected to the other end of the third resistor and the output terminal of the resistive attenuator part. common connection to the other terminal, and the amplifier output impedance to Z. , the output impedance of the balanced resistor attenuator is Zo, and the values of the first, second, and third resistors are Rln, R2n, and R3n, respectively.
When, l /Zo= l /(Zo+ Rln
+R2n)+l/R3n (n is a positive integer).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17362381U JPS5877915U (en) | 1981-11-20 | 1981-11-20 | Level adjustment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17362381U JPS5877915U (en) | 1981-11-20 | 1981-11-20 | Level adjustment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5877915U true JPS5877915U (en) | 1983-05-26 |
Family
ID=29965496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17362381U Pending JPS5877915U (en) | 1981-11-20 | 1981-11-20 | Level adjustment circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5877915U (en) |
-
1981
- 1981-11-20 JP JP17362381U patent/JPS5877915U/en active Pending
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