JPS635718U - - Google Patents
Info
- Publication number
- JPS635718U JPS635718U JP9815286U JP9815286U JPS635718U JP S635718 U JPS635718 U JP S635718U JP 9815286 U JP9815286 U JP 9815286U JP 9815286 U JP9815286 U JP 9815286U JP S635718 U JPS635718 U JP S635718U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- series
- passed
- gain
- current
- 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 6
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の一実施例の利得制御回路の回
路図、第２図は本考案の他の実施例の回路図、第
３図は本考案の更に他の実施例の回路図、第４図
は本考案の更に他の実施例の回路図、第５図は本
考案の更にまた他の実施例の回路図、第６図は制
御電流比と利得の特性図である。
（符号の説明）、１，２，３，４，５……利得
制御回路、Ｑ１，Ｑ２，Ｑ３，Ｑ４……トランジ
スタ、Ｄ１，Ｄ２……ダイオード、Ｒ１，Ｒ２…
…抵抗、Ｖｂ……バイアス電圧、Ａ，Ｂ……電流
調整回路、Ｓ……信号源、Ｉｓ……入力電流信号
、Ｉｏ……出力電流信号。
FIG. 1 is a circuit diagram of a gain control circuit according to one embodiment of the present invention, FIG. 2 is a circuit diagram of another embodiment of the present invention, and FIG. 3 is a circuit diagram of still another embodiment of the present invention. FIG. 4 is a circuit diagram of still another embodiment of the present invention, FIG. 5 is a circuit diagram of still another embodiment of the present invention, and FIG. 6 is a characteristic diagram of control current ratio and gain. (Explanation of symbols), 1, 2, 3, 4, 5...Gain control circuit, Q1 , Q2 , Q3 , Q4 ...Transistor, D1 , D2 ...Diode, R1 , R2 …
...resistance, V b ... bias voltage, A, B ... current adjustment circuit, S ... signal source, I s ... input current signal, I o ... output current signal.
Claims (1)
、そのエミツタ側から入力信号が印加され、コレ
クタ側に出力される回路において、 各々のトランジスタのベースにダイオード手段
と抵抗手段を直列接続した直列回路をそれぞれ接
続し、かつそれら直列回路を同一バイアス点に接
続し、一方の直列回路には基準電流を流し、他方
の直列回路には制御電流を流し、前記基準電流と
制御電流の比の調節によつて回路利得を制御する
ことを特徴とする利得制御回路。[Claims for Utility Model Registration] In a circuit in which the emitters of a pair of transistors are coupled to each other, an input signal is applied from the emitter side and output to the collector side, a diode means and a resistor means are connected in series to the base of each transistor. The connected series circuits are connected respectively, and the series circuits are connected to the same bias point, a reference current is passed through one series circuit, a control current is passed through the other series circuit, and the difference between the reference current and the control current is A gain control circuit characterized in that the circuit gain is controlled by adjusting the ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9815286U JPS635718U (en) | 1986-06-26 | 1986-06-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9815286U JPS635718U (en) | 1986-06-26 | 1986-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS635718U true JPS635718U (en) | 1988-01-14 |
Family
ID=30965826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9815286U Pending JPS635718U (en) | 1986-06-26 | 1986-06-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS635718U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0483337U (en) * | 1990-11-30 | 1992-07-20 | ||
| JP2006197227A (en) * | 2005-01-13 | 2006-07-27 | Renesas Technology Corp | Variable gain amplifier circuit, receiver, and transmitter |
-
1986
- 1986-06-26 JP JP9815286U patent/JPS635718U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0483337U (en) * | 1990-11-30 | 1992-07-20 | ||
| JP2006197227A (en) * | 2005-01-13 | 2006-07-27 | Renesas Technology Corp | Variable gain amplifier circuit, receiver, and transmitter |