JPS6025224U - variable gain amplifier - Google Patents
variable gain amplifierInfo
- Publication number
- JPS6025224U JPS6025224U JP11616183U JP11616183U JPS6025224U JP S6025224 U JPS6025224 U JP S6025224U JP 11616183 U JP11616183 U JP 11616183U JP 11616183 U JP11616183 U JP 11616183U JP S6025224 U JPS6025224 U JP S6025224U
- Authority
- JP
- Japan
- Prior art keywords
- pair
- differential transistors
- gain amplifier
- variable gain
- variable impedance
- 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
- Amplifiers (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図は従来の可変利得増幅器の一例の回路図、第2図
及び第3図は本考案の実施例を夫々示す図である。
主要部分の符号の説明、5・・・・・・差動増幅回路、
6・・・・・・電流供給用差動回路、7・・・・・・電
流源、D1〜D、・・・・・・ダイオード。FIG. 1 is a circuit diagram of an example of a conventional variable gain amplifier, and FIGS. 2 and 3 are diagrams showing embodiments of the present invention, respectively. Explanation of symbols of main parts, 5...Differential amplifier circuit,
6... Differential circuit for current supply, 7... Current source, D1 to D,... Diode.
Claims (1)
差動トランジスタの出力に接続された一対の負荷抵抗と
、電流に応じてインピーダンスが変化する可変インピー
ダンス素子からなり前記可変インピーダンス素子の各一
端が夫々前記差動トランジスタの出力に接続されて対応
する前記負荷抵抗に流れる電流を夫々分流する一対の分
流路と、前記一対の差動トランジスタへの供給電流と前
記一対の分流路の可変インピーダンス素子の共通接続他
端への供給電流とを外部制御信号に応じて互いに相補的
に変化せしめる手段とからなる可変利得増幅器。A pair of differential transistors that amplify an input signal, a pair of load resistors connected to the outputs of these differential transistors, and a variable impedance element whose impedance changes depending on the current, and one end of each of the variable impedance elements is a pair of shunt paths that are connected to the outputs of the differential transistors and shunt currents flowing through the corresponding load resistors; and a common variable impedance element for supplying current to the pair of differential transistors and the pair of shunt paths. A variable gain amplifier comprising means for changing the current supplied to the other end of the connection in a complementary manner according to an external control signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11616183U JPS6025224U (en) | 1983-07-26 | 1983-07-26 | variable gain amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11616183U JPS6025224U (en) | 1983-07-26 | 1983-07-26 | variable gain amplifier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6025224U true JPS6025224U (en) | 1985-02-20 |
Family
ID=30267887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11616183U Pending JPS6025224U (en) | 1983-07-26 | 1983-07-26 | variable gain amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6025224U (en) |
-
1983
- 1983-07-26 JP JP11616183U patent/JPS6025224U/en active Pending
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