JPH048524U - - Google Patents
Info
- Publication number
- JPH048524U JPH048524U JP4764290U JP4764290U JPH048524U JP H048524 U JPH048524 U JP H048524U JP 4764290 U JP4764290 U JP 4764290U JP 4764290 U JP4764290 U JP 4764290U JP H048524 U JPH048524 U JP H048524U
- Authority
- JP
- Japan
- Prior art keywords
- impedance
- fet
- buffer
- source
- 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
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案に係る高入力インピーダンス・
バツフアの原理構成図、第２図は本考案の具体例
を示す構成図、第３図は第２図に示す回路の等価
回路、第４図は従来の高入力インピーダンス・バ
ツフアの一例を示す図、第５図は第４図をモデル
化した回路、第６図は第５図の等価回路である。
Ｑ……ＦＥＴ、ＹＣ……補償アドミツタンス、
ＣＢ……電流バツフア、ＣＳ……直流電流源、Ｚ
Ｌ……負荷。
Figure 1 shows the high input impedance system according to the present invention.
Figure 2 is a configuration diagram showing a specific example of the present invention, Figure 3 is an equivalent circuit of the circuit shown in Figure 2, and Figure 4 is a diagram showing an example of a conventional high input impedance buffer. , FIG. 5 is a circuit modeled after FIG. 4, and FIG. 6 is an equivalent circuit of FIG. Q...FET, YC...compensation admittance,
CB...Current buffer, CS...DC current source, Z
L...Load.
Claims (1)
、負荷インピーダンスの逆数に等しい補償アドミ
ツタンスと、 入力インピーダンスが極めて小さく出力インピ
ーダンスが無限大であり、かつ電流ゲインが１の
電流バツフア を備え、この補償アドミツタンスと電流バツフア
を直列接続して前記ＦＥＴのゲート・ソース間に
接続し、負性入力インピーダンスを自動的に相殺
することができるように構成したことを特徴とす
る高入力インピーダンス・バツフア。[Scope of Claim for Utility Model Registration] A current buffer that is a FET source-follower type buffer and has a compensation admittance equal to the reciprocal of the load impedance, an input impedance that is extremely small, an output impedance that is infinite, and a current gain of 1. The compensation admittance and the current buffer are connected in series between the gate and source of the FET, and the negative input impedance is automatically canceled out.・Batsuhua.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4764290U JPH048524U (en) | 1990-05-09 | 1990-05-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4764290U JPH048524U (en) | 1990-05-09 | 1990-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH048524U true JPH048524U (en) | 1992-01-27 |
Family
ID=31563752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4764290U Pending JPH048524U (en) | 1990-05-09 | 1990-05-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH048524U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004503160A (en) * | 2000-07-07 | 2004-01-29 | テレフオンアクチーボラゲツト エル エム エリクソン | Transmitter with composite amplifier |
-
1990
- 1990-05-09 JP JP4764290U patent/JPH048524U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004503160A (en) * | 2000-07-07 | 2004-01-29 | テレフオンアクチーボラゲツト エル エム エリクソン | Transmitter with composite amplifier |
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