JPS61121016U - - Google Patents
Info
- Publication number
- JPS61121016U JPS61121016U JP376285U JP376285U JPS61121016U JP S61121016 U JPS61121016 U JP S61121016U JP 376285 U JP376285 U JP 376285U JP 376285 U JP376285 U JP 376285U JP S61121016 U JPS61121016 U JP S61121016U
- Authority
- JP
- Japan
- Prior art keywords
- level
- transistor
- shift circuit
- input signal
- resistor
- 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 4
Description
第１図は本考案の実施例の回路図、第２図は第
１図の制御電圧発生回路の具体例を示す回路図、
第３図は従来のレベルシフトの回路図、第４図は
従来のレベルシフト回路の入出力特性図である。
主要部分の符号の説明、１……レベルシフト回
路、２……制御電圧発生回路、Ｄ１，Ｄ２……レ
ベルシフトダイオード、Ｑ２……可変インピーダ
ンストランジスタ。
FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific example of the control voltage generation circuit of FIG. 1,
FIG. 3 is a circuit diagram of a conventional level shift circuit, and FIG. 4 is an input/output characteristic diagram of the conventional level shift circuit. Explanation of symbols of main parts: 1...Level shift circuit, 2...Control voltage generation circuit, D1, D2...Level shift diode, Q2...Variable impedance transistor.
Claims (1)
ジスタのエミツタ出力をレベルシフトするレベル
シフト用ダイオードとが電源とアースとの間に直
列接続され、前記トランジスタのベースへ入力抵
抗を介して入力信号が印加されたレベルシフト回
路であつて、前記抵抗を流れる電流を分流すべく
設けられた可変インピーダンス手段と、前記入力
信号のレベルに応じて前記可変インピーダンス手
段のインピーダンスを制御する制御手段とを有す
ることを特徴とするレベルシフト回路。 An emitter follower transistor and a level shifting diode for level shifting the emitter output of this transistor are connected in series between a power supply and ground, and an input signal is applied to the base of the transistor via an input resistor. The shift circuit is characterized by having variable impedance means provided to shunt the current flowing through the resistor, and control means for controlling the impedance of the variable impedance means according to the level of the input signal. level shift circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP376285U JPS61121016U (en) | 1985-01-16 | 1985-01-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP376285U JPS61121016U (en) | 1985-01-16 | 1985-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61121016U true JPS61121016U (en) | 1986-07-30 |
Family
ID=30478695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP376285U Pending JPS61121016U (en) | 1985-01-16 | 1985-01-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61121016U (en) |
-
1985
- 1985-01-16 JP JP376285U patent/JPS61121016U/ja active Pending