JPH024320U - - Google Patents
Info
- Publication number
- JPH024320U JPH024320U JP8122588U JP8122588U JPH024320U JP H024320 U JPH024320 U JP H024320U JP 8122588 U JP8122588 U JP 8122588U JP 8122588 U JP8122588 U JP 8122588U JP H024320 U JPH024320 U JP H024320U
- Authority
- JP
- Japan
- Prior art keywords
- switch circuit
- transistor
- constant current
- circuit according
- current source
- 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.)
- Granted
Links
- 238000009825 accumulation Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 claims 2
- 230000001737 promoting effect Effects 0.000 claims 2
- 230000002265 prevention Effects 0.000 claims 1
- 229920006395 saturated elastomer Polymers 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Manipulation Of Pulses (AREA)
- Electronic Switches (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来の差動型スイツチ回路を示す回路図、第
３図ａ，ｂは第２図の説明に供する為の特性図、
及び第４図ａ，ｂは第１図の説明に供する為の特
性図である。
３……第１ＰＮＰトランジスタ、４……第２Ｐ
ＮＰトランジスタ、９……コンパレータ、１１…
…基準電圧源、１２……トランジスタ、２０……
定電流源。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram showing a conventional differential type switch circuit, Figures 3a and b are characteristic diagrams for explaining Figure 2,
4a and 4b are characteristic diagrams for explaining FIG. 1. 3...First PNP transistor, 4...Second P
NP transistor, 9... Comparator, 11...
...Reference voltage source, 12...Transistor, 20...
Constant current source.
Claims (1)
ＮＰトランジスタと、該第１及び第２ＰＮＰトラ
ンジスタの共通エミツタに接続された定電流源と
、前記第１及び第２ＰＮＰトランジスタのコレク
タからの２つの出力信号を比較するコンパレータ
とから成る差動型スイツチ回路において、前記第
１及び第２ＰＮＰトランジスタの共通エミツタに
おける電荷蓄積効果を助長させる手段を設けたこ
とをを特徴とする差動型スイツチ回路。 (2) 電荷蓄積効果を助長させる手段は、コレク
タが定電流源に、エミツタが前記第１及び第２Ｐ
ＮＰトランジスタの共通エミツタに接続されるト
ランジスタと、該トランジスタが飽和状態で動作
するようなバイアスを印加するバイアス源とから
成ることを特徴とする請求項第１項記載の差動型
スイツチ回路。 (3) 前記トランジスタのベースと前記バイアス
源との間に過電流防止用の抵抗を挿入したことを
特徴とする請求項第２項記載の差動型スイツチ回
路。[Scope of claims for utility model registration] (1) First and second P where emitters are commonly connected
A differential switch circuit comprising an NP transistor, a constant current source connected to a common emitter of the first and second PNP transistors, and a comparator that compares two output signals from the collectors of the first and second PNP transistors. 2. A differential type switch circuit according to claim 1, further comprising means for promoting a charge accumulation effect in a common emitter of the first and second PNP transistors. (2) The means for promoting the charge accumulation effect is such that the collector is a constant current source and the emitter is a constant current source.
2. A differential switch circuit according to claim 1, comprising a transistor connected to a common emitter of the NP transistors and a bias source for applying a bias such that the transistor operates in a saturated state. (3) The differential type switch circuit according to claim 2, wherein a resistor for overcurrent prevention is inserted between the base of the transistor and the bias source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8122588U JPH051159Y2 (en) | 1988-06-20 | 1988-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8122588U JPH051159Y2 (en) | 1988-06-20 | 1988-06-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH024320U true JPH024320U (en) | 1990-01-11 |
| JPH051159Y2 JPH051159Y2 (en) | 1993-01-13 |
Family
ID=31306015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8122588U Expired - Lifetime JPH051159Y2 (en) | 1988-06-20 | 1988-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH051159Y2 (en) |
-
1988
- 1988-06-20 JP JP8122588U patent/JPH051159Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH051159Y2 (en) | 1993-01-13 |