JPS5516557A - Voltage selective switching circuit - Google Patents
Voltage selective switching circuitInfo
- Publication number
- JPS5516557A JPS5516557A JP8925378A JP8925378A JPS5516557A JP S5516557 A JPS5516557 A JP S5516557A JP 8925378 A JP8925378 A JP 8925378A JP 8925378 A JP8925378 A JP 8925378A JP S5516557 A JPS5516557 A JP S5516557A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- fet
- current
- collector
- transistor
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
Abstract
PURPOSE:To lessen a leaked current when a transistor is OFF, by interposing FET between the collector and base of a bipolar transistor and then by supplying a base current via this FET. CONSTITUTION:As a voltage between collector C and emitter E of transistor 1 rises, a low voltage allow FET 2 to conduct, increasing the collector current. A more rise in voltage increases the gate-source voltage of FET2 and the internal resistance of FET increases while the collector current decreases. When the voltage between G(gate) and S(source) of FET becomes higher the pinch-off voltage, no current flows. This circuit has a little current leakage with the transistor OFF even when resistance R1 is made small to increase the maximum collector current.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8925378A JPS5516557A (en) | 1978-07-21 | 1978-07-21 | Voltage selective switching circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8925378A JPS5516557A (en) | 1978-07-21 | 1978-07-21 | Voltage selective switching circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5516557A true JPS5516557A (en) | 1980-02-05 |
Family
ID=13965587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8925378A Pending JPS5516557A (en) | 1978-07-21 | 1978-07-21 | Voltage selective switching circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5516557A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3030648A1 (en) * | 1980-08-13 | 1982-02-25 | Siemens AG, 1000 Berlin und 8000 München | METHOD AND ARRANGEMENT FOR PRESENTING GRAY VALUES IN A FACSIMILE TRANSMISSION |
-
1978
- 1978-07-21 JP JP8925378A patent/JPS5516557A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3030648A1 (en) * | 1980-08-13 | 1982-02-25 | Siemens AG, 1000 Berlin und 8000 München | METHOD AND ARRANGEMENT FOR PRESENTING GRAY VALUES IN A FACSIMILE TRANSMISSION |
DE3030648C2 (en) * | 1980-08-13 | 1983-11-10 | Siemens AG, 1000 Berlin und 8000 München | Method and arrangement for displaying gray values in a facsimile transmission |
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