File:Ограничение извести с помощью NPN-транзисторов.png
No higher resolution available.
Ограничение_извести_с_помощью_NPN-транзисторов.png (400 × 420 pixels, file size: 7 KB, MIME type: image/png)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: Electronic circuit schematic for a current limiter or current source.
An issue with the circuit here:Current_limiting_using_bjt.gif , is that Q1 will not be saturated unless its base is biased about 0.5 volts above Vcc. This circuit operates more efficiently from a single (Vcc) supply. In this circuit, R1 allows Q1 to turn on and pass voltage and current to the load. When the current through R_sense exceeds the design limit, Q2 begins to turn on, which in turn begins to turn off Q1, thus limiting the load current. The optional component R2 protects Q2 in the event of a short-circuited load. When Vcc is at least a few volts, a MOSFET can be used for Q1 for lower dropout-voltage. Due to its simplicity, this circuit is sometimes used as a current source for high-power LEDs.Русский: Блок_ограничителя_тока |
| Date | 18:40, 8 December 2011 (UTC) |
| Source | Own work (Original text: I (Mikiemike (talk)) created this work entirely by myself.) |
| Author | Mikiemike (talk) |
Licensing
Mikiemike at English Wikipedia, the copyright holder of this work, hereby publishes it under the following licenses:
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Mikiemike at English Wikipedia
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
You may select the license of your choice.
Original upload log
The original description page was here. All following user names refer to en.wikipedia.
- 2011-12-08 18:40 Mikiemike 400×420× (6994 bytes) {{Information |Description = |Source = I (~~~) created this work entirely by myself. |Date = ~~~~~ |Author = ~~~ |other_versions = }}
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:59, 14 July 2018 | | 400 × 420 (7 KB) | Perceptual Bot | User created page with UploadWizard |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on ca.wikipedia.org
- Usage on fa.wikipedia.org
- Usage on ru.wikipedia.org
