Everything about Common Collector totally explained
In
electronics, a
common collector (also known as an
emitter follower or
voltage follower)
amplifier is one of three basic single-stage
bipolar junction transistor (BJT) amplifier topologies, typically used as a
voltage buffer. In this circuit the base terminal of the transistor serves as the input, the emitter the output and the collector is common to both, hence its name. An analogous circuit called the
common drain is constructed using
field effect transistors.
One aspect of buffer action is transformation of impedances. For example, the
Thévenin resistance of a combination of a voltage follower driven by a voltage source with high Thévenin resistance is reduced to only the output resistance of the voltage follower, a small resistance. That resistance reduction makes the combination a more ideal voltage source. Conversely, a voltage follower inserted between a small load resistance and a driving stage presents a large load to the driving stage, an advantage in coupling a voltage signal to a small load.
Applications
The common collector circuit can be shown to have a
voltage gain of almost unity by taking the output voltage and dividing it by the input voltage. Mathematically, gain looks like:
» is the
Thévenin equivalent source resistance.
Further Information
Get more info on 'Common Collector'.
|
External Link Exchanges
Do you know how hard it is to get a link from a large encyclopaedia? Well we're different and will prove it. To get a link from us just add the following HTML to your site on a relevant page:
<a href="http://common_collector.totallyexplained.com">Common collector Totally Explained</a>
Then simply click through this link from your web page. Our crawlers will verify your link, extract the title of your web page and instantly add a link back to it. If you like you can remove the words Totally Explained and embed the link in article text.
As long as your link remains in place, we'll keep our link to you right here. Please play fair - our crawlers are watching. Your site must be closely related to this one's topic. Any kind of spamming, dubious practises or removing the link will result in your link from us being dropped and, potentially, your whole site being banned. |
