A common collector, also known as an emitter follower, is a basic transistor amplifier configuration where the collector terminal is common to both the input and output. In this setup, the input signal is applied between the base and the emitter, while the output is taken from the emitter. This configuration provides high input impedance and low output impedance, making it useful for impedance matching and signal buffering. Additionally, it offers voltage gain close to unity, meaning the output voltage closely follows the input voltage.
what is common collector
The picture quality is not that great but here is a drawing of a self biased common collector BJT http://imageshack.us/photo/my-images/200/selfbiasedcommoncollect.png/
emitter follwer
current gain
The percentage of doping in emitter is higher than collector region.hence large current is flow to emitter than collector.
what is common collector
Common collector amplifier can be used as a voltage buffer and in impedance matching
A circuit in which the input signal is applied to its base and the collector is earthed (grounded) is known as common collector configuration of BJT (BiPolar Junction Transistor)
Common-emitter gives more voltage gain because a common-collector amplifier has a voltage gain of 1. But a common-collector can have a power gain because the input impedance is much more than the output impedance.
from the name itself the common collector has its collector terminal in common with both the input and output circuits of a transistor and the base current is chosen as the input current and the output current is the emitter current
unity
Yes, "collector" is a common noun. It refers to a person who gathers or accumulates items, such as stamps, coins, or art. Unlike proper nouns, which name specific individuals or entities, common nouns like "collector" can refer to anyone who fulfills that role.
The picture quality is not that great but here is a drawing of a self biased common collector BJT http://imageshack.us/photo/my-images/200/selfbiasedcommoncollect.png/
emitter follwer
220 ohm's
current gain
No voltage gain