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What is the formula of current gain in common-collector configuration?
Since the common collector current gain is defined as the ratio of the emitter current to the base current, γ = IE/IB = β + 1, it therefore follows that the amplifiers current gain must be approximately equal to Beta (β) as β + 1 is virtually the same as Beta.
What is current gain equation for CB amplifier?
The current gain for a CB configuration is called Alpha, ( α ). In a BJT amplifier the emitter current is always greater than the collector current as IE = IB + IC, the current gain (α) of the amplifier must therefore be less than one (unity) as IC is always less than IE by the value of IB.
How does the load of a common collector amplifier work?
In the common-collector configuration, though, the load is situated in series with the emitter, and thus its current is equal to the emitter current. With the emitter carrying collector current and base current, the load in this type of amplifier has all the current of the collector running through it plus the input current of the base.
What is the current gain of a common emitter amplifier?
The common-emitter amplifier configuration examined in the previous section had a current gain equal to the β of the transistor, is that the input current went through the base and the output (load) current went through the collector, and β by definition is the ratio between the collector and base currents.
How to calculate the emitter current, i e?
How to Calculate the Emitter Current, I e, of a Transistor. The emitter current, I e, of a transistor is the amplified output current of a bipolar junction transistor. There are several ways to find the emitter current, I e, of a transistor. And it all depends on what information is already known about the transistor:
How is a common collector used in a voltage regulator?
One popular way to increase the current-handling ability of a regulator circuit like this is to use a common-collector transistor to amplify current to the load so that the Zener diode circuit only has to handle the amount of current necessary to drive the base of the transistor. Common collector application: voltage regulator.