Q. What are the Current relations in common emitter configuration?

In a CB configuration Ie is the input current and Ic is the output current. These currents are relayed through the equations given below

I_e=I_c+I_b

I_c=II_e+I_cb0

In CE configuration, Ib becomes the input current and the Ic is the output current. We are interested in knowing how the output Ic is related with the input current Ib. That is, we should find a relation such as

I_c = f(I_b)

To obtain the relation, we simply substitute the expression  of  Ie  from the equations given earlier,so that

I_c = ID_c(I_c+I_b) + I_cbo

or

(1-I_dc)I_c=I_dcI_b+I_cbo

or

I_c = (I_dc/(1-I_dc))I_b+(1/(1-Id_c))I_cbo

In thjis equation,Ic is given in terms of Ib. The equations can be simplified somewhat by defining

? I_dc/(1-I_dc)

and

I_ceo=I_cbo/(1-I_dc)

thus equation becomes

Ic=?_dcIb+I_ceo

Posted Date: 6/11/2013 2:52:59 AM | Location : United States

Ask an Expert

Related Discussions:- Current relations in common emitter configuration, Assignment Help, Ask Question on Current relations in common emitter configuration, Get Answer, Expert's Help, Current relations in common emitter configuration Discussions

Write discussion on Current relations in common emitter configuration
Your posts are moderated

Write your message here..

Related Questions

Emi, what is strain gage what is strain gage

Operating system, what is serveces of operating system? what is serveces of operating system?

Can you explain binary number systems, Q. Can you explain Binary Number Sys... Q. Can you explain Binary Number Systems? The Binary numbers are used to represent digital information because like most digital systems, binary numbers have only two possible

Simulate the circuit using digital simulation techniques, You are the new c... You are the new chief PCB designer for a small company who are about to become heavily involved in the design and realisation of digital timing products. Your management wants to p

Name the materials used in case of bimetals, Name the materials used in cas... Name the materials used in case of Bimetals and give reasons. Bimetals : Alloy of nickel and iron along with low value of coefficient of thermal expansion are utilized as

Cipper, when i/p voltg is grater than battery diode is clse or open when i/p voltg is grater than battery diode is clse or open

Superposition theroem, what are the limitations of superposition theroem what are the limitations of superposition theroem

What the voltage gains in the fet amplifier, Q. What the voltage gains in t... Q. What the voltage gains in the FET amplifier? For common source  Voltage gain=V o /V i = - µRd / Rd + rd where µ is the amplification factor,Rd the drain resistance a

#boiler troubles, Ask question #Minimum 300 words accepted# Ask question #Minimum 300 words accepted#

What does the eu do, Execution Unit receives program instruction codes and ... Execution Unit receives program instruction codes and data from BIU, implements these instructions and store the result in general registers.