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

Compute the transfer function from the input, In this project we will consi... In this project we will consider the control of a synchronous generator supplying electricity to the grid. We will focus on the problem of frequency stability. The frequency at whi

Digital modulation using matlab, hi I want the code of digital modulation i... hi I want the code of digital modulation in matlab with inputs binary bit stream and M-ar

What are loosely coupled systems, What are loosely coupled systems? In ... What are loosely coupled systems? In loosely coupled systems every CPU may have its own bus control logic. The bus arbitration is handled by an external circuit, common to all

The classical free electron theory, The free electron theory of metals was ... The free electron theory of metals was first proposed by Drude and later improved by Lorentz. The main postulates of this theory are 1.       All metal contain, adequate number

Basic specifications of a ujt, The very basic specifications of a UJT are: ... The very basic specifications of a UJT are: Vbb(max) - The maximum interbase voltage that can be applied to the UJT (b) Rbb-the interbase resistance of the UJT (c) n - The

\, Refer to Figure 100. Assume MKS units. Given: R1= 4, R2=14, R3= 9, I4... Refer to Figure 100. Assume MKS units. Given: R1= 4, R2=14, R3= 9, I4= 8, I5= 7. Determine: Ieq, Req, and V3.

Calculate the v number and the number of guided modes, A multimode step ind... A multimode step index fibre along with a core diameter of 80µm and a associative refractive index difference of 1.5% is operating at a wavelength of 0.85µm. If the core refractive

Define electric current, Define Electric current If an electric pressur... Define Electric current If an electric pressure or voltage is applied across any material there is a tendency for electrons to move in a certain direction. This movement of fre

Energy stored in a magnetic field , Energy stored in a magnetic field ... Energy stored in a magnetic field Consider a circuit consisting of a voltage supply,  switch,  resistor  and  a  coil  of  N turns wound on a toroid of length l, all in series

Short circuit, what is the time of short circuit ? what is the time of short circuit ?