Partial derivatives - transistor hybrid model, Electrical Engineering

Partial derivatives - Transistor hybrid model:

The partial derivatives are taken by keeping the collector voltage or base current constant as pointed out by the subscript attached to the derivative.

ΔvB , ΔvC ,  Δ iC , Δ iB present the small signal(increment) base and collector voltages and currents, they are presented by symbols   vb , vc , ib and  ic correspondingly. 

 Eqs (3) and (4) may be written like as follow:

             Vb = hie ib + hre Vc                                                                 

              ic = hfe ib + hoe Vc

in which   hie =(∂f1/∂iB)Vc =  (∂vB/∂iB)Vc = (ΔvB /ΔiB)Vc = (vb / ib)Vc         

                  hre =(∂f1/∂vc)IB   =  (∂vB/∂vc) IB = (ΔvB /Δvc) IB = (vb /vc) IB


                hfe  =(∂f2/∂iB)Vc =  (∂ic /∂iB)Vc = (Δ ic /ΔiB)Vc = (ic / ib)Vc

                hoe= (∂f2/∂vc)IB   =  (∂ic /∂vc) IB = (Δ ic /Δvc) IB = (ic /vc) IB

The above equations described the h-parameters of the transistor in CE configuration. Similar theory can be extended to transistors in additional configurations.

Hybrid Model and Equations for the transistor in three dissimilar configurations are displayed below.

662_Partial derivatives - Transistor hybrid model.png

Posted Date: 1/11/2013 4:45:10 AM | Location : United States

Related Discussions:- Partial derivatives - transistor hybrid model, Assignment Help, Ask Question on Partial derivatives - transistor hybrid model, Get Answer, Expert's Help, Partial derivatives - transistor hybrid model Discussions

Write discussion on Partial derivatives - transistor hybrid model
Your posts are moderated
Related Questions

Clipper Circuits: Clipper circuit have ability to Clipper of portions of the input signals without distorting the remaining part of the alternating wave form. Clamper net

Decision  Making The rhombus diamond symbol  is used to represent  the decision making  process  as shown  below.                                          Figure  De

For the amplifier circuit shown below estimate the mid band voltage gain if the EARLY voltage (V A ) of the current mirror transistors is 80 volts.  Assume the d.c biasing is optim


Q. Frequency-controlled induction-motor drives ? The converters employed for variable-frequency drives can be classified as: • Voltage-source inverter (which is the only one

15 cells with emf for every cell are 1.5V and internal resistance 0.3Ω is linked in parallel. Calculate the value of current flow if the external resistance, 5Ω is linked to them.

This project is about another particular application of a particular embodiment of the patent: A Long Stroke Steam Engine using Solar Generated Steam. The machine elements such as

For sign flag  RP ( Return on Plus ) and RM ( Return on no minus ) Instructions RM returns from the subroutine  to the calling program if sign flag is set  (S=1). The in

Q. Define Resistance in lumped-circuit? An ideal resistor is a circuit element with the property that the current through it is linearly proportional to the potential differenc