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
Q. What is Idss. What are the conditions for its maximum value? The term 'Idss' refers to saturation condition of the Drain current. From the above graph it's clear that as the

different types of probes used in multimeter

Photovoltaics  is a high-technology approach  to changing sunlight  directly  into  electrical  energy.  The  electricity  is direct  current  and  can  be  used  that  way,  chnag

Power up the "TIMS" unit by using the switch at the back. Connect the Pico Virtual Instrument (PicoScope) to the PC as per Appendix 1 On the "TIMS" unit, connect the 2 kHz (s

Measures of regulator quality: The output voltage can just be held roughly constant; the regulation is fixed by two measurements: 1. Load regulation is the alteration in ou

Ask question #Minwhat is biasing of clamper imum 100 words accepted#

Software Defined Radio (SDR) is an advanced radio technology in which flexibility is achieved in using radio functions such as modulation and demodulation of radio signals are carr

Q. Discuss FDM and illustrate how CCITT stndards help in building the base band? Ans: Frequency Division Multiplexing: It is the process of combining numerous informatio

Four voicemessages, each with 3-kHz bandwidth, are to be sampled at Nyquist rate, and time- multiplexed with samples taken at twice the Nyquist rate from six analog monitoring sign

Explain the term simplex transmission. Data in a simplex channel is always one method. Simplex channels are not frequently used because this is not possible to send back error