hybrid model using h parameter.... confusion???

[aniket433]

hybrid model using h parameter.... confusion

A standard hybrid model ( h- parameter) contains only "hoe" in ce amplifier..
why some books uses "1/hoe" in equivalent circuit diagram...:|:|

 

[LvW]

Sometimes an equivalent circuit diagram contains current sources rather than voltage sources. In these cases it is logical to use a conductance (in parallel to the source) instead of a resistor (in series with the source) to model a real and non-ideal source.

 

[umeaz]

Re: hybrid model using h parameter.... confusion

hoe is the transconductance of the amplifier.Thus,in equivalent circuit diagrams,resistance is denoted as 1/hoe

 

[LvW]

Re: hybrid model using h parameter.... confusion

hoe is the transconductance of the amplifier.Thus,in equivalent circuit diagrams,resistance is denoted as 1/hoe

No, the hybrid model contains no transconductance (h-parameter: Input resistance, current gain, output conductance, backward voltage).

 

[aniket433]

Re: hybrid model using h parameter.... confusion

but 1/hoe doesn't help to deriving the equations ( Ai, Av, Ri , Ro etc)... even 1/hoe doesn't fits in eqn.'' hfe.Ib + hoe.Vce "..
then.. is it a just notification for equivalent circuit diagram ? ( as resistance )...

 

[LvW]

I don`t understand the problem. If you have 1/hoe you also have hoe. Or missed I something?