2 port parameters of DC coupled BJT's ?

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DarthVolta

Joined Jan 27, 2015
509
https://www.electroschematics.com/2-transistor-radio-receiver/
I'm trying to calculate the DC o.p. of a simple 2 BJT AM reciever. And so far I haven't gotten a valid solution from mesh/KVL/node/KCL, methods after 2-3 trys, despite looking right to me.

So far I've done the basic's of Z-Y-H parameters, but that was with AC, and when using a simple base-emitter model, Vbe is dropped from the AC circuit. I tried making a DC version of the Z-matrix, but right away Vbe is left in the DC eqn, and replacing it with the diode eqn looks worse and is probably not how it's done.

two-transistor-radio.gif



Searching the webs for how to calculate multi-transistor DC biasing seems to get me nowhere, and ton's of useless posts (like mine) and on only single BJT's, or only AC
 
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