- Joined Jun 22, 2012
That's a little tighter math than the PM I did with The Dodger because I neglected the Ib term in the collector current...because it is less than 1% of Ic. Another habit from designing 1% meters. I neglect things that are less than 1/2% until I'm doing the error budget calculations. In this circuit, the errors are a lot more about diminished Hfe at low Vc than it is about the base current being part of the collector resistor current.Have a look at the section "Collector Feedback Biasing a Transistor
Do you mean Gx=R2/R3??Hi,
To make this really short, if you calculate the initial gain as Gx=R3/R2 (which is really what we did above) then that's the very rough estimate, and the correction is then:
where G is the actual gain and B is the transistor Beta.
In the limit as B gets very high which is the initial rough assumption, G=Gx.
Do you mean Gx=R2/R3??
This would be 100K /10K =10...
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by Gary Elinoff