BJT NPN pull-down Resistor

WBahn

Joined Mar 31, 2012
30,062
The calculated 4.5V is actually 4.545V. One writer assumed Vbe=0.6V and you assumed 0.7V. Not theory, just quick, sloppy calculations.
And note that the difference between 4.5V and 4.545V is 1%, which is almost always less than the uncertainty with which we know any of the quantities we are working with. Thus, for all practical purposes, the two results are equivalent.
 
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