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Re: switching BJT from saturation into active mode


 

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V2 is turning the Q1 on very hard, such that it is in saturation, and Vc (product of Ic and R3) is quite large. If you don't want Vc to be so large, you have to reduce the base drive (V2/R1) of Q1 or divert some of that current away from the B-E junction.

What is this supposed to do?

Donald.

On 4/3/25 08:19, john23 via groups.io wrote:

Hello,In the circuit below I have Vc>Vb.
I need some how to make Vb larger then Vc.
I there a method using R1 R2 and R3 which could swith the Vbc junction state?
Given the circuit how can I make the Vcb juntion reversed biased?
Thanks.
Ltspice file is attached.

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