- #1
likephysics
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I am trying to design a 3 Resistor voltage divider. The center resistor is shorted out using a transistor depending on the input voltage.
If Vin is <1, then center resistor is not shorted.
If Vin is >1 then center resistor is shorted by the BJT, so only the top and bottom resistor will act. (ignoring Vce sat).
But when I simulate, the voltage at the emitter increases when the BJT is turned ON.
I don't understand why.
In the attachment, Vin goes to the +Ve terminal of the buffer.
If Vin is <1, then center resistor is not shorted.
If Vin is >1 then center resistor is shorted by the BJT, so only the top and bottom resistor will act. (ignoring Vce sat).
But when I simulate, the voltage at the emitter increases when the BJT is turned ON.
I don't understand why.
In the attachment, Vin goes to the +Ve terminal of the buffer.