There is a data sheet value you can look up.
As a trade off, we want to stay above Vce(sat) so the output does not get distorted.
ex: 2N2222 Vce(sat) ≈.3V
For many small signal BJTs the saturation voltage can be ≈.5V, 1.5V is above this.
There is a data sheet value you can look up.
As a trade off, we want to stay above Vce(sat) so the output does not get distorted.
ex: 2N2222 Vce(sat) ≈.3V
For many small signal BJTs the saturation voltage can be ≈.5V, 1.5V is above this.