Consider the BJT voltage follower below. Suppose tahtits input consists of a dc source value VDC=5V in series with a1kHz, 4.0 V p-p sinusoidal signal Vs and a resistorRs=10kOhm.
a) What is the lowest value of Vcc for which the BJT willalways remain in the active region? Sketch Vl versus time for a Vcc slightly lower than this limit. Which BJT region(saturationor cuttoff) limits the output voltage swing?
b)For the case VCC=15V, what value of VDC will allow themaximum possible value of Vs if the BJT is to remain in its active region?