Transistor Region Audit Cites Every Source - Electronic Circuits XI: Transistor Switching and Device Regions Step by Step

The capstone audit ties base drive, collector region, inverter output, and fanout. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

The audit cites base drive, load demand, and output region

The base current is 1 A, the drive limit and load demand are both 3 A, and the inverter output is LOW.

I_B=1\ \text{A},\quad \beta I_B=I_\text{load}=3\ \text{A}

The final accepted label also depends on the base-drive budget

The fanout budget uses 2 A against a 3 A limit, so the checked audit is accepted.

2\ \text{A}\le 3\ \text{A}\Rightarrow \text{accepted}