bipolar cmos
Why CMOS offers better advantages over BJT (bipolar junction transistor) as a switch?
What are the factors?
This is because of how the CMOS and BJT work. If you use an N-channel BJT as a switch, if applicable, the base current which means it is "on" and when that happens I have a voltage drop of 0.7 V (approx.) between base transmitter nodes, Take That 0.7V and multiplied times the base current and transistor gains the power consumed when "on". Unlike CMOS BJT transistor drive current between the gate (base) and drain (emitter), as they are cut off by a dielectric (like a capacitor), thus not consuming any power at steady state (either on or off). So there is no response, a BJT consumes energy, while "on" and does not CMOS, CMOS consumes only at the instant the switch from on to off and vice versa, thereby consuming more energy high frequency (HF) applications. But regardless of this, the CMOS is more common in high frequency integrated circuits and CMOS transistors that can fit more in a given area rather than using BJT.
BiPolarやCMOS回路の基礎の勉強会_第一回_2
