Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Can you explain how this capacitor is used to keep RF voltages off the supply voltage (Vcc)?1) Cb is part of the power supply. It is to keep RF voltages off the supply voltage (Vcc). At RF it should be a 'short'. It is a large cap that will have near 0 ohms at RF.
I think I know these notions but I don't know how the transistor is in saturation mode in this case.2) The Vc-e is small. The transistor is not linear. Linear= increase base current and collector voltage changes about the same amount. Saturation= base current change causes a very small change in Vc-e.
It seems strange to me. Is this ONLY a very special case of RF signal?3) Fig a. On the base is a square wave signal source. That is the source of RF.