When designing a common drain amplifier of the circuit linked below, I need to attach a coupling capacitor to the Vout of the circuit. I think a capacitor connected to Vout should be just below RD, is this correct? I've attached an incomplete version with Vin and its coupling capacitor below, Thanks for any help.
When designing a common drain amplifier of the circuit linked below, i need to attach a coupling capacitor to the Vout of the circuit. I think a capacitor connected to Vout should be just below RD, is this correct? I've attached an incomplete version with Vin and its coupling capacitor below, Thanks for any help.
If the coupling capacitor is connected to the drain, then the circuit is a common source amplifier.
If the coupling capacitor is connected to the source, then the circuit is a common drain amplifier.
Both are amplifiers, but with different characteristics. The common source amplifier will give greater voltage gain. The common drain amplifier will give little to no voltage gain, but will give great current gain, and low output impedance.
Choose the amplifier topology that fits your requirements.
