What is the purpose of the resistors RD and RS in this MOSFET amplifier? I understand that R1 and R2 act as a voltage divider that Bias the Gate of the transistor. -
![amplifier - Mosfet Voltage Gain in common-source configuration - Electrical Engineering Stack Exchange amplifier - Mosfet Voltage Gain in common-source configuration - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/APSoe.png)
amplifier - Mosfet Voltage Gain in common-source configuration - Electrical Engineering Stack Exchange
Small Signal Analysis of Common Drain (CD) MOSFET Amplifier | Online Small Signal Analysis of Common Drain (CD) MOSFET Amplifier App/Software Converter – CalcTown
![N-Channel metal oxide semiconductor field effect transistor using either Shichman-Hodges equation or surface-potential-based model - MATLAB N-Channel metal oxide semiconductor field effect transistor using either Shichman-Hodges equation or surface-potential-based model - MATLAB](https://www.mathworks.com/help/sps/ref/n_channel_mosfet_iv_curve_2.png)