$4\mathrm{.}6$ Common$-$Source Amplifier

The common$-$source amplifier circuit pictured in Figure $4\mathrm{.}6$ is studied in this problem.

Analysis

Determine the midband AC small$-$signal model of the circuit. Note that the portion of the bias network that controls $I_{DQ}$ is the same as the circuit for Problem $4\mathrm{.}5$ on page $150$; use the results of that problem to determine the transconductance gain $g_m.$

Calculate the open$-$circuit voltage gain $A_{vo}$ with $R_L$ unconnected.

Calculate the voltage gain $A_v$ with $R_L$ connected.

$4\mathrm{.}6.$ COMMON$-$SOURCE AMPLIFIER

Use the following circuit components:

$\backslash$table$[[$Component$,$Value$],[V_{DD},9$ V$],[$MOSFET$,V_t=1\mathrm{.}8V$ and $K=50m\frac{A}{V^2}$;$=0$