VLSI homework 1, and IoT reading assignment 1 done

7th-Semester-Fall-2024/VLSI/homework/homework-1/problem_1.py

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+import numpy as np
+import matplotlib.pyplot as plt
+
+e_0 = 8.85E-14
+k_ox = 3.9
+e_ox = e_0 * k_ox
+
+mu = 350                # 350 cm^2 / (V*s)
+t_ox = 100E-8           # 100A
+
+C_ox = e_ox / t_ox
+W = 1.2
+L = 0.6
+
+beta = mu * C_ox * W/L
+
+V_g_range = np.arange(6)
+V_t = 0.7
+V_dd = np.linspace(0, 5, 50)
+
+def I_ds(V_gs, V_ds, V_t, beta):
+    if V_gs < V_t:
+        return np.zeros_like(V_ds)
+
+    V_dsat = V_gs - V_t
+
+    return np.where(V_ds < V_dsat,
+                    beta * (V_gs - V_t - V_ds/2) * V_ds, 
+                    beta * (V_gs - V_t)**2 / 2)
+
+for V_s in (0, 2):
+    for V_g in V_g_range:
+        V_gs = V_g - V_s
+        V_ds = V_dd - V_s
+        plt.plot(V_ds,
+                 1000*I_ds(V_gs, V_ds, V_t, beta),
+                 label="$V_{gs}$ = "+str(V_gs))
+
+    plt.xlabel("$V_{ds}$[V]")
+    plt.ylabel("$I_{ds}$[mA]")
+    plt.legend()
+    plt.show()