Please show described step by step solution Thanks Use the T

Please show described step by step solution. Thanks

Use the Thevenin Resistance Method to find the upper -3dB frequency f_H of the following small-signal common-source amplifier circuit. Assume g_m = 1.26 mA/V r_o = 100 k Ohm R_S = 10 k Ohm R_G = 500 kOhm R_D = R_L = 10 k Ohm C_gd = C_gs = C_ds = 1 fF (femtofarad)

Solution

cutoff frequency = 1/RC

R = RG + (RD//RL)

= 550K

C = Cgs + Cgd + Cds= 10-¹⁶

^w = 200 MHZ