Determine the values of r_p , , and g_m for a triode operating at a plate voltage of 200 V and a grid voltage of -6 V . The plate characteristics are depicted in the figure.

Step-by-step solution

From the given plate characteristics, we identify the operating point at V_p = 200 V and V_g = -6 V . At this point, the plate current is I_p = 3 mA . To find the plate resistance r_p , we use the formula r_p = ( V_p I_p )_ V_g = constant . Keeping V_g = -6 V constant, we select two points on this curve from the dashed box: (V_p = 200 V , I_p = 3 mA ) and (V_p = 240 V , I_p = 8 mA ) . r_p = 240 - 200 (8 - 3) 10⁻³ = 40 5 10⁻³ = 8000 = 8.0 k . To find the mutual conductance g_m , we use the formula g_m = ( I_p V_g )_