Chegg Solutions for Microelectronic Circuits (Adel S Sedra, Kenneth C Smith) (Z-Library)_parte_494

Prévia do material em texto

Step 1 of 3 4.029P Write the expression for the current through the diode. Here, is the saturation current of the diode is the thermal voltage is the current through the diode Vis the diode voltage At 20° C , the thermal voltage, Substitute 1 mA for 690 mV for V and 25 mV for mA A Step 2 of 3 Write the formula for diode voltage V. Substitute 1.38x10⁻²³ joules/kelvin for k, 1.6x10⁻¹⁹ coulomb for q, 10⁻³ A for A for and (273-20) K for T. v= 1.6x10⁻¹⁹ =601.7 mV Thus, the diode voltage at C is Step 3 of 3 Determine the diode voltage V at 85° C = Substitute 1.38x10⁻²³ joules/kelvin for k, 1.6x10⁻¹⁹ coulomb for q, 10⁻³ A for A for and (273+85) K for T. = =0.8529 V =852.9 mV Thus, the diode voltage at 85° C is 852.9 mV