Pregunta de entrevista de Lutron Electronics
The power supply feeds a microcontroller. The minimum and maximum voltages are given, and the microcontroller is typically in asleep state and occasionally wakes up to send RF signals. The current consumed in both states is given. Are the supply voltage requirements violated?
Respuesta de la entrevista
Anónimo
7 feb 2023
I modelled the microcontroller as a current source, and solved in a similar way to the first problem, finding the currents in then components. The capacitor can be excluded as the transient was not important. By finding the steady state, it was faster to see if the conditions were violated. Then, I substituted into the KCL equation and solved for the voltage.