* Capacitor and coils are resistors in AC.
*Capacitor +_ indicate charging/discharging Time.
* Capacitor charge time: as R&C value increase the charge and discharge values increase simultaneously, thus the +/- mark slows down.
* Current direction is conventional. it goes in the capacitor while charging and leaves it while discharging.
* Notice the load #R1 is AC
* The coil makes the load sinusoidal
* The square source can be replaced by a battery and a MOSFET
$\omega_0=2\pi f_0$
$$ A=B+R1$$
