With a constant current source, we can charge a capacitor in a linear fashion. We examine a simple constant current source circuit and how it works. We also touch the difference between linear charging and based on the RC-time constant.
RC time constant
Capacitors are little storage devices for electrical charge. They help to provide energy when needed, filter signals, decouple circuits, time in circuits, manipulate control voltage, prevent noise in signals and more. Besides that, they block DC and allow the flow of AC in a circuit.