The circuit shown in the figure is used to charge the capacitor C alternately from two current sources as indicated. The Switches and are mechanically coupled and connected as follows:
For ,
(n = 0, 1, 2,…) to and to
For ,
(n = 0, 1, 2,…) to and to .
Assume that the capacitor has zero initial charge. Given that u(t) is a unit step function, the voltage across the capacitor is given by
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