 State 2 (Q1 is switched off, Q2 is switched on)

Now, the capacitor C2 is fully charged (in the previous State 1) to the power supply voltage "V" with the polarity shown in Figure 1.Q2 is "on" and connects the right-hand positive plate of C2 to ground.As its left-hand negative plate is connected to Q1 base, a maximum negative voltage (-"V") is applied to Q1 base that keeps Q1 firmly "off".