 At the same time, the other empty capacitor quickly charges thus restoring its charge (the first capacitor acts as a time-setting capacitor and the second prepares to play this role in the next state).The circuit operation is based on the fact that the forward-biased base-emitter junction of the switched-on bipolar transistor can provide a path for the capacitor restoration.State 1 (Q1 is switched on, Q2 is switched off)

In the beginning, the capacitor C1 is fully charged (in the previous State 2) to the power supply voltage "V" with the polarity shown in Figure 1.