Circuit pre-charging

A circuit, comprising:

• a first transistor having a control terminal and first and second terminals;
• a first diode having an anode and a cathode, the anode of the first diode coupled to the second terminal of the first transistor;
• a second diode having an anode and a cathode, the anode of the second diode coupled to the cathode of the first diode;
• a second transistor having a control terminal and first and second terminals, the first terminal of the second transistor coupled to the cathode of the second diode;
• a third diode having an anode and a cathode, the anode of the third diode coupled to the second terminal of the first transistor;
• a first switch having first and second terminals, the first terminal of the first switch coupled to the cathode of the third diode;
• a fourth diode having an anode and a cathode, the cathode of the fourth diode coupled to the first terminal of the second transistor;
• a second switch having first and second terminals, the first terminal of the second switch coupled to the anode of the fourth diode;
• a third switch having first and second terminals, the first terminal of the third switch coupled to the second terminal of the first transistor;
• a fourth switch having first and second terminals, the first terminal of the fourth switch coupled to the second terminal of the third switch, and the second terminal of the fourth switch coupled to a ground terminal;
• a fifth switch having first and second terminals, the first terminal of the fifth switch coupled to the first terminal of the second transistor;
• and
• a sixth switch having first and second terminals, the first terminal of the sixth switch coupled to the second terminal of the fifth switch, and the second terminal of the sixth switch coupled to the ground terminal,
• wherein the circuit is configured to receive control signals and, in response to the control signals:
• in a first operational state, open the first through sixth switches responsive to the first or second transistors being conductive;
• in a second operational state, close the third through sixth switches and open the first and second switches, while the first and second transistors are non-conductive;
• and
• in a third operational state, close first and second switches and open the third through sixth switches, while the first and second transistors are non-conductive.