Patent ID: 7167030

Claim:
A drive circuit for supplying electric power to an electric load from a DC electric source via a power line, said drive circuit comprising: a pair of series-connected first and second MOSFETS of the same conduction type, said first MOSFET having a drain connected to the electric load and said second MOSFET having a source connected to the DC electric source; a pair of clamp circuits respectively connected between drains and gates of the first and second MOSFETS; a series circuit of a first resistor and a switch, said series circuit being connected between the gate and the source of said first MOSFET; a first test terminal; a second test terminal connected to a joint of said first and second MOSFETS; a third test terminal for operating said switch; a fourth test terminal connected to a joint of said first resistor and said switch; and a second resistor connected between the gate of the second MOSFET and the first test terminal.