Power supply sequencing apparatus

A power supply sequencing apparatus to simultaneously control the application or removal of supply voltages of opposite polarity to an electronic device comprising in combination:

• a first and second voltage supply means, said first and second voltage supply means being of opposite polarity, and,
• a first amplifier and a second amplifier, said first amplifier including a first main conduction path and a first control electrode, said first control electrode controlling the current flowing through said first main conduction path, said second amplifier including a second main conduction path and a second control electrode, said second control electrode controlling the current flowing through said second main conduction path, the current flowing through said first and second main conduction paths being controlled in the same direction by signals of opposite polarities applied to said first and second control electrodes, said first control electrode is directly connected to said second voltage supply means, said second control electrode is directly connected to said first voltage supply means, said first main conduction path being connected from said first voltage supply means to said electronic device, said second main conduction path being connected from said electronic device to said second voltage supply means.