Bootstrapped driver circuit

A driver circuit comprising;

• a pull up device having a control gate connected between a voltage supply source and an output terminal,
• a first capacitor connected to said terminal,
• a series circuit including a second capacitor and a transistor connected between said output terminal and the control gate of said pull up device, said transistor having an emitter-collector path serially connected with said second capacitor, and
• means for charging said second capacitor.

A bootstrapped bipolar driver circuit comprising;

• a Darlington pair having first and second transistors,
• an input circuit coupled to said first transistor,
• a pull down transistor connected serially with said second transistor between a voltage supply source and a point of reference potential,
• an output terminal connected to the common point between said pull down transistor and said second transistor,
• a first capacitor connected to said output terminal,
• a series circuit coupled between said output terminal and the base of said second transistor, said series circuit including a second capacitor and a PNP transistor, and
• means for charging said second capacitor.

A driver circuit comprising;

• an NPN transistor having a control gate connected between a voltage supply source and an output terminal,
• a first capacitor connected to said terminal,
• a series circuit including a second capacitor and a PNP transistor connected between said output terminal and the control gate of said NPN transistor, said PNP transistor being responsive to the voltage at said output terminal, and
• means for charging said second capacitor.