ELECTROSTATIC DISCHARGE PROTECTING CIRCUIT USING BOOTSTRAP

摘要

PURPOSE: An ESD(electrostatic discharge) protecting circuit using bootstrap is provided for sensitive reaction to the ESD using the bootstrap, thereby protecting internal circuits. CONSTITUTION: A capacitor(C1) is connected to a source voltage(Vcc). A capacitor(C2) is connected between the capacitor(C1) and a ground voltage(Vss). In an NMOS transistor(Q1), a drain is connected to the source voltage(Vcc), gate and source are connected to a junction between the capacitors(C1,C2). In an NMOS transistor(Q2), a drain is connected to the source voltage(Vcc), a source is connected to the ground voltage(Vss), and a gate is connected to the source of the NMOS transistor(Q1). In a PN-diode(D1), a cathode is connected to the source voltage(Vcc) and an anode is connected to the ground voltage(Vss).