Patent ID: 7952937

Claim:
A wordline driver for a non-volatile memory device, the wordline driver comprising: a wordline driver output; a first power source, adapted to provide an erase level voltage for erasing portions of the non-volatile memory device; a second power source, adapted to provide read and program level voltages for reading and programming portions of the non-volatile memory device; first switching means adapted to connect the wordline driver output to a one of the first and second power sources dependent upon an operating mode of the wordline driver, the first switching means including an isolation transistor adapted to selectively connect the second power source and the wordline driver output; and a programmable switch controller for providing a variable control signal to a control electrode of the isolation transistor, the programmable switch controller being arranged to set the variable control signal to a value dependent upon at least one operating parameter of the non-volatile memory device, and wherein the programmable switch controller further comprises: a voltage reference having an output; and a control loop connected between the output of the voltage reference and the control electrode of the isolation transistor and configured to adapt the output of the voltage reference to provide the variable control signal to the control electrode of the isolation transistor.