Patent ID: 6778003
Filing Date: 2004-08-17
Classification: G06F,G11C,H02M

Abstract:
A voltage generation circuit, comprising:a voltage pump adapted to receive a supply voltage, the voltage pump operable to develop an output voltage responsive to a pump activation signal; a threshold adjustment circuit adapted to receive a pump-boost signal and being coupled to the voltage pump and to a reference voltage supply, the threshold adjustment circuit operable develop an activation voltage on a node responsive to the output voltage from the voltage pump, the activation voltage reaching a trigger value when the output voltage has a first magnitude and the pump-boost signal is active, and the activation voltage reaching the trigger value when the output voltage has a second magnitude and the pump-boost signal is inactive; a switching circuit having a first signal terminal adapted to receive a supply voltage and a second signal terminal, and having a control terminal coupled to the node of the threshold adjustment circuit, switching circuit coupling the signal terminals together responsive to the activation voltage on the node; a resistor coupled between the second signal terminal the reference voltage supply; and an inverter having an input coupled to the second signal terminal and having an output, the inverter developing the pump activation signal on the output responsive to a voltage across the resistor to activate the pump activation signal responsive to the activation voltage being less than the trigger value and operable to deactivate the pump activation signal responsive to the activation voltage being greater than the trigger value.