Patent ID: 7760558

Claim:
A method for boosting a supply voltage of memory cells, comprising: employing a first boosting stage and a second boosting stage that are coupled in series to one another, the first boosting stage includes a first boosting capacitor and the second boosting stage includes a second boosting capacitor; controlling at least one of the first boosting stage or the second boosting stage in a voltage booster circuit by comparing a level of the supply voltage; the controlling includes at least one of the following: an increase of the number of boosting stages when the level of the supply voltage is below a threshold value; or a decrease of the number of boosting stages when the level of the supply voltage is above a threshold value; detecting a boost to the supply voltage by at least one of the first boosting capacitor or the second boosting capacitor; and utilizing an isolator to electrically isolate the first boosting capacitor and the second boosting capacitor from each other based upon the detected boost to the supply voltage by at least one of the first boosting capacitor or the second boosting capacitor, wherein the isolator is connected in series between the first boosting stage and the second boosting stage.