Patent ID: 7084675
Filing Date: 2006-08-01
Classification: G11C

Abstract:
1. A boosted voltage generating circuit comprising: a sensing signal generating circuit which generates a sensing signal; a pulse generating circuit which generates a driving signal in response to the sensing signal; and a pumping circuit which generates a boosted voltage in response to the driving signal to control a word line of a semiconductor device; wherein the sensing signal generating circuit comprises: a comparator having a first input terminal, a second input terminal for receiving a reference voltage, and an output terminal for outputting the sensing signal; a resistor coupled between the boosted voltage and the first input terminal of the comparator; and a constant current source coupled between the first input terminal of the comparator and a ground voltage, wherein when a voltage at the first input terminal of the comparator is higher than a bias voltage the sensing signal goes to a first logic state and the boosted voltage is maintained and when the voltage of the first input terminal of the comparator is lower than the bias voltage the sensing signal goes to a second logic state and the boosted voltage is increased.