(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2001/0017563 Al
Kim (43) Pub. Date: Aug. 30,2001
A pulse generator, which only occupies a small area in a circuit chip by using a characteristic that the potential in both ends of a capacitor is maintained. The pulse generator comprises a voltage level control unit for controlling a voltage level of a first node according to the state of input signal; a first switching unit for controlling a voltage level of a second node by performing a switching operation according to the state of the input signal; a second switching unit for changing a voltage level of the second node by performing another switching operation, opposite to the first switching means according to the state of the input signal; a charge/discharge unit for charging/discharging a voltage between the first and the second nodes according to the switching state of the first and the second switching means; and an output unit for outputting a pulse signal according to the charging/discharging state of the charge/discharge means.