CHARGE PUMP CIRCUIT AND NONVOLATILE SEMICONDUCTOR MEMORY HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a charge pump circuit capable of generating a positive and negative potentials. SOLUTION: Resetting circuits 52, 70 give fixed potentials to output nodes Noutn, Noutp which output a negative and positive potentials VN, VPS, respectively, when it is not being used. When a negative potential is generated, switches SW2, SW3 are turned on. When a positive potential is generated, switches SW1, SW4 are turned on. Reference potentials of generated potentials are given to inner nodes N10, N20 via the switches SW1, SW3, respectively. A voltage generator 53 uses polydiode elements and hence a charge pump circuit capable of generating a positive and negative voltages can be realized, without greatly changing the manufacturing method.