CMOS ON-CHIP DIRECT-CURRENT NEGATIVE VOLTAGE GENERATION CIRCUIT

摘要

A CMOS on-chip direct-current negative voltage generation circuit, comprising a charging unit (1), a clock unit (2), a charge pump unit (3), an output unit (4) and a charge storage unit (5). The charging unit (1) is used for charging the charge pump unit (3); the clock unit (2) is used for providing needed clock signals to the charge pump unit (3); the charge pump unit (3) is used for generating a negative impulse voltage that is equal to a positive supply voltage in amplitude; the output unit (4) is used for converting the negative impulse voltage generated by the charge pump unit (3) into a direct-current negative voltage, and the direct-current negative voltage is equal to the positive supply voltage; the charge storage unit (5) is used for storing charges brought by the charge pump unit (3) to a negative potential, and meanwhile the direct-current negative voltage output by the output unit (4) is kept stable in the working process of a CMOS chip. The problem that the direct-current negative voltage is generated inside a chip under the condition that the CMOS chip has single direct-current positive power supply is solved.