Patent ID: 6683336
Filing Date: 2004-01-27
Classification: H01L

Abstract:
A semiconductor integrated circuit comprising:a plurality of modules comprising a plurality of cells including first cells operating under a plurality of voltages, and the plurality of cells in the plurality of modules are arranged in a plurality of cell rows or cell columns; a first wiring formed on each cell row and each cell column for supplying first supply voltage in the plurality of voltages, and first supply voltage is supplied to each of the first cells in the plurality of cells through the first wiring; and a second wiring for supplying second voltage in the plurality of voltages to each of the first cells through a net for power source supply; wherein each of the first cells to which the plurality of supply voltages are supplied is a level converter; wherein the level converter comprises: a first N well to which first voltage in the plurality of voltages is supplied through the wiring of the power source; a second N well to which second voltage in the plurality of voltages is supplied through the net for the power source supply; a first P channel type MOS transistor formed on the first N Well and whose source is connected to the wiring; a second P channel type MOS transistor formed on the first N well, whose source is connected to the wiring of the power source, whose gate is connected to a drain of the first P channel type MOS transistor, and whose drain is connected to a gate of the P channel type MOS transistor; a third P channel type MOS transistor formed on the second N well and whose source is connected to a net for the power supply; a first N channel type MOS transistor whose drain is connected to the drain of the first P channel type MOS transistor, whose gate is connected to the drain of the third P channel MOS transistor, and whose source is connected to a ground wiring; a second N channel type MOS transistor whose drain is connected to the drain of the second P channel type MOS transistor, whose gate is connected to the gate of the P channel type MOS transistor, and whose source is connected to the ground wiring; and a third N channel type MOS transistor whose drain is connected to the drain of the third P channel type MOS transistor, whose gate is connected to the third P channel type MOS transistor, and whose source is connected to the ground wiring.