Patent attributes
A boost circuit includes: level shifters 3 and 4 for shifting a high level of a clock signal; a first boost means which contains transistors QP3 and QP4 for conducting switching in accordance with the clock signal whose high level has been shifted and capacitors C1 and C2 and, thereby, generates a power source potential VDC2 by conducting a charge pump operation; level shifters 1 and 2 for shifting a high level of a clock signal; inverters IV41 to IV52 for shifting a low level of the clock signal whose high level has been shifted; and a second boost means which contains transistors QP1 and QP2 for conducting the switching in accordance with the clock signal whose high level and low level have been shifted and capacitors C3 and C4 and, thereby, generates a power source potential VDC3 by conducting the charge pump operation.
