CHARGE RECYCLING OF POWER GATED CMOS CIRCUIT AND SUPER CUTOFF CMOS CIRCUIT

摘要

PPROBLEM TO BE SOLVED: To reduce the power consumption in mode transition of a power-gated circuit such as an MTCOMS circuit and an SCCMOS circuit, to shorten a wake-up time, and to reduce noise resulting from a power gating configuration. PSOLUTION: The circuit has: a first virtual ground node between a first circuit block and a first sleep transistor; a second virtual ground node between a second circuit block and a second sleep transistor; and a transmission gate (TG) or pass transistor making possible charge recycling between the first circuit block and the second circuit block during change from an active mode to a sleep mode by the first circuit block, or change from the sleep mode to the active mode by the second circuit block or reverse change thereof while the first virtual ground node is connected to the second virtual ground node. PCOPYRIGHT: (C)2009,JPO&INPIT