SKEW PREVENTING UNIT WITH DELAYING UNIT AND SIGNAL TRANMITTING CIRCUIT HAVING THE SAME

摘要

A skew preventing unit with a delaying unit and a signal transmitting circuit having the same are provided to reduce the layout area by using the transmission gate as the delay unit. A transmission gate(T) is comprised of a PMOS transistor and an NMOS transistor. The source and drain of the PMOS transistor and the NMOS transistor are connected each other. The transmission gate is set up in the turn on mode. The voltage(VLow) of the low level is applied to the gate of the PMOS transistor. The voltage(VHigh) of the high level is applied to the gate of the NMOS transistor. The transmission gate has the delay time of a plurality of inverter chain levels. The skew property is secured by making the length of the gate electrode of the transistor comprising the transmission gate shorter than the length of the existing gate electrode. The output signal of the transmission gate is buffered by a buffer unit(12).