New low power adders in Self Resetting Logic with Gate Diffusion Input Technique

Abstract

The objective vividly defines a new low-power and high-speed logic family; named Self Resetting Logic with Gate Diffusion Input (SRLGDI). This logic family resolves the issues in dynamic circuits like charge sharing, charge leakage, short circuit power dissipation, monotonicity requirement and low output voltage. In the proposed design structure of SRLGDI, the pull down tree is implemented with Gate Diffusion Input (GDI) with level restoration which apparently eliminated the conductance overlap between nMOS and pMOS devices, thereby reducing the short circuit power dissipation and providing High Output Voltage VoH. The output stage of SRLGDI has been incorporated with an inverter to produce both true and complementary output function. The Resistance Capacitance (RC) delay model has been proposed to obtain the total delay of the circuit during precharge and evaluation phases. Using SRLGDI, the primitive cells and 3 different full adder circuits were designed and simulated in a 0.250 μm Complementary Metal Oxide Semiconductor (CMOS) process technology. The simulated result demonstrates that the proposed SRLGDI logic family is superior in terms of speed and power consumption with respect to other logic families like Dynamic logic (DY), CMOS, Self Resetting CMOS (SRCMOS) and GDI.

Keywords

• Self Resetting Logic
• Gate Diffusion Input Technique
• Dynamic logic
• Full adders