In recent days, the real-time application and fast arithmetic operations require highly efficient arithmetic hardware architecture to improve the system performances. The adder plays a vital role in digital circuits, the earlier hardware architecture using conventional CMOS and transmission logic gate based full adder design. Moreover, the techniques using more number of transistors and consume larger power and delay so we proposed the techniques pass-transistor logic and transmission gate based hybrid pass logic. The hybrid technique is used to reduce the number of the transistor, so the delay and power consumption will be reduced when compared with the earlier techniques. The proposed technique design was implemented using 16 transistors in 180nm CMOS technology and it consumes 8.2075nW power and the delay reduced to 5.0146ns