Design and implement of high fan-in logic in high-speed circuit

Two new high fan-in logics, grouped domino logic and complementary boost logic (CBL), are proposed to overcome the problem of circuit speed and noise immunity. Grouped domino logic not only speeds up the circuit, but also simplifies the design of keeper. CBL develops from source following evaluation gate (SFEG), invite complementary boost logic to speed up the circuit. In 0.13 um technology, we compare the grouped domino logic and CBL with traditional domino logic, result shows that the parameter of grouped domino logic is better than traditional domino logic, and for CBL, the unity noise gain (UNG) of CBL is about 90% of traditional domino logic whose keeper ratio is 1, but the speed of CBL is 3 times faster than domino logic.