Differential keeper
March 13, 2024
- Figure shows a differential keeper for a dual-rail domino buffer.
- When the gate is precharged, both keeper transistors are OFF and the dynamic outputs float. As one of the rails evaluates low, the opposite keeper turns ON.
- The differential keeper is fast, because it does not oppose the falling rail.
- As long as one of the rails is guaranteed to fall promptly, the keeper on the other rail will turn on before excessive leakage or noise causes failure.
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| Differential keeper |
