Low swing dynamic circuit

摘要

Embodiments of the present disclosure enable low swing dynamic circuits with reduced dynamic power and leakage power. In an embodiment, a level detector circuit monitors the pre-charge voltage level of the dynamic node of a dynamic circuit and discontinues the charging of the dynamic node when the pre-charge voltage exceeds a logic high reference voltage. The logic high reference voltage is selected below a supply voltage of the dynamic circuit, resulting in a low swing dynamic circuit. In another embodiment, the pull-down logic circuitry is disconnected from the dynamic node when the dynamic node voltage falls below a logic low reference voltage, above a ground voltage. In another embodiment, a DC keeper circuit of the dynamic circuit is configured based on the pre-charge level of the dynamic node.

主权项

1. A dynamic circuit, comprising:
a dynamic node; a first charge circuit configured to couple a supply node to the dynamic node during a pre-charge interval; and a level detector circuit, coupled to the dynamic node, configured to compare a voltage of the dynamic node to a logic high reference voltage and to control the first charge circuit to disconnect the supply node from the dynamic node when the voltage of the dynamic node reaches or exceeds the logic high reference voltage.