| 主权项 |
1. A method of generating a periodic signal comprising:
detecting when a charging state of a storage element crosses a first threshold, detecting comprising using a first circuit having a first propagation delay; changing a charging state of a storage element at a first rate until the charging state crosses the first threshold at a first time based on the detecting; preserving the charging state of the storage element; after preserving the charging state, continuing changing the charging state at the first rate upon receipt of a first clock edge indicating a beginning of a first time interval; detecting when a charging state of the storage element crosses a second threshold, detecting comprising using the first circuit having the first propagation delay; and ending the first time interval when the charging state crosses the second threshold at a second time based on the detecting. |
