| 摘要 |
<p>PROBLEM TO BE SOLVED: To operate a flip-flop circuit at high speed which is the important component of a semiconductor integrated circuit and to reduce the space required. SOLUTION: A first latch circuit 1 for fetching data is of dynamic type, a second latch circuit 2 for storing, holding and outputting the data is of a static type. Both circuits 1 and 2 are connected serially and connected through a buffer circuit 14 to an output terminal Q. A switch control circuit 15 receiving a clock CK complementarily operates a first switch circuit 11 and a second switch circuit 12. A capacitor Cm parasitic to a node A holds a signal D only in the OFF period of a switch 11, shifts it to a second storage circuit 13 at the fall of the CK and statically holds it. The second storage circuit 13 is composed of an inverter and a clocked inverter for instance and constitutes a positive feedback loop by control from the switch control circuit 15.</p> |
