| 摘要 |
The present invention discloses a &ngr;MOS based multi-valued counter unit. The counter unit includes a &ngr;MOS source follower and at least a control gate connected the &ngr;MOS source follower. The control gate includes a first dual-value D flip-flop, a second dual-value D flip-flop, an AND gate, and an OR gate. The present invention utilizes the &ngr;MOS to replace the complicated threshold value operations of the multi-value logic. The current invention implements the true multi-value logic and a multi-base multi-value counter by increasing the number of the dual-value D flip-flop, and connecting the dual-value D flip-flop to the input control gate of the &ngr;MOS follower. Comparing to the conventional multi-value counter, the present invention reduces the necessary components in constructing the counter, and it also reduces the cost and power consumption. The present invention applies the asynchronous carry-over concept to implement the multi-digit multi-value counter, and it also has been verified by the simulation of P Simulation Program with Integrated Circuit Emphasis (SPICE). |
