| 摘要 |
PURPOSE:To improve the integration density and the production yield by using a vertical output line of the (m-1)-th step inverter in common as a vertical line of the same step and a vertical input line of the next m-th step. CONSTITUTION:A pair of MOSFETs TL1 and TU1, and a pair of TL2 and TU2 compose effectively 2-layer construction complementary inverter of m-th step and (m-1)-th step. A pair of TL3 and TU3 forms effectively 2-layer construction complementary switch, to which pulses p, -p are impressed. Similarly, pulses -p, p are impressed to a pair of TL4 and TU4. A vertical output line 23c which connects a lower layer output line 23a and an upper layer output line 23b of (m-1)-th step inverter is the output line of the (m-1)th inverter, and transmits an output signal of (m-1)-th inverter to an input lines 14a, 14b of the m-th step inverter when the TU4 and TL4 are closed by the pulses p and -p. In this way, the number of the vertical lines necessary for composing one step of inverter and a switch becomes only one, and the area factor (integration density) and the yield at the time of production will be enhanced. |
