| 摘要 |
PURPOSE:To output one timing signal without level loss from a timing signal incoming at random with simple constitution by constituting the circuit of a transmission gate MOSFET and a bootstrap boosting circuit. CONSTITUTION:With a timing signal OE0 at a high level, when a Q32 of a transmission gate is turned on via an MOSFETQ31 and a timing signal phiOP reaches a high level before a delay signal OE1 of the signal OE0 goes to a high level, the signal phiOP is boosted by the self-bootstrap operation of the capacitance between the gate and channel of the Q32 and outputted as a timing signal phiOP'. On the other hand, when the signal OE1 goes first, the signal phiOP is boosted by a bootstrap capacitor CB2 connected to the gate of the Q32, outputted as the signal phiOP', and when the signal phiOP takes precedence over the OE0, the bootstrap is applied with a delay similarly. Then one timing signal is outputted without level loss among timing signals incoming at random with simple constitution. |
