| 摘要 |
PURPOSE:To constitute a multiplexer with priority and a few number of transistors (TR) by constituting the titled multiplexer by a 1st metal oxide film field effect TR MOSFET, a complementary conduction MOSFET and a 2nd MOSFET and using a 2nd electrodes of a 1st MOSFET and the 2nd MOSFET as the outputs. CONSTITUTION:With a 1st control line 1 at logic 'H', the 1st NMOSFET 5 is turned on and the logic state of a 1st signal line 3 is selected. With the 1st control line 1 at logic 'L' and the a control line at logic 'H', although the 1st NMOSFET 5 is turned off, the PMOSFET 7 is turned on and the NMOSFET 8 is turned off. Then the 2nd NMOSFET 6 is turned on to give logic 'H' of a 2nd control line 2 to the gate terminal of the 2nd NMOSFET 6 and only the logical state of a 2nd signal line 4 is selected. That is, either the 1st signal line 3 or the 2nd signal line 4 is selected optionally by controlling the level of the 1st and 2nd control lines 1, 2.
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