| 摘要 |
PURPOSE:To avoid the effect of circuit capacitance, by charging and discharging a load capacitance connected to an output terminal with gate control, through the connection of a circuit having level shift function, between each input/output terminal of a circuit constituting an NOR logic and a gate of normal conduction type. CONSTITUTION:A circuit constituting an NOR logic is provided with a gate consisting of a plurality of normal conduction type FETT1-Tn, the drains are connected in common to a load FETTL and also to output terminals OUT1- OUTm. The sources of the FETT1-Tn are connected in common, and a level shiaft circuit consisting of capacitors C1-Cn and diodes connected to constant current source FETTD1-TDn is connected between the gate of the FETT1- Tn and n sets of input terminals IN1-INn. The load capacitance connected to the terminals OUT1-OUTn is charged and discharged through the control of gate, allowing to make the manufacture of capacitors C1-Cn easy, to eliminate the effect and to make the operation of circuit stable. |
