| 摘要 |
PURPOSE:To enable an operation of a short delay time even in case the capacity which is connected to an output is large or a TTL, etc. is connected, by driving the gate of a field effect transistor for power supply current with an output of a front stage. CONSTITUTION:The basic constitution of this example is equal to a conventional one, and the 2nd stage enclosed by a dotted line, i.e., an output stage inverter differs. That is, the gate of a current source FET provided at an output terminal is not grounded but connected to an output terminal of a front stage via a diode D44 for level shift. An MESFETQ37 is used for current source of the diode D44. When the gate of an FET-Q32 is set at level ''1'', the gate of an FET-Q32 is set at level ''1'' via the diode D44. Therefore the FET-Q36 can extract quickly the electric charge of above-mentioned gates even in case the FET group is connected in parallel to an output terminal. |
