| 摘要 |
PURPOSE:To obtain stable logical output due to switching of a switch, by preventing chattering with a simple circuit constitution, through the provision of the two logic inverters in cascade connection and switch circuit and grounded capacitor. CONSTITUTION:Logic inverters N1, N2 are in cascade connection, and one end of the single pole switch S is connected to the input terminal A of one inverter N1, and the output terminal B of the inverter N2 is connected to the input terminal A via the resistance R1. Further, another end of the switch S is connected to the capacitor C1 charged at the application of power supply, and this capacitor C1 is connected to the output terminal via the resistance R2 and to the connecting point C between the inverters N1 and N2, to constitute the switch circuit with latch. The chattering generated at switching of the switch S is absorbed in the capacitor C, and the potential across the switch S is made to the same potential at the same time when the switch S is closed by the positive feedback due to the resistance R2 to prevent chattering and to obtain the logical output due to the switching of the switch S. |
