| 摘要 |
PURPOSE:To execute measurement of a difference of physical quantity and also regular measurement, and to raise generality, by constituting so that ''0'' reset is applied by depressing a button switch for a constant interval of time, and also a regular button switch operation is executed by switching. CONSTITUTION:When a button switch 1 is depressed in case when a switching signal 4 is ''1'', a timer start signal 6 becomes ''1'' only when it is being depressed, and a clock signal 8 and a timer clock signal 9 are inputted to D-FFs 21, 22. If said button switch is depressed longer than the time decided by a timer, a reset signal 10 is outputted from a detecting circuit constituted of an NAND 23 and NORs 24, 25. At the same time, reset is applied to T-FFs 21, 22, and the following input is waited for. Also, when the switch 1 is released within the decided time, no reset signal is outputted. When a switching signal 4 is ''0'', a reset signal generating circuit 11 is stopped forcibly, therefore, said switch can be used in the same way as a regular button switch. |
