| 摘要 |
PURPOSE:To dispense with any externally added chattering removing circuit by a method wherein the time signalling is made ready detecting a change in the code output of the regular time and executed by a contact signal of a switch working at the regular time while the time signalling ready output is halted. CONSTITUTION:The code output of the corresponding regular time is outputted from an output circuit EN1 at the specified time before the regular time, a change in the code output detected with a comparison circuit CM and the code output after the change is memorized in a latch circuit L2. At the same time, a gate G2 is opened to make the time signalling ready. When a contact signal from a switch S with a minute hand cam is fed to the terminal (t) at the regular time, it is fed to a time signalling circuit N through the gate circuit G2 to signal the time. At the same time, a control circuit K halts the time signalling ready output. |
