| 摘要 |
PURPOSE:To prevent the chattering component of an input signal from appearing in an output signal in a multiplying device which obtains the output signal having two-fold frequency of the input signal. CONSTITUTION:The output of an EXOR(exclusive OR circuit) 4 which takes the input signal as one input is inputted to the clock input of a D-FF 1. The data input of the D-FF 1 is fixed to the high level. The output of the D-FF 1 is delayed in a delay device 2 by a time T1. The D-FF 1 and the delay device 2 are reset by the output of the delay device 2, and the output of a T-FF 3 is inverted. The output of the T-FF 3 is inputted to the other input of the EXOR 4. The delay time T1 of the delay device 2 is made longer than the duration of chattering of the input signal to obtain the multiplication output free from chattering from the D-FF 1. |
