| 摘要 |
<p>PURPOSE:To increase both the economical property and reliability, by producing the gate signal with the changing point of waveform of the input signal set as the start point and extracting the changing point signal corresponding to the changing point included in the time width of the gate signal and in the form of the desired frequency component. CONSTITUTION:The changing point is detected by the differentiating circuit 4 for the input signal that is supplied from the signal input terminal 1 and supplied to the counter 5 via the AND gate 7A. The output of the counter 5 is supplied to the counter 6, and the output of the counter 6 is applied to the AND gate 7B via the inverter 8B. The significant changing point signal contained in the prescribed time width of the gate signal is extracted at the gate 7B. Then the desired frequency component contained in the input signal waveform is extracted.</p> |
