| 摘要 |
PURPOSE:To output the same output pulse signal as the pulse width of an input pulse signal with a prescribed pulse or above while a noise is absorbed with a simple constitution by providing an integration circuit to integrate the input signal and a comparing circuit to select first and second thresholds. CONSTITUTION:The title circuit provides an integration circuit 1 and a comparing circuit 2, and the comparing circuit 2 compares the level of the rise part of the integration output signal of the integration circuit 1 with a first threshold, and when the level is higher than the first threshold, next, switching is executed to a second threshold lower than the first threshold, and the level of the fall part of the integration output signal is compared. The comparing output signal of the pulse width from when the level is higher than the first threshold until the level is lower than the second threshold is outputted, and first and second thresholds are selected so that the pulse width can be the same as the pulse width of the input signal. Thus, the noise of a prescribed pulse width or below can be surely removed and the pulse signal of the prescribed pulse width or above can be outputted without changing the pulse width. |
