| 摘要 |
PURPOSE:To facilitate the formation of an LSI as well as the designing, by obtaining an AND between an input signal and the outputs of two multivibrators that transmit a pulse having equal duration to the period of the cutoff frequency of a high or low range frequency band to be eliminated. CONSTITUTION:The first monostable multivibrator MV2 is controlled by a clock in accordance with a cutoff frequency fHC of a high range frequency band to be eliminated to transmit a pulse of equal duration to the period of the frequency fHC and at the same time is capable of retriggering to function to be triggered by the fall of an input signal 1. In the same way, the 2nd monostable multivibrator MV3 functions to transmit a pulse having duration equal to or smaller than the period of a cutoff frequency fLC of a low range frequency band. Then an AND is obtained between the Q outputs of MV2 and MV3 and the input signal 1 through an AND gate 4 to be delivered OUT. |
