| 摘要 |
PURPOSE:To obtain the clock detection circuit able to completely eliminate clock mis-detection even in the case of an input of noise or the like. CONSTITUTION:The detection circuit is provided with a 1st monostable multivibrator circuit OS1 rising with an input of a clock input signal A, with a 2nd monostable multivibrator circuit OS2 falling down by a prescribed time T with rise of an intermediate frequency signal B being an output of the OS1 and a gate circuit G operated at the rise of two signals being the intermediate frequency signal B and a protection signal C. |
