| 摘要 |
PURPOSE:To easily reproduce an accurate 50% duty waveform, by using a delay circuit, an FF circuit, and a differentiating circuit in combination. CONSTITUTION:An input signal (a) with a period T supplied from an input terminal 1 has been differentiated of rise by a differentiating circuit 7 to obtain a differential output (b). This differential output (b) sets a D type FF circuit 6 directly. The input signal (a) is further supplied to a delay circuit 3, where it is delayed accurately by T/2 to obtain a delay output (c). Then, a rising edge of this delay output (c) resets the FF circuit 6. Therefore, the circuit 6 is set and reset repeatedly, so that the FF circuit 6 outputs a 50% duty rectangular wave, which has the same frequency with the input signal (a) to an output terminal 5. Thus, the accurate 50% duty waveform is reproduced easily. |
