| 摘要 |
PURPOSE:To obtain the comparison reference voltage for the comparator by compounding the levels of the input signal, at the same time ensuring the steady waveform shaping for the multi-shape input signal featurng the lapping low and high levels via the delay circuit. CONSTITUTION:Diodes 6 and 7 plus diodes 8 and 9 are the circuits which are designed to secure the OR of high and low levels each. Now if the signal featuring the low and high level states alternately is applied to inputs L1 and L2, voltages Va and Vb are produced. These voltages are then divided by resistances R3 and R4 (R3=R4) and then used for comparison reference voltage Vs of comparators 3 and 4 each through delay circuit 5. As a result, voltage Vs features the intermediate level between Va and Vb and follows the level fluctuation of the input. Thus the optimum voltage Vs can always be maintained. And accordingly, the steady waveform shaping is possible at all times regardless of the level fluctuation of the input signal. |
