| 摘要 |
PURPOSE:To obtain a comparator circuit which contains a means to compensate the shift of the comparison reference value caused by the effect of the low frequency component contained in the data signal. CONSTITUTION:Input data signal x6 passes through high-band pass filter 3 consisting of capacitor 12 and resistor 13 to be cut off the DC component and then limited for its amplitude through limiter 4. The signals passed through limiter 4 is compared with the comparison reference voltge (zero level) at comparator 5. And output x4 of comparator 5 is fed back to the non-reverse input terminal via resistor 14. In such constitution, the voltage can be prevented from dropping down to the zero level at the data signal input part of the comparator, and at the same time the miscomparison caused by the transient reply can be prevented at the signal input time. |
