| 摘要 |
According to one embodiment, a binarization circuit includes a comparator, first and second charging-discharging circuits, and a control circuit. The comparator compares an input voltage with a reference voltage and outputs a signal in accordance with a differential voltage between the input voltage and the reference voltage. The first charging-discharging circuit generates a first voltage by multiplying the differential voltage by a first charge-discharge factor. The second charging-discharging circuit generates a second voltage by multiplying a difference between the differential voltage and a threshold voltage by a second charge-discharge factor greater than the first charge-discharge factor. The control circuit compares the differential voltage with the threshold voltage, and switches between turn-on and turn-off of the second charging-discharging circuit based on a difference between the differential voltage and the threshold voltage. A sum of the reference voltage of a preceding clock and the first voltage of the preceding clock is supplied to the comparator when the second charging-discharging circuit is turned off. A sum of the reference voltage of the preceding clock, the first voltage of the preceding clock, and the second voltage of the preceding clock is supplied to the comparator when the second charging-discharging circuit is turned on. |
