| 摘要 |
PURPOSE:To eliminate the rounding of a sensor signal and to correctly lead sensor information out by providing a latch circuit which samples and latches sensor outputs in order with a clock and comparing the respective latch outputs. CONSTITUTION:Clock pulses whose period is shorter than the pulse width of the sensor output of a sensor device are supplied to respective cascaded shift registers 1 - 3 and when the input sensor output has correct logic '1', '1' is latched in the respective shift registers 1 - 3 and '1' is outputted by the AND gate of a comparing circuit 4 to obtain correct sensor information. If a noise appears in the sensor output, the shift registers 1 - 3 have the same latch state, so the output of the AND gate is still '0' and the noise can be removed. Consequently, the rounding of the sensor output is eliminated by the small circuit constitution and an accurate sensor correction output is obtained. |
