| 摘要 |
PURPOSE:To offset the fluctuation of detecting level induced by unsteady rest of a subject to be detected, etc. and to improve the accuracy for decision of an output, by using the output of a reference input amplifier to the input of one side of a comprator via a generator of the reference voltage which is proportional to the output of said amplifier. CONSTITUTION:When the mottled kidney beans increase as a whole as if they approximate to the side of each detecting terminal, the output of a comparator 16 is changed to ON from OFF since both the intermediate value 21 of a reference input and a comparison input 22 rise up from the reference position 25 at time points t2-t4, and the amplified value 22 of the comparison input is larger than the value 21 at the time point t3. Then the output of the comparator 16 is turned off since the value 22 is smaller than the value 21 at the time point t4. However, the value of the input 22 is larger at the point t4 than that at the point t2 and at the same time larger at the point t4 than the intermediate value at the point t2. This is due to the fact that the level of the reference input increases compared with its level at the point t2 by a degree equivalent to an increment of the mottled kidney beans. |
