| 摘要 |
PURPOSE:To enable accurate measurement of concentration eliminating effect of noise, by blocking an output of at least a precedence peak value signal when a signal is given to indicate that a results of discrimination signal from a code discrimination means is not a normal code. CONSTITUTION:When a glucose solution is brought into contact with a immobilized enzyme film, current is generated corresponding to production of H2O2 to be drawn outside through terminals 6 and 6. The resulting current signal of supplied to a current value detection circuit 7 and a current value signal obtained is supplied to a differentiation circuit 8 to obtain a current primary differential value. The differential value thus obtained is supplied to a code detection circuit 9 and a peak detection circuit 10 to discriminate the polarity, between positive and negative, of a code of the differential value while the max. thereof is obtained. When a judgement is given that no effect of noise exists, the maximum of the differential value is supplied to an arithmetic processing section 11 to form a glucose density detection signal. On the other hand, when judgement is given that effect of noise exists, a high level of reset signal is outputted from a resetting circuit 12 to reset the contents of the circuit 10 at this point. |
