| 摘要 |
PURPOSE:To log data efficiently, by obtaining a difference between the maximum and minimum value of signals inputted along a time axis, generating a signal when the value is a prescribed value or over, and calculating the mean value when analyzing the active current of a heart. CONSTITUTION:An A/D converter 2 inputs an analog signal 1, converts the signal 1 into a digital value at each prescribed interval in synchronizing with the signal of a timer 3 and gives the output to a maximum and minimum value detector 4. Maximum and minimum value registers 5, 6 store the output level of the detector 4 respectively and output the output to the detector 4, a differential device 7 and an average device 9. The differential device 7 receives the maximum and minimum value of the registers 5, 6 and outputs the level difference to a comparator 8. The comparator 8 compares this signal with a prescribed threshold value and outputs a data transfer signal 12 when the level difference of the device 7 reaches the amplitude threshold value. The average device 9 obtains the mean value of the output of the registers 5, 6 and outputs the average value only when the signal 12 is inputted. |
