| 摘要 |
PROBLEM TO BE SOLVED: To enable inexpensive and better recording of signals. SOLUTION: Electrodes 11-1-11-4 are connected to an amplifier part 12 and mounted on a living being. Sensor signals S1-S4 are obtained as low frequency signal of multiple channels from the amplifier part 12. The signals S1-S4 are sequentially selected by a signal selector 13 and each of the signals is converted to a digital data signal Da by an A/D conversion part 14 to be stored into a memory 16. When the volume of the data signal Da stored in the memory 16 reaches a specified value, a mini disc 30 or the like is driven while a specified volume of the data signal Da is read out of the memory 16 to be recorded into the mini disc 30. Hence, the signals can be stored better. This intermittent recording enables prolonged recording without using any large capacity battery. The use of the mini disc allows miniaturization. This also enables borrowing of parts of optical disc devices for recording audio signals and data signals thereby achieving an inexpensive production. |
