| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrical stimulation signal control circuit which reduces potential variations of a microelectrode before and after an application of an electrical stimulation signal to a living body, applies the electrical stimulation signal, and detects bioelectrical signals accompanying the application of the electrical stimulation signal. <P>SOLUTION: The microelectrode, an input amplifier, and a main amplifier are connected to have a state in which an adder circuit is separated from an electrical stimulation signal generating device in the normal time by a control means which controls an interface circuit connected to the microelectrode, the electrical stimulation signal generating device for applying electrical stimulation signals to the microelectrode via the interface circuit, and the main amplifier for amplifying the bioelectrical signals from the microelectrode via the interface circuit by a switch. Then, the microelectrode, the input amplifier, and the main amplifier are separated, and simultaneously, the electrical stimulation signal generating device and the adder circuit are connected. The potential retained in a direct current potential retaining circuit is amplified by a retained potential amplifier with an amplification factor which is the reciprocal of an amplification factor of the input amplifier, added to the electrical stimulation signal from the electrical stimulation signal generating device, and applied to the microelectrode. <P>COPYRIGHT: (C)2010,JPO&INPIT |
