Clinical application of an active electrode using an operational amplifier.
An active electrode (d10 mm, t6 mm) is presented, that functions as an impedance transformer (an input impedance > 10 G omega, an output impedance < 1 omega) by means of which we can derive surface EMG without any skin preparation and paste. This electrode was compared with a conventional one, and it was ascertained that the electrode could be replaced with the conventional one, and, moreover, it was preferable because it required less preparation time, and was less affected by environmental noise.
Nishimura
S
S
Institute of Biomedical Engineering, Faculty of Science and Technology, Keio University, Kanagawa, Japan.
Tomita
Y
Y
Horiuchi
T
T
D000669:Amplifiers, Electronic; D017097:Electric Impedance; D004566:Electrodes; D004594:Electrophysiology / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans