I am currently working on a bio-impedance device which will measure a human patient's skin impedance. Lately, I have been stumped. I am trying to devise a way to ensure the patient's safety. I have been looking into isolation method through isolation transformers and opto-couplers. I have been having a hard time though locating a part that will allow me to pass sine wave signals at frequencies up to 1MHz. The project is set up so far as follows:
Function Generator > Current Limiter > Patient > Differential Amp. > Oscilloscope
I would like to float all the grounds of the components in touch with the patient. This includes the ground points of the differential amplifier. The currents I am working with are minimal due the the current limiter (800uA). This will be done using Current Limiting Diodes.
Any help would be much appreciated.
Thanks
Function Generator > Current Limiter > Patient > Differential Amp. > Oscilloscope
I would like to float all the grounds of the components in touch with the patient. This includes the ground points of the differential amplifier. The currents I am working with are minimal due the the current limiter (800uA). This will be done using Current Limiting Diodes.
Any help would be much appreciated.
Thanks