Dry electrode system for detection of biopotentials

A dry electrode pad for enabling electrical and mechanical connection between the skin of a living body and an amplifying circuit electrically coupled to a monitor, comprising:

• a resilient conductive pad having first and second opposed sides and a flexible conductive film applied to at least one of said sides, said flexible conductive film adapted to contact the skin of said living body;
• and
• adhesive means having opposed first and second adhesive surfaces provided on selected portions of said conductive pad, said conductive pad adhering to said adhesive means, said first adhesive surface adapted to adhere to the skin such that said flexible conductive film of said conductive pad is in electrical contact with the skin, said second adhesive surface adapted to adhesively engage said amplifying circuit with the other side of said conductive pad electrically in connection with said amplifying circuit.

A dry electrode system for the detection of biopotentials existing on the surface of the skin of a living body, comprising:

• a dry electrode pad comprising a resilient conductive pad and having opposed sides, one of which is adapted to contact the skin of said living body, and adhesive means, having first and second adhesive surfaces, said first adhesive surface adapted to adhere said resilient conductive pad to said skin, said resilient conductive pad comprising a flexible conductive film provided on at least one of the opposed sides of said resilient conductive pad, said conductive film maintaining an AC noise voltage (0.15 to 35 Hz) of not more than 150 .mu.V peak under conditions ranging from dry to saturation with a 0.9% saline solution;
• and
• an amplifying circuit means adapted to adhere to said second adhesive surface and to be connected to the other side of said conductive pad for amplifying a biopotential transmitted via said dry electrode pad to said amplifying circuit means.

A dry electrode system according to claim 51, wherein said amplifying circuit means further comprises:

• a voltage follower operational amplifier having a non-inverting input connected to the first shield, an inverting input connecting to an output of said voltage follower operational amplifier and to said second shield.

A dry electrode system according to claim, 43, wherein said adhesive means comprises:

• first and second adhesive coatings formed on portions of respective opposed surfaces of said conductive pad and serving as said first and second adhesive surfaces, respectively.