Patent ID: 7477933

Claim:
A portable electrocardiograph comprising: first and second stacked-layered circuit boards; an electrocardiogram measurement device that measures an electrocardiogram to obtain electrocardiogram data; and a radio communication device that radio-transmits the electrocardiogram data obtained by said electrocardiogram measurement device in real time; and a logic circuit that analog-digital converts said electrocardiogram data, wherein said first and second stacked-layered circuit boards each include a plurality of circuit boards and a ground conductor layer provided between any ones of said plurality of circuit boards, said logic circuit is arranged between one side of said first stacked-layered circuit board and one side of said second stacked-layered circuit board, said electrocardiogram measurement device is arranged on the other side of said first stacked-layered circuit board, and said radio communication device is arranged on the other side of said second stacked-layered circuit board, said ground conductor layer is disposed so that said electrocardiogram measurement device and said radio communication device are isolated from each other, and said radio communication device includes a transmission circuit.