Patent ID: 11857328
Assignee: T&W ENGINEERING A/S
Field: Basic communication processes (Electrical engineering)
Classification: CPC A  H | IPC A  H

Claim 0:
1. An active electrode component having an electrode for sensing a bio potential and adapted for providing a bio potential signal, and furthermore comprising:
a shield placed adjacent to and electrically insulated from said electrode;
an integrated amplifier component adapted for providing a buffered signal path and comprising:
a first mixer formed on an integrated circuit chip for frequency shifting the bio potential signal from a basic frequency range to a higher frequency range,
an integrated amplifier formed on said integrated circuit chip and receiving the frequency shifted signal from the first mixer, and having a unit-gain, and
a second mixer formed on said integrated circuit chip for frequency shifting an output signal from the integrated amplifier from the higher frequency range to the basic frequency range,
the integrated amplifier component being configured as a chopper modulation amplifier outputting a buffered output signal;
wherein an output of the integrated amplifier component is connected to the shield,
whereby the shield adjacent to the electrode receives the buffered output signal,
the integrated amplifier component being adapted for actively driving an electrical potential of the shield and thereby providing an active shielding of the electrode,
wherein said integrated amplifier has the unit gain maintained at least in part by a feedback signal on a feedback branch from a first point downstream of said second mixer to a second point upstream of said first mixer.