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Active, multiplexed digital electrodes for EEG, ECG and EMG applications

  • US 20050215916A1
  • Filed: 03/29/2005
  • Published: 09/29/2005
  • Est. Priority Date: 03/29/2004
  • Status: Abandoned Application
First Claim
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1. An apparatus for sensing a plurality of biopotential voltages on a subject, comprising:

  • a reference conductive contact attachable to the skin of the subject, first and second digital electrodes attachable to the skin of the subject, each digital electrode comprising at least one signal conductive contact coupled to an active frequency filter, coupled responsive to a differential input of the reference conductive contact and the respective signal conductive contact, and an analog-to-digital converter coupled to an amplified filtered output of the active frequency filter to produce a respective amplified digital signal;

    an electromagnetic channel;

    a controller in two-way communication over the external electromagnetic channel and operatively configured to sequentially select the respective amplified digital signal from the first and second digital electrodes; and

    a multiplexer communicating between each digital electrode and the electromagnetic channel responsive to the controller to communicate a digital output from the selected digital electrode.

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