Acquisition device to limit leakage current in electrophysiological signal recording devices

A multiple active transducer acquisition device comprising:

• an acquisition device, the acquisition device comprising:
• a first active transducer connected to a first transimpedance amplifier and intended to contact a body tissue;
• an alternate voltage source connected to the first active transducer and is opposite to the first transimpedance amplifier;
• a direct voltage source connected to the first active transducer, parallel to the alternate voltage source;
• a first capacitor connected between the alternate voltage source and the first active transducer;
• a first resistor connected between the direct voltage source and the first active transducer, parallel to the first capacitor and the alternate voltage source;
• and
• a second capacitor connected between the first active transducer and first the transimpedance amplifier;
• and
• one or more acquisition modules, each of the one or more acquisition modules comprising:
• a second active transducer;
• a third capacitor connected to the second active transducer;
• a second transimpedance amplifier connected to the third capacitor;
• and
• a second resistor connected in parallel with the second transimpedance amplifier;
• and
• wherein the second active transducer of each acquisition module is connected parallel with the first active transducer of the acquisition device opposite to the third capacitor.

A multiplexed array acquisition device comprising:

• “m×n” active transducers situated in each “m×n” position of a matrix with “m” columns and “n” rows;
• m common first capacitors;
• m common first resistors;
• m common alternate voltage sources;
• and
• m common direct voltage sources;
• wherein each common first resistor is connected in parallel to each common first capacitor, and each common first capacitor is connected to each common alternate voltage source and each common first resistor is connected to each common direct voltage source;
• n common second capacitors;
• n common transimpedance amplifiers;
• and
• n common second resistors;
• wherein each common second capacitor is connected to each common transimpedance amplifier and each common second resistor is connected parallel to each common transimpedance amplifier;
• and
• wherein:
• the active transducers situated in each column of the matrix are connected to each common first capacitor and each common first resistor, and
• the active transducers situated in each row of the matrix are connected to each common second capacitor.