Patent ID: 11950934
Assignee: VERILY LIFE SCIENCES LLC
Field: Medical technology (Instruments)
Classification: CPC A  H | IPC A  H

Claim 0:
1. A front-end for a neural recording system, the front-end comprising:
a sensor comprising first and second sensor output terminals;
a feedback subsystem comprising first and second feedback output terminals;
a first chopper comprising first and second input terminals, and first and second output terminals, wherein:
the first input terminal of the first chopper is electrically coupled to the first sensor output terminal,
the second input terminal of the first chopper is electrically coupled to the first feedback output terminal,

a second chopper comprising first and second input terminals, and first and second output terminals, wherein:
the first input terminal of the second chopper is configured to be electrically coupled to the second sensor output terminal,
the second input terminal of the second chopper is configured to be electrically coupled to the second feedback output terminal;

an amplifier comprising first and second amplifier input terminals;
a first capacitor coupled to the first output terminal of the first chopper and the first amplifier input terminal;
a second capacitor coupled to the second output terminal of the first chopper and the second amplifier input terminal;
a third capacitor coupled to the first output terminal of the second chopper and the second amplifier input terminal; and
a fourth capacitor coupled to the second output terminal of the second chopper and the first amplifier input terminal;
wherein the first and second choppers are configured to operate in a first phase and a second phase, wherein:
during the first phase:
the first sensor output terminal, the second feedback output terminal, and the first and fourth capacitors are in electrical communication with the first amplifier input terminal, and
the second sensor output terminal, the first feedback output terminal, and the second and third capacitors are in electrical communication with the second amplifier input terminal; and

during the second phase:
the first sensor output terminal, the second feedback output terminal, and the second and third capacitors are in electrical communication with the second amplifier input terminal, and
the second sensor output terminal, the first feedback output terminal, and the first and fourth capacitors are in electrical communication with the first amplifier input terminal.