High dynamic range sensing front-end for neural signal recording systems
US10778165B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2015 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Nov 20, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/48
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A high dynamic range sensing front-end for bio-signal recording systems in accordance with embodiments of the invention are disclosed. In one embodiment, a bio-signal amplifier includes an input signal, where the input signal is modulated to a predetermined chopping frequency, a first amplifier stage, a parallel-RC circuit connected to the first amplifier stage and configured to generate a parallel-RC circuit output by selectively blocking an offset current, a second amplifier stage connected to the parallel-RC circuit that includes a second input configured to receive the parallel-RC circuit output and generate a second output that is an amplified version of the input signal with ripple-rejection. Further, the bio-signal amplifier can also include an auxiliary path configured for boosting input impedance by pre-charging at least one input capacitor. In addition, the bio-signal amplifier can also include a DC-servo feedback loop that includes an integrator that utilizes a duty-cycled resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.