Circuits and methods for artifact elimination
US9684008B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2013 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Apr 5, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3704
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are apparatus and methods that provide the ability to electrical stimulate a physical system, and actively eliminate interference with signal acquisition (artifacts) that arises from the stimulation. The technique implemented in the circuits and methods for eliminating interference connects a discharge path to a physical interface to the system to remove charge that is built-up during stimulation. By placing the discharge path in a feedback loop that includes a recording preamplifier and AC-coupling circuitry, the physical interface is brought back to its pre-stimulation offset voltage. The disclosed apparatus and methods may be used with piezoelectric transducers, ultrasound devices, optical diodes, and polarizable and non-polarizable electrodes. The disclosed apparatus can be employed in implantable devices, in vitro or in vivo setups with vertebrate and invertebrate neural tissue, muscle fibers, pancreatic islet cells, osteoblasts, osteoclasts, bacteria, algae, fungi, protists, and plants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.