Biopotential signal source separation using source impedances
US7555335B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2004 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Jan 4, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3956
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Cardiac methods and devices that separate signals using at least two composite signals acquired at least at two input impedances. A target source impedance may be selected, and a cardiac signal may be separated from composite signals using the selected target source impedance. Medical systems include a cardiac device having a housing that provides amplification circuitry configured to have a first amplifier input impedance and a second amplifier input impedance, such as using two separate circuits or switching between two input impedances. One or more electrode assemblies are coupled to the amplification circuitry. A signal processor is provided in the housing configured to separate a source signal using a first composite signal detected at the first input impedance and a second composite signal detected at the second input impedance. The phase response of the first input amplifier circuit is about equal to that of the second input amplifier circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.