Device for filtering ECG signals
US5772603A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1997 |
| Grant date | Jun 30, 1998 |
| Priority date | — |
| Expiry date | Jun 3, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/308
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for filtering ECG signals has an A/D converter and a filter unit connected to the converter's output. The filter unit includes a filter, or a combination of filters with a non-linear phase response such that signals with frequencies in the passband of the filter, or the combination of filters, are delayed more than signals with frequencies in the transition band between the passband and the suppressed frequency band of the filter, or the combination of filters. A method for producing an FIR filter, with a phase response opposite to the phase response of a filter for filtering out DC components, or an IIR filter, suitable for use in the above-described device, is also disclosed in which the impulse response from the filter for filtering out DC components and low-frequency components or the IIR filter is reversed in time and sampled. The sampled values are then used for determining coefficients for the FIR filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.