Detector for detecting heart depolarizations
US5456263A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1994 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Nov 9, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/365
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A compact, power-sparing detector for detecting heart polarizations is described. The detector has a first operational amplifier which uses sensed heart signals from a heart as an input signal. By means of feedback coupling via a second operational amplifier, a resistor and a capacitor, the system strives to achieve a minimum voltage gradient across the input terminals of the first operational amplifier. When an electrical signal with a signal slope corresponding to a heart depolarization arrives at the input terminal of the first operational amplifier, the second operational amplifier is no longer able to damp the input signal, and a peak output signal is sent from the first operational amplifier to each of a first comparator and a second comparator, respectively. The comparators produce an output signal as long as the output signal from the first operational amplifier is maximal, and the output signal from the comparators is integrated in a time integrator in order to determine the duration of the output signals. If a sufficient duration elapses, a detection signal is generated at the output terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.