Apparatus and methodology for digital telemetry of biomedical signals
US5205294A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Feb 19, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/903
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Biomedical information is directly digitally telemetered from the patient through a frequency modulated transmitter to a remote receiver and computer station. DC offset on the biopotential leads and signals from the patient is compensated by converting the output of the amplifier, such as an electrocardiographic amplifier, into digital format, determining the average or DC component of the digital signal, and generating a digital correction word which is then converted into analog form and fed back into the input of the electrocardiographic amplifier to cancel out the DC offset. The same circuitry is used to insert a standard test signal instead of a correction signal and the output of the amplifier is then checked not to determine its DC component, but to determine whether or not the gain of the electrocardiographic amplifier is performing at a predetermined calibration point. If not, a digital correction word is generated and provided as a correction signal to the programmable gain amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.