Signal processing circuit for pyro/piezo transducer
US6702755B1 · kind B1 · utility
57Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 2001 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Aug 2, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B7/003
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An adapter for interfacing a pyro/piezo sensor to a polysomnograph machine comprises a differential input amplifier coupled to receive the raw transducer signals from a PVDF film transducer to provide a requisite gain while rejecting common mode noise. The resulting amplified signal is filtered to separate the pyro signal from the piezo signal and the piezo signal is further applied to half-wave rectifier stages that function to remove baseline noise from the piezo signal before its being applied to a microphone channel of an existing PSG machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.