Angela M. Muttonen;William J. Linder;Michael J. Lyden;George D. Ritzinger
发明人:
Michael J. Lyden,William J. Linder,Angela M. Muttonen,George D. Ritzinger
申请号：
US12350728
公开号：
US09357944B2
申请日:
2009.01.08
申请国别(地区):
US
年份:
2016
代理人:
摘要：
An implantable medical device performs impedance measurement and demodulation, such as for obtaining lead impedance measurements, or thoracic impedance measurements, such as for extracting respiration, cardiac stroke, or fluid status information. A 4-point FIR filter demodulator can be used to demodulate a two-phase current excitation waveform. The demodulator can also be used to measure noise for triggering a noise response. Among other things, an increased excitation current level can be used when noise is deemed to be present.
