Analogic Corporation

Jeremy L Muller

Hans J Weedon

Enrico Dolazza

Robert G Hohlfeld

Alexander Kolchinsky

Richard McMorrow

Gordon W Neff

G Peter Pulsifer

Joseph T Pappalardo

The disclosed system for measuring the periodic content of an input signal includes an autocorrelation function generator for generating a sequence of autocorrelation functions. Each of the autocorrelation functions is representative of an autocorrelation function of a portion of the input signal. The system further includes a temporal filter for filtering the autocorrelation functions and thereby generating a lag histogram. In other forms the system may comprise a fetal heart rate monitor for measuring the heart rate of a fetus in vivo. The monitor generates a lag histogram and uses the lag histogram for stabilizing the determination of the fetal heart rate.

System for measuring the period of a quasi-periodic signal

The invention is a physiological monitor for determining a physiological characteristic of a patient. The monitor is particularly adapted to monitor fetal heart rate, and includes a transducer for receiving a signal from the patient that is indicative of the physiological characteristic and for generating an output signal that is representative of the received signal. The monitor further includes a processor coupled to the transducer for receiving the output signal and generating therefrom a physiological signal that is representative of the physiological characteristic. The physiological signal may further be representative of the signal strength of a signal used to calculate the physiological characteristic. The monitor further includes a display unit fixed to the transducer and coupled to the processor for generating a display representative of the physiological signal.

System, with sensor positioning indicator, for monitoring a biological

A signal digitization system and method is disclosed which identifies a plurality of sets of spaced intervals of information; defines a strobing window within each spaced interval in one of the sets at a time; strobes the signal during the strobing window; integrates and holds the strobed signal; and digitizes the integrated signal.

System for signal digitization by spaced interval sampling

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Pelham, NH, United States of America

Jeremy L Muller