Abstract: A measuring system for measuring at a plurality of sampling points, a signal representative of the instantaneous value of a physical parameter, wherein a signal representative of the instantaneous value of the physical parameter being measured is utilized as a reference signal against which the next following signal is compared and so on. The system includes means for passing to an output, signals similar to, or within a predetermined limit of, the immediately preceding signals. A particular application of this measuring system is in the measurement of the temperature of living bodies wherein the changes in temperature are transmitted via a pulse width modulation telemetry system to a receiver incorporating the measuring system. By means of continually up-dating the reference signal it is possible to reject any signal which due to some reason such as radio interference is unacceptable because it varies too much from the previous reading.

Abstract: A measuring system in which a signal representative of the instantaneous value of a physical parameter being measured is utilized as a reference signal against which the next following signal is compared and so on. The system includes means for passing to an output, signals similar to, or within a predetermined limit of, the immediately preceding signals. A particular application of this measuring system is in the measurement of the temperature of living bodies wherein the changes in temperature are transmitted via a pulse width modulation telemetry system to a receiver incorporating the measuring system. By means of continually up-dating the reference signal it is possible to reject any signal which due to some reason such as radio interference is unacceptable because it varies too much from the previous reading.