Integrated micro power frequency breath detector

The presented system is energy efficient, consumes approx. 50 μA and operates over a wide range of supply voltages, 1.8 ÷ 18 V DC. It enables to detect even very weak breathing. The concept of the integrated system has also been presented. This system can work directly with digital circuits without converting the electric signal. The presented system is characterized by a very simple construction and offers a new solution both in the field of sensor technology and for the use of operational amplifiers.