A Device for Measuring of Frequency Response Function of Biopotentials

The article proposes a device for measuring of frequency response function of biopotentials of electrocardiographic, electroencephalographic, myographic studies to monitor the functional state of the patient and diagnose the pathologies of his health. The device for measuring biopotentials contains: serially connected biopotential sensors (medical probes), amplifiers, an analog-to-digital converter, and a microcontroller, which outputs are connected by a bidirectional bus with a personal computer, a block of noise suppression in the form of an operational amplifier with negative feedback as well as common-mode interference suppression, noise, and bias level correction schemes. The device is based on a specialized signal processing algorithm. In this case, the signals are received from biopotential sensors and the results are transmitted to a personal computer for further processing, storage and transmission. Thus, the device provides processing and transmission of biopotentials with the suppression of common mode interference. The development object provides an expansion of the scope of biopotential measurement devices, improving the quality of medical services provided, creating a new research tool.