DIGITAL GENERATION SYSTEM FOR ANALOG SIGNALS

Abstract

Abstract. The generator is an important link in many electronic devices, whether it is test, laboratory equipment, medical or radio-electronic systems. In addition to technical characteristics, parameters such as ease of use, compactness and low cost of generators remain important for the user. Therefore, the prerequisite for further work was the study and evaluation of the characteristics of the existing systems for the digital generation of analog signals. The carried out research allowed to consider in detail the methods of creating analog signals, tools for their implementation, principles of operation, their strengths and weaknesses. Unfortunately, the devices offered by most manufacturers are expensive. A large number of integrated circuits are produced that allow you to generate signals of various shapes. These chips differ in the way the signals are synthesized [3] and in their specifications. According to the method of signal synthesis, they are divided into direct analog synthesizers, indirect synthesizers based on phase autotuning, direct digital synthesizers, and hybrid synthesizers. Currently, the most popular are synthesizers based on direct digital synthesis due to the advantages associated with high frequency resolution, high signal quality, digital control, low cost, small cabinet size, and power consumption. Based on the analysis, improvements were proposed. For this purpose, a structural diagram of the system has been developed, new blocks were described, their role and mechanism of action, and relevant electronic components were selected. The choice of main components, which are STM32 microcontrollers with Cortex-M4F core from STMicroelectronics and digital synthesizer AD9850 from Analog Devices, Inc., was justified. As a result, a system for the digital generation of analog signals was designed.