The paper deals with theoretical and technical aspects of construction of laboratory AC/DC amplifier. The work includes project, theoretical analysis, computer simulations and testing of prototype power amplifier. The block diagram of prototype device is shown in Fig. 3. The amplifier converts the DC component with value 12 V or 24 V and AC component (voltage disturbing signal). The amplifier consists of two sections and each section contains two component amplifier units working in the parallel structure. Developed device will be used in the laboratory stand for immunity testing of vehicle on-board electronic devices against selected conducted disturbances. The results of theoretical analysis are discussed in the chapter 3. The amplifier is characterized by good metrology parameters and has wide frequency range (Fig. 11 and Fig. 12). The test results of prototype amplifier are presented in the chapter 5.
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