Design of Simplified Signal Generator and DC Power Integrated System

With the purpose to improve the use convenience of electronic measuring system instruments, we design a simplified signal generator and DC power integrated system by taking AT89C52 Single Chip Microcomputer as the core and combined with Programmable Gain Amplifier Technology, LCD Technology, Filter Technology, Regulator Technology and V-I Technology. As the test, the output sine-wave frequency from the system is 1Hz~30Hz with the amplitude 1~5V and output error not more than 63Hz; the output DC voltage is 1.25V~3.7V with the output error not more than 0.3V; the output DC current is 4mA~20mA with the output error not more than 0.8mA, presenting the system meets the normal demand of electronic measurement.