Adjustable Frequency and Amplitude Wave Generator

Abstract

In this paper the design of the waveform generator is introduced, and its frequency and amplitude is adjustable. Using the most commonly used 89C51 microcontroller, AD conversion chip ADC0809 and DDS chip AD9850, the generator can produce more accurate wave signal, and can realize the analog regulator of the frequency and amplitude.

Design and Implementation of a High-frequency Signal Generator using the DDS Mixing Principle

“…The frequency control character with 32 bit can realize the output frequency accuracy of 0.029Hz when the input reference frequency of 125MHz [8] o f is the output basic wave frequency. Thus, it is possible for the applications that the AD9850 could be used for design and develop the signal generator to capture and collect the data [9][10][11]. When the voltage is 5V, the maximum input reference frequency of this chip is 125MHz.…”