Amplitude adjustable oscillator based on AD9850
Shuai Cui · International Electronic Elements · 2008
This paper presents a sinusoidal signal generator,which the signal,frequency,phase and amplitude are adjustable,based on DDS(Direct Digital Frequency Synthesis).The sinusoidal signal generator which adopts MCU AT89S52 is used for controller,the controllability of sinusoidal signal amplitude is adjusted by the union of digital-to-analog transformer TLC5615 and multiplier AD534.The system sinusoidal signal frequency is between 50Hz and 3 kHz,step frequency is 50Hz.It can be applied to the alternating magnetic measuring instrument,and frequency vibrator in testing instrument or engineering design.