Nios II-Based Audio-Controlled Digital Oscillograph
نویسنده
چکیده
With these issues in mind, we designed an audio-controlled digital oscillograph that uses an audio recognition algorithm to control the oscillograph; specifically, it controls the waveform display size attenuation and amplification as well as the scanning speed. The oscillograph display uses a standard VGA interface that can display waveforms on a PC monitor, projector, or other standard output device. Additionally, the system leverages the advantage of FPGAs for digital signal processing (DSP) and hence, for computing the period, valid value, and average value for the input signal and fast Fourier transform (FFT) algorithm-based frequency spectrum analysis.
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