Programmable Signal Generator

U sklopu ovog rada projektiran je i izveden generator signala. Za izvedbu je korišten postojeći ugradbeni računalni sustav temeljen na ARM Cortex M4 mikroprocesoru. Generator sadrži strujni i naponski izlaz. Na strujnom izlazu može se generirati proizvoljan valni oblik amplitude podesive od 0 do 24 mA s rezolucijom 10 μA. Na naponskom izlazu može se generirati sinusni valni oblik amplitude od 0 do 800 mVRMS s rezolucijom 1 mVRMS te mogućnošću namještanja frekvencije od 1 do 10 kHz s rezolucijom 10 Hz. Za generiranje signala koristi se PWM radne frekvencije 100 kHz. Također je dizajniran izlazni nisko propusni filtar granične frekvencije 10 kHz i gušenja najmanje 40 dB/dekadi. Ispitana je funkcionalnost generatora signala.As part of this master's thesis, a signal generator was designed and built. For the performance was used an existing embedded computer system based on the ARM Cortex M4 microprocessor. The generator contains current and voltage output. An arbitrary waveform of amplitude adjustable from 0 to 24 mA with a resolution of 10 μA can be generated at the current output. A sine waveform of amplitude from 0 to 800 mVRMS with a resolution of 1 mVRMS and the possibility of adjusting the frequency from 1 to 10 kHz with a resolution of 10 Hz can be generated at the voltage output. A PWM with an operating frequency of 100 kHz is used to generate the signal. An output low-pass filter with a cut-off frequency of 10 kHz and attenuation of at least 40 dB/decade is also designed