I have made a signal generator based on DDS and amplified its output to 0-20 V pk-pk. Now I want to prepare the output side. My main concern is short circuit protection to prevent damage to my device. I was thinking about isolating the signal on the device side from the output side.
First choice was a transformer. But it is not applicable because finding a good transformer for such wide frequency and amplitude is not easy. Other option was winding the transformer myself, but I have no experience on transformer winding.
Second choice was a coupling capacitor. Using a coupling capacitor may isolate the signal to "some extent" , but does not seem enough ( AC current passes through it , and also it needs to be of a very large capacitance in lower frequencies that leads to problems as current leakage,... ).
Can anyone give me a suggestion please?