ðiːz sˈɜːkɪts mˈeɪ biː kwˈaɪt kˈɑːmplɛks, pɹoʊɡɹˈæməbəl ænd sˈɔftwɛɹˈʌn, ɔːɹ sˈɪmpəl wɪð pɹˌiːdᵻfˈaɪnd lˈɪmɪts.
These circuits may be quite complex, programmable and software-run, or simple with predefined limits.