Phono preamp design


i was always curious how the phono preamps are designed: how many amplification stages, feedback... is there any phono preamps with no neg.feedback or its presence is mandatory in this case?
Convert?fit=crop&h=128&policy=eyjlehbpcnkioje1mdewodkymdgsimnhbgwiolsicmvhzcisimnvbnzlcnqixx0%3d&rotate=exif&signature=b525b2b324318d125e403617f458159f866a8f61e34a77bb2d54df37d5486ca6&w=128marakanetz