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=eyjlehbpcnkioje1mdg2nje5njisimnhbgwiolsicmvhzcisimnvbnzlcnqixx0%3d&rotate=exif&signature=09e7b65a7133848a4c324c8933b547648b771a73f0720c297d45991403a7a77f&w=128marakanetz