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=eyjlehbpcnkioje0otu1otyymzasimnhbgwiolsicmvhzcisimnvbnzlcnqixx0%3d&rotate=exif&signature=4c8b05c28518f3a52dd5b0db2eb345a5a13d23ff51f6c843ee18f9a7a3bac044&w=128marakanetz