Patent ID: 6191907
Filing Date: 2001-02-20
Classification: G11B

Abstract:
Head drum for a magnetic tape apparatus, comprising a stationary lower cylinder and a rotating upper cylinder on which at least one write/read head is securely arranged and interacts with a magnetic tape with the exchange of electromagnetic signals, at lease one amplifier being provided which rotates together with the upper cylinder and amplifies the signals coming from the write/read head, a rotating transformer for transferring electrical signals between the stationary lower cylinder and the rotating upper cylinder, storage means for electrical energy arranged on the rotating upper cylinder, the storage means being capable of supplying electrical power to all the electronic components rotating together with the upper cylinder, at leas at times, and a controller securely arranged on the rotating upper cylinder, the controller monitoring the charge state of the storage means and controlling the duration of the energy transfer as a function of the charge state.