摘要:
A magnetic tape servo pattern with different frequency signals to define the frame boundary. A significantly different frequency field is used to signal the transition from one frame to the next.
摘要:
A magnetic tape servo pattern including track identification. Information from a track identification area intersecting one or more tracks on each frame in combination with information identifying the track as odd or even, is used to uniquely identify the track.
摘要:
An apparatus for slew rate control using a plurality of discrete slew rate levels. The apparatus includes a load switch and a switch controller. The load switch outputs a load voltage to a load. The switch controller generates a switch control signal in response to an enable signal. The switch control signal controls operation of the load switch. The switch controller controls a slew rate of the load switch according to a plurality of discrete slew rate levels.
摘要:
A servo stripe pattern for determining the longitudinal position of the tape with respect to the tape head. A data field on each frame of the servo pattern includes a digital one or a zero. An adjacent series of data fields are arranged in a predetermined sequence defining synchronization and position count fields. The position count field allows the tape controller to accurately determine where, along the length of the tape, the tape head is currently positioned.
摘要:
A method for detecting a frame edge in a servo stripe on a length of magnetic tape. The method includes converting an analog signal to a digital signal and detecting a change in digital signal frequency at a frame edge. A detection signal is generated in response to the detected frequency change.
摘要:
A method for determining the longitudinal position of a length of magnetic tape with respect to the tape head. A data field on each frame of the servo stripe includes a digital one or a zero. An adjacent series of data fields are arranged in a predetermined sequence defining synchronization and position count fields. Identifying the position count field allows the tape controller to accurately determine where, along the length of the tape, the tape head is currently positioned.
摘要:
An apparatus for slew rate control using a plurality of discrete slew rate levels. The apparatus includes a load switch and a switch controller. The load switch outputs a load voltage to a load. The switch controller generates a switch control signal in response to an enable signal. The switch control signal controls operation of the load switch. The switch controller controls a slew rate of the load switch according to a plurality of discrete slew rate levels.
摘要:
A method for writing a servo pattern onto a length of magnetic tape includes writing a first frequency signal onto a first portion along the length of the tape, and writing a second frequency signal by simultaneously writing a plurality of spaced apart predetermined shapes. The predetermined spaced apart shapes are achieved by writing the second frequency using a writer having a split top pole. Passing the tape over the spaced apart top pole elements allows the writer to simultaneously write the plurality of spaced apart shapes. The tape can then be passed over a read module.
摘要:
A thin film magnetic tape head including a split top pole. The split top pole configuration allows multiple patterns to be written simultaneously onto a servo band.
摘要:
A method for identifyng a servo track. Information from the servo track about the odd or even number of the track is combined with information about the presence or absence of a track identification area to identify the track number.