Patent ID: 6873487
Filing Date: 2005-03-29
Classification: G11B

Abstract:
1. A servopositioning system for a data recording system, comprising in combination: a) a linear data recording medium, upon at least a portion of which are written at least one amplitude-based servo pattern, and at least one time-based servo pattern, wherein the amplitude-based servo pattern includes servo windows and edges of theservo windows define servo tracks of the amplitude-based servo pattern, and wherein the time-based servo pattern includes a first pulse and a second pulse wherein at least a portion of the first pulse defines a different slant angle than a corresponding portion of the second pulse, the slant angles of the first and second pulses being defined relative to a vertical transverse direction across a width of the medium; and b) circuitry, separately responsive to the amplitude-based servo and time-based servo patterns, for producing respective position error signals from each servo pattern.