Patent ID: 8488264
Filing Date: 2013-07-16
Classification: G11B

Abstract:
1. A signal processing circuit which processes a signal read from a magnetic disk comprising a servo region and a user data region, the servo region comprising a servo address mark, the user data region comprising a data sector, the circuit comprising: a counter configured to count a servo clock when having detected the servo address mark based on the signal read from the magnetic disk and to output a first detection pulse in synchronization with the servo clock when having detected a first value; a gate controller configured to generate a pulse for locating the data sector in synchronization with a data clock which is not in synchronization with the servo clock when the counter outputs the first detection pulse; and a gate clock generator configured to generate a gate clock in synchronization with the data clock, wherein the gate clock generator is configured to stop generating the gate clock when the counter counts a second value smaller than the first value and to resume generating the gate clock when the counter counts the first value.