Method and apparatus for operating a time-continuous filter of a read - / write channel for a hard disk drive

摘要

A method and apparatus for operating a continous time filter (CTF)(128) of a read/write channel (108) for a hard disk drive (100). The apparatus includes an input muliplexer (220) that receives an analog signal (215) and transmits the analog signal (215) to a read filter (254) when the CTF (128) is in read mode and to a servo filer circuit (256) when the CTF (128) is in servo mode. The apparatus also includes an output multiplexer (222) that receives a read filter output signal (225) from the read filter circuit (254) when the CTF (128) is in read mode and a servo filter output signal (227) from the servo filter circuit (256) when the CTF (128) is in servo mode. The method includes receiving the analog signal (215) by the input miltiplexer (220) and routing the analog signal (215) to the read filter circuit (254) when the CTF (128) is in read mode and routing the analog signal (215) to the servo filter circuit (256) when the CTF (128) is in servo mode.