| 摘要 |
<p>As depicted in the Figure, a resonant frequency control circuit (18) communicates with a head (14) of a disk drive and a read/write channel (22). The resonant frequency control circuit (18) is useful in achieving peaking of a readback signal generated by reading data from a magnetic disk (10). The read/write channel (22) includes an equalizer circuit for enhancing equalization of the readback signal. A controller (76) communicates with the read/write channel (22) and the resonant frequency control circuit (18) for, in one embodiment, selectively adding capacitance to that capacitance which is present in the read element (16) of the head (14). By controlling the resonant frequency, this desired signal peaking can be achieved, which is related to the frequencies of the coded data on the disk (10).</p> |
