| 摘要 |
A write driver, having a pair of head pins for connection to a write head, includes two push-pull buffer circuits connected respectively between first and second pull-up resistors and the control nodes of first and second upper drive transistors. The buffer circuits selectively charge and discharge the inherent capacitances of the upper drive transistors, thereby accelerating their turn on and turn off without diminishing head swing. Moreover, connecting the buffer circuits between the pull-up resistors and the upper transistors effectively isolates, or buffers, the pull-up resistors from the self-inductance voltages of the write head, reducing glitching in the write-head output signal.
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