发明名称 |
Disk drive write driver with boosting circuit to improve output voltage swing |
摘要 |
A write driver driving a write current through a head connected to the write head by an interconnect. The write driver includes a circuit matching output resistance to the odd characteristic impedance of the interconnect and a voltage boosting circuit. The voltage boosting circuit in connected between a high voltage reference or supply voltage and a low voltage reference, and includes a current source, such as a MOS transistor, connected to the input node of a capacitor. During the overshoot duration, the current source operates at saturation to generate a pulsed current with an amplitude of half the load current. The circuit includes another transistor in series with the current generator between the capacitor and the driver output. A forward bias diode is connected between the capacitor output node and high voltage reference and enters reverse bias during overshoot duration swinging the driver output voltage above supply voltage.
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申请公布号 |
US2005254159(A1) |
申请公布日期 |
2005.11.17 |
申请号 |
US20040843823 |
申请日期 |
2004.05.12 |
申请人 |
VENCA ALESSANDRO;ALINI ROBERTO;POSAT BARIS |
发明人 |
VENCA ALESSANDRO;ALINI ROBERTO;POSAT BARIS |
分类号 |
G11B5/09;G05F3/26;G11B5/00;G11B5/02;H02M3/07;(IPC1-7):G11B5/02 |
主分类号 |
G11B5/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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