首页>
外国专利>
Method and circuitry for programmably controlling degauss write current decay in hard disk drives
Method and circuitry for programmably controlling degauss write current decay in hard disk drives
展开▼
机译:用于可编程控制硬盘驱动器中的消磁写入电流衰减的方法和电路
展开▼
页面导航
摘要
著录项
相似文献
摘要
A control circuit to provide a control current to control an amplitude of a write current in a magnetic media drive. The control circuit has an output circuit for providing the control current with an amplitude dependent on a bias voltage. A bias current path provides the bias voltage to the output circuit, and a current diverting circuit is connected to divert current from the bias current path. A programmable ramp voltage generator operates in response to a degauss enable signal, and a voltage-to-current converter receives the programmable ramp voltage to control the current diverting circuit to divert current from the bias current path at a rate determined by the programmable ramp voltage. The bias voltage and the write current decay according to the programmable ramp voltage. The write current decay can be made linear and independent of a beginning write current amplitude.
展开▼