Open head detection circuit and method in a voltage or...

Details Open head detection circuit and method in a voltage or... Open head detection circuit and method in a voltage or...

2005-10-04

2005-10-04

Faber, Alan T. (Department: 2651)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S068000

Reexamination Certificate

active

06952316

ABSTRACT:
An open write head detection circuit is provided comprising a write head driver circuit, a programmable reference voltage source, a comparator and a pulse width filter. The write head driver circuit generates an voltage sense signal. The comparator compares the voltage sense signal with a reference voltage from the programmable reference voltage source and generates a comparator output signal indicative of whether the voltage sense signal is greater than or less than the reference voltage. The comparator output signal is input to the pulse width filter which generates a latched open head signal in response the voltage sense signal being less than the reference level for a predetermined time measured as a programmable number of write clock cycles.

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patent: 60136910 (1985-07-01), None

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