Arrangement comprising a magnetic write head, and write amplifier with capacitive feed-forward compensation
US5841603A · kind A · utility
26Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1996 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Nov 20, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45071
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A write amplifier comprising four current mirrors which are turned on two at a time by two switchable floating current sources between the input terminals of the current mirrors in order to produce a write current of alternating polarity through the write head. The parasitic capacitances across the write head and/or the parasitic capacitances of the write amplifier at the write terminals are compensated by means of feed-forward capacitors. The high impedance at the terminals of the write head enables the common-mode voltage across the write head to be fixed at any desired voltage value by means of a common-mode circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.