Common-gate pre-driver for disc drive write circuit
US5757215A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1997 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Mar 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0026
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus conducts current through a two terminal inductive load. The apparatus has a first conduction path, from a first supply voltage to one terminal of the inductive load and a second conduction path from the second terminal of the inductive load to a second supply voltage. The first conduction path includes a switching device that is controlled by a field-effect transistor having a gate terminal, second terminal, and third terminal. The gate terminal of the field-effect transistor is coupled to a reference voltage. The voltage at the second terminal of the field-effect transistor increases when the voltage at the field-effect transistor's third terminal increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.