Current driver circuit for supplying write current to a write head while changing a flow direction of the write current
US6683487B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2002 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Aug 7, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/6872
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An H-type bridge circuit includes four transistors, two resistors, and a write head. A write current supplied from a current supply circuit including a first of the transistors and resistors flows through the write head and is received in a current receiving circuit including a second of the resistors and a fourth of the transistors, and another write current supplied from a current supply circuit including the second of the transistors and the second resistor flows through the write head and is received in a current receiving circuit including the first of the resistors and the third of the transistors. Impedance of the write head matches an output impedance of the current supply circuit and matches an input impedance of the current receiving circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.