Optical disk pickup system using current division signal transmission and methods and optical disk systems using the same
US6418110B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2000 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Oct 31, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk pickup system 400 using current mode signal transmission is disclosed. An operational amplifier 404 has an input for receiving an electrical signal and a feedback loop including a current path of a first transistor 405 of a first size, transistor 405 having a control terminal at a preselected voltage. A conductor 402 is coupled to an output of operational amplifier 404 for transmitting the electrical signal as a current. A second transistor 406 of a second size has a current path in series with a conductor 402 and a control terminal coupled to the preselected voltage, transistors 405, 406 forming a current divider.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.