Method and circuits for high speed powerup of analog reference source for a direct access storage device (DASD)
US6239933A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Feb 8, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/04123
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and circuits are provided for high speed powerup of an analog reference source, such as used in a direct access storage device (DASD). The high speed powerup circuits for the analog reference source include a biasing current source. Biasing circuitry is provided for establishing a first bias reference voltage level. An enable input is provided for disabling and for enabling powerup of the analog reference source. A transistor switch is coupled between the bias reference voltage level and the analog reference source. The transistor switch is operatively controlled by the enable input for driving the analog reference source and enabling fast powerup of the analog reference source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.