The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2001
Filed:
Feb. 08, 1999
Robert Andrew Kertis, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
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.