Efficient analog front end for a read/write channel of a hard disk drive running from a highly regulated power supply

US6661590B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Sasan Cyrusian · Scotts Valley, US
• Stephen James Franck · Felton, US
• Sriharsha Annadore · Sunnyvale, US
• Elmar Bach · Villach, AT
• Siegfried Hart · Santa Cruz, US
• Thomas Blon · Munich, DE
• William G. Bliss · Thornton, US
• James W. Rae · Rochester, US
• Michael A. Ruegg · Santa Cruz, US
• Ulrich Huewels · Starnberg, DE
• Fritz Mistlberger · Moosburg an der Isar, DE

Key dates

• Filing date: May 25, 2001
• Grant date: Dec 9, 2003
• Expiry date: Nov 11, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B20/10009
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A method and apparatus for running an analog portion (162) of a read/write channel (108) from a highly regulated power supply (260). The apparatus includes an analog portion (162), a clock synthesizer (154), and a highly regulated power supply (260) connected to the analog portion (162) and the clock synthesizer (154). The analog portion (162) and the clock synthesizer (154) both comprise high voltage transistors which operate in a first voltage range and low voltage transistors which operate in a second voltage range, wherein the first voltage range is within the second voltage range. The highly regulated power supply (260) supplies power that is within the first voltage range to the analog portion (162) and the clock synthesizer (154). The method includes generating power that is within the first voltage range using the highly regulated power supply (260), and supplying the power to the analog portion (162) and the clock synthesizer (154).