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:
Mar. 09, 2010
Filed:
Feb. 28, 2008
Rajkumar Jayaraman, Plano, TX (US);
Taras Dudar, Plano, TX (US);
Seungwoo Jung, Dallas, TX (US);
Ashish Manjrekar, Dallas, TX (US);
Rajkumar Jayaraman, Plano, TX (US);
Taras Dudar, Plano, TX (US);
Seungwoo Jung, Dallas, TX (US);
Ashish Manjrekar, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Methods and apparatus for proximity detection of hard disk drive read heads are disclosed. A disclosed method comprises forming a first signal having a frequency, a first amplitude, and a first offset voltage, forming a second offset voltage substantially equal to the first offset voltage from the first signal, amplifying the amplitude of the first signal to cause the resonant signal to have a second amplitude greater than the first, and forming a second signal having a frequency indicative of the location of a read head relative to a platter of a hard disk drive.