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:
Dec. 30, 2014
Filed:
Oct. 30, 2013
Quantum Corporation, San Jose, CA (US);
James P. Peng, Santa Maria, CA (US);
Jaewook Lee, Irvine, CA (US);
Jerry Hodges, Riverside, CA (US);
Turguy Goker, Solana Beach, CA (US);
Quantum Corporation, San Jose, CA (US);
Abstract
A method for inhibiting cycle slip in a tape drive having at least three channels that each utilizes a corresponding numerically controlled oscillator includes establishing a reference clock that is based on an output of the numerically controlled oscillators for at least two of the channels, comparing the output of the numerically controlled oscillator for one of the three channels with the reference clock to determine a first channel phase delta value for the one channel, and generating an error signal for the one channel if the channel phase delta value exceeds a threshold phase delta value for the one channel. The method may also include applying an inhibition loop filter to the error signal for the one channel if the first channel phase delta value exceeds the threshold phase delta value, adjusting a gain of the inhibition loop filter based at least partially upon one of the first channel phase delta value and the threshold phase delta value, and/or feeding back the error signal to the numerically controlled oscillator of the one channel.