Coded data generation or conversion – Sample and hold – Having variable sampling rate
Patent
1997-02-25
1998-09-08
Young, Brian K.
Coded data generation or conversion
Sample and hold
Having variable sampling rate
348537, H03M 100
Patent
active
058050922
ABSTRACT:
In apparatus that measures the characteristics of the read-out signals from memory media, in the prior art, phase control of the clock signals for synchronized sampling of the measurement apparatus was performed by using the read-out signals. Synchronization discrepancies and inability to perform synchronization were produced due to the quality of the read-out signals. In the invention, a Logical processing part generates selection signals that control the selection of samples with phase information, for performing synchronization, from test signals of a recording part, which records the same signal train as the test signal train written onto the memory medium. By the control of these selection signals, samples with phase information for performing synchronization are selected from the sample train output from an A/D converter through an equalizer; these samples pass through a selection part and a control clock generating part by means of the processing of a feed-back processing part. The samples with phase information are fed back, and correct phase control is performed.
REFERENCES:
patent: 4905085 (1990-02-01), Faulhaber
patent: 5572556 (1996-11-01), Satoh
Timing Recovery in Digital Synchronous Data Receivers -IEEE Trans. Comm. May 1976, No. 5, pp. 516-530.
Timing Recovery in Synchronous Equalized Data Communications -IEEE Trans. Comm. Feb. 1975, No. 2, pp. 269-274.
Timing Recovery for Equalized Partial Response Systems -IEEE Trans. Comm. Dec. 1976, No. 12, pp. 1326-1331.
Hewlett--Packard Company
Young Brian K.
LandOfFree
Apparatus for measuring a memory device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for measuring a memory device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for measuring a memory device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1285990