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US 6,714,603 B2Granted
Asynchronous timing for interpolated timing recovery
AssigneeInfineon Technologies North America Corp.
InventorsJonathan Ashley, Matthias Driller
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AssigneeInfineon Technologies North America Corp.
InventorsJonathan Ashley, Matthias Driller
Estimating the term…
A quotient (y2−y0)/(y3−y1) is generated by circuitry where Yk are asynchronous samples from a sequence of asynchronous samples, the quotient (y2−y0)/(y3−y1) is compared to a plurality of predetermined fractions with a comparator, and an initial interpolation interval value (μ0) stored in a lookup table is selected by circuitry based on the comparison of the quotient to the plurality of predetermined fractions. The predetermined fractions can represent boundary points and the quotient can fall between an interval defined by two of the boundary points. The selected initial interpolation value (μ0) can be the average of two calculated values of (μ) using values of two predetermined fractions associated with the two boundary points between which the quotient falls.
A zero phase restart unit for determining an initial interpolation interval (μ0) for digitally resampling a stream of asynchronous samples of an analog signal, the initial interpolation interval (μ0) providing a time interval after an asynchronous sample at which a synchronous sample is interpolated, the zero phase restart circuit comprising:
An interpolated timing recovery unit for digitally resampling a stream of asynchronous samples of an analog signal, the interpolated timing recovery unit comprising:
A sampled amplitude read channel, comprising:
Dependencies are inferred from the claim text.