US 8,027,114 B1 · Spiral servo detection with phase-locked loop (PLL)

Abstract

The present disclosure includes apparatus, systems and techniques relating to detecting sync marks. In some implementations, an apparatus includes phase locking circuitry that includes a phase calculator to identify a phase of sampled data, and a phase-locked loop to generate an output signal and phase-lock the generated output signal with the calculated phase of the sampled data to produce a phase-locked signal. The apparatus includes detector circuitry to receive phase information of the phase-locked output signal. The detector circuitry includes a detector to generate a stream of decision bits for the sampled data with each bit in the stream being associated with a different phase. The detector circuitry includes an output selector to select at least one bit from the stream based on the received phase information of the phase-locked output signal.

Claims20

Dependent claims

An apparatus comprising:

phase locking circuitry comprising
a phase calculator to identify a phase of a sampled data, and
a phase-locked loop to generate an output signal and phase-lock the generated output signal with the identified phase of the sampled data to produce a phase-locked output signal;
and
detector circuitry to receive the sampled data and communicate with the phase locking circuitry to obtain phase information of the phase-locked output signal, comprising
a detector to generate a stream of decision bits for the received sampled data, wherein each bit in the stream is associated with a different phase, and
an output selector to select at least one bit from the stream based on the received phase information of the phase-locked output signal.

4 more elements

Dependencies are inferred from the claim text.

Spiral servo detection with phase-locked loop (PLL)

Life of this patent

Spiral servo detection with phase-locked loop (PLL)

Life of this patent

Abstract

Claims20