Pipelined demodulation and ADC conversion scheme for disk drive servo system
US5583713A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1994 |
| Grant date | Dec 10, 1996 |
| Priority date | — |
| Expiry date | Jul 22, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG16H50/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A servo system for controlling the position of a read/write head in a disk drive is provided. The servo system includes an input terminal for sequentially receiving a plurality of input signal bursts of a burst pattern, wherein the input signal bursts include positional information of the head. Demodulation circuitry, coupled to the input terminal, sequentially demodulates each input signal burst and provides a demodulated signal for each burst. An ADC, coupled to the demodulation circuitry, sequentially converts each demodulated signal. The ADC converts a first demodulated signal corresponding to the first of the plurality of input signal bursts before the demodulation circuitry completes demodulating the next of the plurality of input signal bursts. In a preferred embodiment, the ADC converts a demodulated signal corresponding to a first input signal burst while the demodulation circuitry demodulates a signal corresponding to a second, and subsequent, input signal burst. Thus, a pipelined demodulation and conversion scheme is disclosed in which time delays between demodulation and conversion are reduced. In the preferred embodiment, the demodulation circuitry includes area detect…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.