Circuit, disk controller and method for calibrating a high precision delay of an input signal
US6445661B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1999 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Aug 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2005/00078
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a circuit to provide a high precision delay signal, an oscillator generates oscillator pulses, each with an oscillator period. A counter, in response to an enable signal, counts the oscillator pulses and outputs a count signal. The enable signal is a reference clock signal having a reference-clock period that is greater than the oscillator period. A delay generator delays an input signal to provide a sequence of incrementally delayed delay-signals. A multiplexor, in response to the count signal, selects one of the delayed signals. In another aspect of the invention, a disc controller uses the circuit to provide a high precision delay to a write data signal. Another aspect of the invention provides a method of providing the high precision delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.