Synchronous signal generator using a crystal oscillator and filter
US7259636B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 2002 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Jan 7, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/009
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A synchronous signal generator according to the present invention outputs a pulse with low jitter by setting the sine wave output of a crystal oscillator close to an ideal sine wave, and converting it into a pulse signal. By passing the sine wave output from the crystal oscillator of an oscillation frequency f through a filter unit having an equal center frequency f0, inputting output of a filter unit into a pulse converter, and converting the result into a pulse of a rectangular waveform, thereby obtaining an output signal. By configuring the filter unit by the crystal filter and setting it equal to the crystal oscillator in frequency-temperature characteristic, an output signal can be obtained with low jitter although the temperature changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.