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High stability SAW oscillator

Epson Toyocom Corporation, a specialist in crystal devices, has announced that it used its technology to achieve the 'world's first' SAW resonator with a frequency/temperature coefficient that is represented by a cubic curve.

This resonator is used in the newly developed EG-4101/4121CA, a high frequency, low jitter and low phase noise SAW oscillator, said to provide outstanding frequency stability over a wide temperature range.

Samples will become available in December 2009, and commercialisation is planned for March 2010.

In recent years the amount of heat generated within electronic equipment has increased, not only because of the higher reference clock frequencies needed to support faster transmission speeds, but also because of the diminishing size of equipment enclosures, as epitomised by blade servers. Higher internal temperatures are giving rise to heightened need for electronic devices that operate over larger temperature ranges and at higher stability. Also needed are electronic devices that provide stable operation for extended periods in environments subject to hot and cold temperature extremes, such as outdoor wireless base stations.

To respond to these market trends, Epson Toyocom leveraged its original SAW design approach to develop a SAW oscillator for LAN and SAN equipment with high speed interfaces. The new EG-4101/4121CA offers an improved frequency/temperature coefficient as what Epson Toyocom describes as 'the world's first SAW oscillator to have a frequency/temperature coefficient that is represented by a cubic curve'.

This means that, when operated at a high frequency (100 to 700MHz) fundamental mode, this SAW oscillator exhibits low jitter and low phase noise and, moreover, has a frequency/temperature coefficient that is equivalent to an AT oscillator having good stability.

The EG-4101/4121CA will help further increase system reliability and quality in server/network devices and wireless communications applications that require a highly stable, high frequency clock (low jitter and low phase noise) that operates over a wide temperature range.

Using this newly developed technology as a key technology, Epson Toyocom plans to expand and enhance its line up of SAW oscillators to meet demand in a wide range of areas.

Author
Chris Shaw

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