Small packaged VCSO for 10[Gbit] Ethernet application

The information communication infrastructure has increased the need for broadband. In order to meet this need, products for 10 Gbit Ethernet applications have been introduced to the market. The proliferation of Ethernet service, which offers lower cost and wider bandwidth in comparison with a leased line, enabled enormous amounts of high-speed data. However, such data transfers, with large capacity and high speed, demands tight specifications for the oscillator used as a frequency generator. As a solution for those demands, we built a small packaged, 7×5 mm, 622.08 MHz VCSO (voltage controlled SAW oscillator) with a SAW (surface acoustic wave) resonator using high density surface mount technology. Then, we confirm that our VCSO could offer the same level of good linearity, wide pull range, and excellent frequency short-term stability as a VCXO, and that it can be of practical use.