Telecom Lead America: Epson has started shipping samples of voltage controlled crystal oscillators (VCXO) for optical networking and LTE base stations applications.
Epson says te VG-4513CB uses a high-frequency fundamental crystal to achieve output frequencies up to 500 MHz with no spurs and very low phase noise and low jitter.
The company claims that the VG-4513CB comes in small package, 87 percent smaller than existing VCXOs. The size reduction enables dense designs such as multi-channel optical networking equipment and multi-channel MIMO (multiple input multiple output) LTE base stations.
Moreover, Epson’s VG-4513CB VCXO offers output frequencies up to 500 MHz without using a PLL or frequency multiplier. By using a fundamental-mode AT-cut crystal, Epson achieves better reliability, lower power, and lower phase noise than existing 500 MHz VCXO products.
In addition, using a fundamental-mode crystal, Epson’s VG-4513CB achieves very low jitter, 50 fs rms at 491.52 MHz. Unlike PLLs and frequency multipliers, Epson’s fundamental technology does not generate spurs.
Epson’s QMEMS technology enables Epson to improve vibration resistance three-fold over previous products. At a mere 0.6 ppb/g, Epson’s VG-4513CB provides a stable frequency reference for base stations which must be installed in challenging environments, such as near railroad tracks.
“With their compact design, high precision, and high stability, Epson’s new products will contribute to the success of LTE,” said Masayuki Morozumi, executive vice president and chief operating officer of Epson’s Microdevices Operations Division.
