V supply-voltage Voltage Controlled SAW Oscillator and its PLL application

Abstract

A B S m C TWe have developed the low supply volfuge Voltage Controlled SAW Oscdlator(VCS0) for high-speed optical communicahon equipment A one-port quartz SAW resonator is used to minimize the temperature drifl. We use a varactor and a serial inductor to get the wide p u h g fiequency range. The total kequency stability less than 2 looppm is achieved, and the p u h g fiequency range is greater than I25Oppm Its volume is 8.5mm hgh, 31mm wide, and 28mm long.We also developed the PLL module using ths VCSO, T~I S module generates the 155.52MHz sme wave signal which is synchronized to the input 19.44MHz signal. The custom PLL LSI is used to achieved the small size and low power consumphon. The pull in range is greater than +-100ppm. Its volume is SSmm high, 41mm wide and long. The Figure 1 shows the external kiew of the VCSO and the PLL module.The miniature coaxial connector is used for the oscdlator output, and small pin-terminals are used for the other connection.