A 3.3V low-jitter frequency synthesizer applied to fast Ethernet transceiver
A frequency synthesizer applied to 10/100 Base-T Ethernet transceiver is described. It can work in 10Mbps or 100Mbps mode adaptively and convert from one mode to another freely. The circuit can meet both requirements of transmitter on rising/falling time and receiver on CDR so that the additional power and area are saved. Under some testing circumstance, G of voltage control oscillator jittercycle
