Adaptable performance MOS current mode logic for use in a 3GHz programmable frequency divider

An adaptable MOS current mode logic (AMCML) family is described. The AMCML circuits enable the drive current and voltage swing of the logic gates to be adaptively controlled, enabling real-time adaptation to achieve an optimum balance between power, speed, and robustness. A programmable frequency divider implemented using AMCML and capable of operating at input frequencies up to 3GHz is described. The divider was implemented in a TSMC 0.18/spl mu/m CMOS process and requires less than 3mA of current for operation at 3GHz from a 1.8V supply.