Circuit system

摘要

In one aspect, a circuit system includes a logic circuit and a bias circuit. The logic circuit includes one or more current mode logic gates each of which is operable to steer a respective tail current to produce an output voltage swing. The bias circuit is operable to maintain the voltage swing of each current mode logic gate independent of changes in tail current level. In another aspect, the circuit system includes a switching speed reference circuit that is operable to detect intrinsic switching speeds of the one or more current mode logic gates. In another aspect, the circuit system includes a tail current adjustment circuit that is operable to dynamically adjust the current mode logic gate tail currents to maintain logic gate switching speed in correlation with a reference clock frequency.