Intel Corporation
LOW-POWER AND AREA-EFFICIENT GAIN-BANDWIDTH TRIPLER AMPLIFIER

Abstract:

An active current source load of a fully differential amplifier which is converted into a transconductance (g.sub.m) component also at higher frequency by feed-forwarding input signals to their gates. With signal coupling to gate, unity gain bandwidth (UGB) of the amplifier increases by a factor of two. In addition to this, the signal is coupled to source as well to achieve three-fold UGB enhancement. Thus, the effective trans-conductance is g.sub.mp at dc and becomes g.sub.mp+(g.sub.mn.sub.gate+g.sub.mn.sub.src) at high frequency which triples the UGB when g.sub.mp=g.sub.mn.sub.gate/src.