HIGH SPEED AMPLIFIER INCORPORATING PRE-EMPHASIS

摘要

An amplifier circuit for receiving an input signal and providing an output signal, comprises a main chain of logic stages with a plurality of nodes therebetween, and at least one auxiliary chain nested between one node in the main chain and another node, which is not the next node, to form a series of feed back or feed forward nested equalisation loops; whereby the input signal is fed serially down the main chain and is also fed through the said at least one auxiliary chain and summed to provide the output signal. The invention overcomes gain-bandwidth limits of the drive stages and bandwidth reductions that occur when analogue stages operating in a linear mode are concatenated.