A new multipath amplifier design technique for enhancing gain without sacrificing bandwidth

A new multistage multipath amplifier design technique is introduced that combines the formerly distinct phases of stage design and compensation. The result is an inherently stable n-stage amplifier whose gain-bandwidth product is not compromised as the number of stages is increased. The technique relies upon (n 1) systematic pole-zero cancellations to achieve a near first-order open-loop system transfer function. The resultant amplifier architectures are attractive for realization in low-voltage processes because they accumulate gain using horizontal techniques (cascading) rather than vertical techniques (device stacking).