HIGH SPEED AMPLIFIER

摘要

For high speed amplifiers, the parasitic capacitances between a differential input pair (INP, INM) and a cascoded bias network can introduce a pole that can affect performance. Here, a feedforward network with an amplifier (200) compensates for this pole by introducing a zero that effectively cancels the pole, moving the next parasitic without any additional power.. This is accomplished using a pair of feedforward capacitors (CFFl, CFF2) coupled across transistors (Q3, Q8) of the cascoded bias network, which reduces power consumption.