Multipath Compensation Techniques
In many of the compensation techniques described in the previous chapter, the addition of stages to the circuit leads to a reduction of the obtainable bandwidth. Going from simple two-stage Miller compensation to Nested Miller compensation with three gain stages, for instance, results in a fifty percent smaller bandwidth. Also Hybrid Nested Miller compensation suffers from this drawback. Although the bandwidth reduction effect is absent in Reversed Nested Miller compensation, the dependency of this compensation technique on the load capacitance makes it fundamentally unsuited for general purpose applications. Therefore we would like to eliminate the bandwidth reduction in Nested and Hybrid Nested Miller compensation, while retaining the high level of robustness inherent to these methods.
KeywordsOutput Stage Input Stage Compensation Technique Bandwidth Reduction Output Transistor
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