Fast cascaded class AB MOS output stage
AssigneeKoninklijke Philips Electronics N.V.
InventorAlok Govil
Life of this patent
Estimating the term…
Abstract
A set of class AB output stages are cascaded to provide a class AB device circuit which utilizes relatively small transistors, low power, and virtually eliminates crossover distortion. The input may be powered by a voltage or a current source.
Claims12
Apparatus comprising at least a first output stage and a second output stage, said first output stage comprising plural FET devices having gates, said plural FET devices being divided into first and second subsets, FET devices in said first subset being connected at their gates to a first common point, FET devices in said second subset being connected at their gates to a second common point, and all FETs in said second stage being connected at their gates to a single common point.
A method of amplifying a signal through a cascaded output stage comprising the steps of connecting a first set of plural FETs to form a first output stage, connecting a second set of FETs to form a second output stage, connecting said first output stage to said second output stage at least two points, and connecting all gates of said second set of FETs to a common point.
Dependencies are inferred from the claim text.