Operational amplifier having an adjustable frequency compensation

摘要

An operational amplifier (5) with adjustable frequency compensation comprises a transconductance input stage (2) and an amplifier output stage (3) connected serially together between an input terminal (IN) and an output terminal (OUT) of the operational amplifier. At least one compensation block (6) is connected across the input and the output of said output stage (3), According to the invention, the compensation block (6) comprises a plurality (N) of charge storage elements (CCn) connected in parallel together and in series to a switch block (7) which selectively connects a sub-plurality (N') of said charge storage elements (CCn) across the input and the output of said output stage (3) on the basis of an external signal (SEL) of the amplifier (5). <IMAGE>