Patent ID: 6590448
Filing Date: 2003-07-08
Classification: H03F,H04R,Y10S

Abstract:
A method for providing an operational amplifier having readily configurable input and output characteristics, said method comprising the steps of:connecting in parallel a plurality N of op amp cells, each of said N op amp cells having an input gm stage, an output gm stage and an internal node thereinbetween, wherein said connecting step comprises directly connecting at least one of said internal nodes of said N op amp cells to at least one other of said internal nodes of said N op amp cells without the use of a summing resistor configured at an output of each said input gm stage; summing a current output of at least one of said input gm stages of said N op amp cells with at least one other of said input gm stages of said N op amp cells; and providing said summed current output to at least one of said output gm stages of said N op amp cells, such that saturation due to mismatches between said N op amp cells is eliminated.