High density integrated circuit with high output impedance

摘要

A circuit apparatus suitable for use as a basic building block of very small geometry integrated circuits (on the order of 1 micron and smaller) comprising (i) a current mirror circuit with a cascode output, comprising a first transistor and a second transistor connected in series, the first transistor coupled between a ground and the second transistor, and (ii) a single stage gain loop comprising a transresistance amplifier coupled between a control input of the second transistor and the series connection of the first and second transistors, wherein the circuit apparatus provides an output with high impedance output and with maximum swing capability.