A 2GHz mean-square power detector with integrated offset chopper

A 2GHz mean-square power detector with integrated chopper is presented. It typically achieves an offset reduction of 14.8dB compared to un-chopped, untrimmed units and 12dB reduction of the offset variation overtemperature (-40/spl deg/C to +85/spl deg/C) compared to laser-trimmed units. The chip is designed in a 0.35 /spl mu/m BiCMOS process, measures 1.5/spl times/1.5mm/sup 2/ and draws 8mA from a 2.7V supply.