Integrated analog switch matrix with large input signal and 46 dB isolation at 1 GHz

摘要

A complete integrated analog switch matrix allowing a large input signal and amplitude, and demonstrating outstanding performances, namely, a 46 dB feedthrough on channel at 1 GHz and a 9.5 /spl Omega/ switch resistance in the ON state (R/sub ON/), was developed and fabricated in a standard 1 /spl mu/m QED/A TriQuint GaAs process. The main advancement of this new concept is that the drive signal opening the switch tracks the input signal with an added positive offset. This constant positive offset results in a very low R/sub ON/, while keeping the switch dimensions and power dissipation acceptably small. This new concept has allowed a monolithic integration of the switches with their drive circuitry and control logic into the 13/spl times/13/spl times/2 analog switch matrix, which is a unique solution.