A 50GS/s Distributed T/H Amplifier in 0.18μm SiGe BiCMOS

Abstract

A 3-stage distributed T/H amplifier (DTHA) is presented for high-bit-rate optical receivers and millimeter-wave radios. Distributed topology enhances the bandwidth of the DTHA to >42GHz in track mode. The DTHA achieves 2-tone SFDR of 46dB with 15GHz input signal. The 1.47mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> chip designed in a 0.18μm SiGe BiCMOS process dissipates 640mW.