A 6 Ghz input bandwidth 2 Vpp-diff input range 6.4 GS/s track-and-hold circuit in 0.25 μm BiCMOS

A 0.25 μm SiGe-BiCMOS 6.4 GS/s track-and-hold circuit with an input bandwidth exceeding 6 GHz and up to 2 V_pp-diff input voltage range applies a hold-mode muted preamplifier that reduces signal feedthrough and improves linearity. The track-and-hold circuit provides more than 59 dBc hold-mode SFDR3 for 1.0 to 6.0 GHz 1 V_pp-diff input signals at 6.4 GS/s, outperforming the best commercial THs operated at only 4 GS/s.