40 Gb/s analog IC chipset for optical receivers-AGC amplifier, full-wave rectifier and decision circuit implemented using self-aligned SiGe HBTs

40 Gb/s analog IC chipset, an AGC amplifier, a full-wave rectifier and a decision circuit, for optical receivers were developed using SiGe HBT technology. The high performance SiGe HBT and optimized circuit configuration make possible an AGC amplifier with a 47.8 GHz bandwidth, a full-wave rectifier, and a decision circuit with 40 Gb/s operation.