40 Gbit/s AlGaAs/GaAs HBT 4:1 multiplexer IC

Microwave packages for 30 Gbit/s analog and digital circuits

“…In the 30 Gbit/s link the multiplexer is driven by a l5 GHz 'lock and the data rate at the inputs is 7. 5 Gbit/s. The 4:l multiplexer was tested by a p plying a 7.…”

“…The package design described above was used for packaging of two different circuits, an AGC amplifier [4] and a 4:l mu'ltiplexer [5]. The AGC amplifier was packaged in a rectangular package with the dimension 0.5" b,y LO", the package has been adapted to the AGC amplifier which has differential inputs and outputs (four microwave connections).…”

“…The 4:l multiplexer was tested by a p plying a 7. 5 Gbit/s 231 -1 PRBS at each input and measuring the output eye diagram. The eye diagram was also measured after amplification using the AGC to test the response Of the AGC am- amplifier were also tested in a set-up using a 1:4 demultiplexer.…”

“…2. 5 Gbit/s systems are widely used commercially and 10 Gbit/s are already beginning to go commercial. It is very likely that the next generation of optical communication systems will operate at 20 Gbit/s and 40 Gbit/s [l].…”

High speed AlGaAs/GaAs HBT circuits for up to 40 Gb/s optical communication

“…The 1 :4 demultiplexer was designed similar multifunctional circuits as the 4:l MUX [3,4]. The circuit was tested onwafer using a 30 Gb/s test signal generated by connecting a 4:l Mux and 1:4 DMUX with 0.8m of semirigid cable.…”