Compact High-Gain Lumped Differential 40 Gb/s Driver Amplifiers in Production 0.15 mum PHEMT Technology

High-peformance and very compact 40Gb/s driver amplifiers were realized in mature 0.15 mum depletion PHEMT technology. The 3-stage lumped differential drivers feature a large differential 40 Gb/s output swing of up to 7.5 V sub pp, RMS jitter of less than 800 fs, rise and fall times of less than 10 ps and more than 27 dB gain. The small size (1.4 x 1.7 mm) and ability to have DC coupled in- and output, enable compact and cost-effective optical 40 Gb/s long-haul transmitters with system grade NRZ and RZ eyediagrams.