A 40-Gb/s SiGe-BiCMOS MZM Driver With 6-Vp-p Output and On-Chip Digital Calibration

作者：Vera Leonardo^*; Long John R

来源：IEEE Journal of Solid-State Circuits, 2017, 52(2): 460-471.

DOI：10.1109/JSSC.2016.2606601

• Digital phase shifter
• digitally controlled input line
• distributed amplifier (DA)
• dynastat divider
• energy detector
• half-rate-clock PRBS
• injection-locked I/Q oscillator
• Mach-Zehnder modulator driver
• optical communication

A wide-swing optical modulator driver is implemented in 0.13-mu m SiGe-BiCMOS using a three-stage distributed amplifier with a digital input line. Measurements demonstrate 6-Vp-p differential output, symmetric 6-ps (min) rise/fall times, 333-fs (rms) additive jitter, and better than 20-dB output return loss (S-11) below 58 GHz. Full output swing with adjustable (6-12 ps) rise/fall times is realized after a three-step calibration sequence facilitated by an on-chip energy detector and digital control. The circuit supports 28-48-Gb/s external data sources, or 2(11) -1 PRBS and 1-0 internal data generators for calibration and characterization respectively. The 3-mm(2) driver IC (1.8-mm(2) active area) consumes 1.92 W from + 5/-2.5-V supplies.

• 出版日期2017-2