Microelectronics, Volume. 52, Issue 5, 873(2022)
A Novel High Speed Driver Circuit
A high speed segmented Mach-Zehnder modulators (MZM) driver circuit was designed in a 0.13 μm SiGe BiCMOS process. The bandwidth of the driver input stage was expanded by the capacitive negative feedback, and the common-mode output voltage was stabilized by the common-mode feedback, contributing to a variable gain function. The bandwidth of the output stage was extended by the negative Miller capacitance, T-coil and inductive peaking technology. The propagation delay between close output stages was produced by microstrip transmission lines, so a design method of the microstrip transmission lines was presented. The simulation results show that, the maximum operating rate of the proposed driver circuit is 50 Gbit/s, the voltage output swing is 3 V and the propagation delay between close output stages is 4.9 ps. The driver circuit is well suited for segmented MZM.
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LIU Yong, LI Lin, CUI Wei, SUN Shi. A Novel High Speed Driver Circuit[J]. Microelectronics, 2022, 52(5): 873
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Received: Mar. 21, 2022
Accepted: --
Published Online: Jan. 18, 2023
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