A 56Gbaud PAM-4 Linear Driver for Mach-Zehnder Modulators in 90-nm SiGe BICMOS Technology
- Resource Type
- Conference
- Authors
- Fan, Wentian; Chen, Yingmei; Cui, Haojie; Guo, Chao; Zhu, En; Hu, Zhengfei
- Source
- 2022 3rd Asia Symposium on Signal Processing (ASSP) ASSP Signal Processing (ASSP), 2022 3rd Asia Symposium on. :51-55 Dec, 2022
- Subject
- Computing and Processing
Mach-Zehnder interferometers
Wiring
Semiconductor device measurement
Power transmission lines
Bandwidth
BiCMOS integrated circuits
Transmission line measurements
Linear modulator driver
Mach-Zehnder Modulator (MZM)
4-level pulse amplitude modulation (PAM-4)
SiGe BiCMOS
Single emitter follower push pull (SEFPP)
- Language
This paper presents a 4-level pulse amplitude modulation (PAM-4) linear driver for Mach-Zehnder Modulators (MZM) in 90-nm SiGe BiCMOS technology. The transmission line was employed in the input and output wiring to reduce the transmission loss of the high-speed signal. In addition, by adopting coupled inductor peaking technology and continuous time linear equalizer (CLTE), the bandwidth of system reaches 42.1 GHz. The drive output stage of the system uses single emitter follower push pull (SEFPP) structure to achieve large output swing. Post-simulation results show that the MZM-driver can deliver a differential output signal of 3.6 V pp when inputting 56Gbaud PAM-4 signal of 300-900 mV ppd , and the total harmonic distortion (THD) is 2.7%. The driver works under a 5 V supply with a power consumption equal to 905 mW. The physical layout occupies an area of 0.96×1.1 mm 2 .