An 80-Gbps Distributed Driver with Two-Tap Feedforward Equalization in 45-nm CMOS SOI
- Resource Type
- Conference
- Authors
- Valenzuela, Luis A.; Dalton, James; Maharry, Aaron; Movaghar, Ghazal; Andrade, Hector; Schow, Clint L.; Buckwalter, James F.
- Source
- 2022 IEEE 22nd Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF) Silicon Monolithic Integrated Circuits in RF Systems (SiRF), 2022 IEEE 22nd Topical Meeting on. :49-51 Jan, 2022
- Subject
- Components, Circuits, Devices and Systems
Engineering Profession
Photonics and Electrooptics
Radio frequency
Semiconductor device measurement
Power demand
Pulse measurements
Measurement uncertainty
Monolithic integrated circuits
Energy efficiency
feedforward equalization
distributed driver
NRZ
PAM-4
CMOS SOI
- Language
- ISSN
- 2474-9761
This paper presents an integrated differential, distributed Mach-Zehnder modulator (MZM) driver with two-tap feedforward equalization (FFE). The driver consists of two-stack, pseudo-differential FET stages capable of voltage swings exceeding the V DD (1V). The measured chip produces error-free (BER $\lt 10^{-11})$ NRZ transmission up to 64 Gbps with 0.3 UI sampling margin and four-level pulse amplitude modulation (PAM-4) transmission up to 80 Gbps (40 Gbaud). The total power consumption of the driver is 310 mW for an energy efficiency of 4.8 pJ/bit for NRZ and 3.9 pJ/bit for PAM-4.