A Hybrid Line Driver with Voltage-Mode SST Pre-Emphasis and Current-Mode Equalization
- Resource Type
- Conference
- Authors
- Wang, Xiaoran; Gui, Ping
- Source
- 2020 IEEE 63rd International Midwest Symposium on Circuits and Systems (MWSCAS) Circuits and Systems (MWSCAS), 2020 IEEE 63rd International Midwest Symposium on. :750-753 Aug, 2020
- Subject
- Aerospace
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Power, Energy and Industry Applications
Robotics and Control Systems
Signal Processing and Analysis
Finite impulse response filters
Transmitters
Power demand
Hybrid power systems
Impedance
Neutrino sources
Propagation losses
Hybrid Line driver
SST driver
current-mode equalization
voltage-mode pre-emphasis
TXEQ
FIR
- Language
- ISSN
- 1558-3899
The Deep Underground Neutrino Experiment requires a line driver to drive at least 25-meter long twin-axial (twinax) cables. To compensate the high-frequency loss over the long cables and alleviate the de-emphasis of the low-frequency signal magnitude, a hybrid of current-mode transmitter equalization (TXEQ) and voltage-mode pre-emphasis is proposed. The TXEQ employs a finite-impulse response (FIR) filter to boost the high-frequency components while deemphasizing the low-frequency signal magnitude, thereby flattening the overall channel frequency response and reducing Inter-Symbol Interference (ISI). Voltage-mode pre-emphasis is proposed to further boost the high-frequency portion without degrading the signal magnitude. The main driver utilizes voltage-mode source-series-terminated (SST) output stages, which offers higher signal swing and better power efficiency than the conventional current-mode logic (CML) drivers. Designed in 65-nm CMOS, the proposed hybrid line driver operates at 1.28 Gbps and with 6.8 mW power consumption when driving a 25-meter long twinax cable.