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A Supply-Scalable-Serializing Transmitter With Controllable Output Swing and Equalization for Next-Generation Standards.
- Source :
-
IEEE Transactions on Industrial Electronics . Jul2018, Vol. 65 Issue 7, p5979-5989. 11p. - Publication Year :
- 2018
-
Abstract
- Supporting a wide operating range for industrial-standard backward-compatible transmitters often results in energy inefficiency. This paper describes an energy-efficient voltage-mode-serializing transmitter with an operating range of up to 32 Gb/s. The proposed transmitter uses a programmable internal supply to set the voltage level for various data rates optimally, thus improving overall energy efficiency. Output swing and pre-emphasis levels are largely adjustable while the constant output impedance is maintained using a dedicated control loop. CMOS-logic-based circuits and quarter-rate clocking enhance the energy efficiency over the entire data rate range, while a P-over-N voltage-mode driver is used to achieve a high maximum output swing. Two supply regulators with replicas provide constant pull-up and pull-down impedances of the output driver. The variable output swing, pre-emphasis, and internal supply are realized by using segmented output drivers and replicas. The proposed transmitter, fabricated in a 65-nm CMOS process, occupies an active area of 0.173 mm2. The prototype chip achieves a wide output swing range of 0.4–1.3 Vppd and an energy efficiency of 2.10–3.45 pJ/bit, across a data rate of 5 –32 Gb/s. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 02780046
- Volume :
- 65
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industrial Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 128399826
- Full Text :
- https://doi.org/10.1109/TIE.2017.2779439