Line-impedance matching and signal conditioning capabilities for high-speed feed-forward voltage-mode transmit drivers
| Autor: | Khaldoon Abugharbieh, Armen Durgaryan, Vazgen Melikyan, Abraham Balabanyan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.industry 020208 electrical & electronic engineering General Engineering Line driver Impedance matching Electrical engineering 020206 networking & telecommunications Mixed-signal integrated circuit Hardware_PERFORMANCEANDRELIABILITY 02 engineering and technology Signal Electronic circuit simulation High impedance Hardware_INTEGRATEDCIRCUITS 0202 electrical engineering electronic engineering information engineering Electronic engineering business Electrical impedance Signal conditioning |
| Zdroj: | Microelectronics Journal. 55:26-39 |
| ISSN: | 0026-2692 |
| DOI: | 10.1016/j.mejo.2016.06.007 |
| Popis: | This work presents the design and implementation of a power-efficient 2-tap feed-forward voltage mode driver which has impedance tuning and signal conditioning capabilities. The driver has a robust mechanism to match its impedance to the line impedance even when signal conditioning is enabled which minimizes reflection and improves signal quality. A mixed signal approach that detects and compensates for NMOS and PMOS transistor resistance variation is presented. An analog circuit detects the driver's resistance variation, and a digital circuit controls an analog compensation circuit to maintain line impedance matching for all signal conditioning configurations of the driver. When maximum signal conditioning is enabled, the driver can transmit a 40Gbits/sec PRBS7 signal through a 10 in. FR4 channel. It achieves a differential eye-opening amplitude of 100mVppd and an eye-opening width of 0.8UI consuming 9.7mW of at-speed power. Simulations demonstrate that worst case impedance deviation from 50ź due to process, voltage and temperature variation is 2.7%. The driver is designed in 28nm CMOS process using a 0.85V nominal supply voltage. It is simulated using HSPICE circuit simulator and mixed mode simulations tools. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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