A 4-PAM/2-PAM receiver analog front-end (AFE) targeting 20GSymbol/s for use with coaxial cable channels is presented. Behavioral simulations incorporate a transmitter, scalable coaxial cable model, and the proposed receiver architecture, targeting cable loss of 32dB at 10GHz. To accommodate links of varying lengths, the AFE includes a variable-gain amplifier (VGA) and analog peaking equalizer. The input preamplifier is important for achieving the required input sensitivity. A DC bias current is introduced through the feedback resistor in a conventional shunt-shunt feedback nMOS transimpedance amplifier (TIA) to level-shift the output, obviating a following level-shifting stage. The fabricated AFE occupies 0.89mm2 in a 90-nm CMOS process and dissipates 138mW from a 1.3V supply. The AFE amplifies and opens the eye pattern of a 20-Gb/s 2-PAM data stream transmitted over coaxial cable with 7.5dB loss at 10GHz.
| Identifer | oai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/11160 |
| Date | 30 July 2008 |
| Creators | Park, Peter |
| Contributors | Chan Carusone, Anthony |
| Source Sets | University of Toronto |
| Language | en_ca |
| Detected Language | English |
| Type | Thesis |
| Format | 4650098 bytes, application/pdf |
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