Title :
A 16-port FCC-compliant 10GBase-T transmitter and hybrid with 76dBc SFDR up to 400MHz scalable to 48 ports
Author :
Gerfers, Friedel ; Farjad, Ramin ; Brown, Michael ; Tavakoli, Ahmad ; Nguyen, David ; Ng, Hiok-Tiaq ; Shirani, Ramin
Author_Institution :
Aquantia, Milpitas, CA, USA
Abstract :
High-density 48-port network switches demand very power-efficient, small form-factor quad PHYs which comply with the IEEE 802.3an transmit PSD and return-loss requirements on the one hand and meet the FCC Class-A specifications on the other hand. We present a 10GBase-T transmitter and hybrid that uses a highly correlated current-mirroring amplifier with output rise time control and high CMRR to perform a first-order linear and non-linear echo cancellation while enabling the design of 48-port FCC compliant network switches. Experimental results over the 400MHz bandwidth exhibit a transmitter linearity of >;57dBc as well as a residual linear echo and distortion of -28dBc and 76dBc, respectively. Implemented in a 40nm CMOS technology, the transmitter plus hybrid consumes 200mW power and occupies 0.5mm2.
Keywords :
CMOS analogue integrated circuits; current mirrors; echo suppression; transmitters; 16-port FCC-compliant 10GBase-T transmitter; 48-port FCC compliant network switches; CMOS technology; CMRR; FCC class-A specification; IEEE 802.3an transmit PSD; bandwidth 400 MHz; current-mirroring amplifier; distortion; first-order linear echo cancellation; form-factor quad PHY; high-density 48-port network switches; nonlinear echo cancellation; output rise time control; power 200 mW; power-efficiency; residual linear echo; return-loss requirement; size 40 nm; transmitter linearity; CMOS integrated circuits; Echo cancellers; Electromagnetic interference; Impedance; Optical transmitters; Radio frequency;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2012 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4673-0376-7
DOI :
10.1109/ISSCC.2012.6177069
