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A 70-Mb/s variable-rate 1024-QAM cable receiver IC with integrated 10-b ADC and FEC decoder

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10 Author(s)
Loke Kun Tan ; Broadcom Corp., Irvine, CA, USA ; Putnam, J.S. ; Lu, F. ; D'Luna, L.J.
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A 70 Mb/s variable-rate 1024-quadrature amplitude modulated (QAM) cable receiver IC with integrated 10 b analog-to-digital converter (ADC) and forward error correction (FEC) decoder is presented. The chip accepts an analog 2 Vpp differential QAM signal centered at an intermediate frequency. The integrated 10 b ADC digitizes the IF signal, and all subsequent signal processing, including demodulation, timing/carrier recovers, adaptive equalization, and FEC, is performed digitally. The receiver IC is capable of receiving 4, 16, 32, 63, 128, 256, and 1024-QAM modulation formats. The 0.5-μm triple level metal N-well CMOS chip has a complexity of 650 k transistors with a core area of 1.9×4.9 mm2. Power dissipation is 1.8 W at 7 MBaud and 5 V

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:33 ,  Issue: 12 )

Date of Publication:

Dec 1998

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