Abstract
This paper presents a quad single-ended cable driver delivering 2400 mV swing on each channel when double-terminated with 75 Ω loads from a 3.3 V termination supply. Fabricated in 0.18 μm SiGe BiCMOS it implements a switched current source to replace the conventional current steering emitter-coupled pair, with output swing controlled via replica biasing in place of a current mirror. All outputs meet industry-standard specifications for SD (270 Mb/s), HD (1.485 Gb/s), and 3G (2.97 Gb/s) data rates across the industrial temperature range, and the device is rated to withstand 4 kV human body model electrostatic discharge. The high swing can be applied directly to compensate for broadband implementation losses or configured to provide up to 9 dB of programmable preemphasis, extending the specified compliance point to the far end of 2 5 m (3G rate) or 40 m (HD rate) of Belden 1694A coaxial cable.
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