This paper presents the design and measurements of a 25-Gb/s inductorless optical receiver in a 0.25-μm SiGe BiCMOS process for 100-Gb/s (25-Gb/s × 4 lines) Ethernet. As the first stage of the proposed optical receiver, a transimpedance amplifier (TIA) employing a pseudo-differential structure with a feedback resistor incorporates DC offset cancellation (DOC) to enhance the input dynamic range. Cascaded by the improved two-stage limiting amplifiers and a 50-Ω output buffer, the receiver achieves high differential swings. For a bit-error rate (BER) of 10⁻¹² at 25 Gb/s, the measured transimpedance gain, bandwidth, sensitivity, and output swing are 63.17 dBΩ, 20.7 GHz, −10.3 dBm, and 352.7 mV, respectively. The power consumption of the entire receiver is 111.6 mW and the core area of the die is 640 μm × 135 μm.

本文介绍了针对0.25μmSiGe BiCMOS工艺的25 Gb / s无电感器光接收器的设计和测量，适用于100 Gb / s（25 Gb / s×4线）以太网。作为拟议的光接收器的第一阶段，采用伪差分结构和反馈电阻的跨阻放大器（TIA）结合了DC偏移消除（DOC）来增强输入动态范围。通过改进的两级限幅放大器和一个50Ω输出缓冲器，该接收器实现了高差分摆幅。对于 25 Gb / s下的10 ^-12的误码率（BER），测得的跨阻增益，带宽，灵敏度和输出摆幅分别为63.17dBΩ，20.7 GHz，-10.3 dBm和352.7 mV。整个接收器的功耗为111.6 mW，芯片的核心面积为640μm×135μm。