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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 25Gbaud PAM-4 Linear Burst-Mode Receiver With Analog Gain- and Offset Control in 0.25μm SiGe:C BiCMOS
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A 25Gbaud PAM-4 Linear Burst-Mode Receiver With Analog Gain- and Offset Control in 0.25μm SiGe:C BiCMOS

机译：具有模拟增益和偏移控制的25Gbaud PAM-4线性突发模式接收器在0.25μmsige：c bicmos

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摘要

We present a burst-mode receiver (BMRx) whose architecture and design is optimized for linear operation up to 25Gbaud modulation rates. The linear burst-mode receiver (LBMRx) consists of a fixed-gain transimpedance amplifier, followed by a three-stage post-amplifier and a 50-ohm output buffer. The gain of the post-amplifier stages and dc-offsets of the datapath can be quickly adjusted from one burst to the next through combined feedforward (providing rapid settling) and feedback (providing accurate gain and offset control) automatic-gain-control (AGC) and automatic-offset-control (AOC) loops. When receiving 25G NRZ and assembled with a PIN photodetector, a sensitivity of -18.1 dBm and overload of at least 3.5 dBm was measured at a bit-error-rate (BER) of 1E-2, thus supporting a 21.6 dB input dynamic range. When receiving 4-level pulse amplitude modulation (PAM-4), a sensitivity of -11.4 dBm and overload of at least 4.4 dBm was measured at a low-density-parity-check (LDPC) BER reference of 1E-2, supporting 15.8 dB dynamic range. Between -10 up to 3.5 dBm the LBMRx also features internal start-of-burst (SOB) and end-of-burst (EOB) detection. Over the specified input dynamic range, the total harmonic distortion (THD) remains below 5%. The receiver was designed in a 0.25 mu m SiGe:C BiCMOS technology, occupying an area of 1.32 x 1.05 mm(2) and consumes 280 mW from a 2.5 V supply. This LBMRx can be used as front-end for new upcoming passive optical networks (PONs) that may require, e.g., electronic equalization (to overcome bandwidth limitations of opto-electronic components) or dispersion compensation; or may be used to support advanced modulation formats requiring linear operation.
机译：我们介绍了一个突发模式接收器（BMRX），其架构和设计优化了直线操作，可达25Gbaut调制率。线性突发模式接收器（LBMRX）由固定增益跨阻抗放大器组成，然后是三级放大器和50欧姆输出缓冲区。通过组合前馈（提供快速沉降）和反馈（提供准确的增益和偏移控制）自动增益控制（提供准确的增益和偏移控制）自动增益控制（提供准确的增益和偏移控制），可以从一个突发到接下来的一个突发到接下来的一个突发来快速调整数据阶段的增益和DATAPATH的DC偏移。（提供准确的增益和偏移控制）自动增益控制（AGC ）和自动偏移控制（AOC）循环。当接收25G NRZ并用销光电探测器组装时，以1E-2的比特差速率（BER）测量-18.1dBm的灵敏度-18.1dBm和至少3.5dBm的过载，因此支持21.6dB输入动态范围。当接收到4级脉冲幅度调制（PAM-4）时，在1E-2的低密度奇偶校验（LDPC）基准中，测量-11.4 dBm的灵敏度和至少4.4dBm的过载，支持1E-2，支持15.8 DB动态范围。在-10到3.5 dBm之间，LBMRX还具有内部启发（SOB）和突发结束（EOB）检测。在指定的输入动态范围内，总谐波失真（THD）保持低于5％。接收器设计成0.25 mu M SiGe：C BICMOS技术，占地1.32 x 1.05 mm（2）的面积，从2.5 V供电消耗280 mW。该LBMRX可以用作新的即将到来的被动光网络（PON）的前端，其可能需要，例如电子均衡（克服光电子元件的带宽限制）或色散补偿;或者可用于支持需要线性操作的高级调制格式。

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