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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >20-25 Gbit/s low-power inductor-less single-chip optical receiver and transmitter frontend in 28 nm digital CMOS
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20-25 Gbit/s low-power inductor-less single-chip optical receiver and transmitter frontend in 28 nm digital CMOS

机译：采用28 nm数字CMOS的20-25 Gbit / s低功耗无电感单芯片光学接收器和发射器前端

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摘要

The design of an analog frontend including a receiver amplifier (RX) and laser diode driver (LDD) for optical communication system is described. The RX consists of a transimpedance amplifier, a limiting amplifier, and an output buffer (BUF). An offset compensation and common-mode control circuit is designed using switched-capacitor technique to save chip area, provides continuous reduction of the offset in the RX. Active-peaking methods are used to enhance the bandwidth and gain. The very low gate-oxide breakdown voltage of transistors in deep sub-micron technologies is overcome in the LDD by implementing a topology which has the amplifier placed in a floating well. It comprises a level shifter, a pre-amplifier, and the driver stage. The single-chip frontend, fabricated in a 28 nm bulk-digital complementary metal-oxide-semiconductor (CMOS) process has a total active area of 0.003 mm(2), is among the smallest optical frontends. Without the BUF, which consumes 8 mW from a separate supply, the RX power consumption is 21 mW, while the LDD consumes 32 mW. Small-signal gain and bandwidth are measured. A photo diode and laser diode are bonded to the chip on a test-printed circuit board. Electro-optical measurements show an error-free detection with a bit error rate of 10(-12) at 20 Gbit/s of the RX at and a 25 Gbit/s transmission of the LDD.
机译：描述了用于光通信系统的包括接收放大器（RX）和激光二极管驱动器（LDD）的模拟前端的设计。 RX由一个跨阻放大器，一个限幅放大器和一个输出缓冲器（BUF）组成。利用开关电容器技术设计了失调补偿和共模控制电路，以节省芯片面积，并连续减小RX中的失调。有源峰值方法用于增强带宽和增益。通过实现将放大器置于浮动阱中的拓扑结构，可以在LDD中克服深亚微米技术中晶体管的极低的栅极氧化物击穿电压。它包括一个电平转换器，一个前置放大器和驱动器级。单芯片前端是采用最小的光学前端之一，采用28 nm体数字互补金属氧化物半导体（CMOS）工艺制造，总有效面积为0.003 mm（2）。如果没有BUF（独立电源消耗的功耗为8​​ mW），则RX功耗为21 mW，而LDD的功耗为32 mW。测量小信号增益和带宽。光电二极管和激光二极管结合到测试印刷电路板上的芯片上。电光测量显示无误检测，RX的20 Gbit / s的误码率为10（-12），LDD的传输为25 Gbit / s。

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