23.2 A 32Gb/s bidirectional 4-channel 4pJ/b capacitively coupled link in 14nm CMOS for proximity communication
23.2 A 32Gb/s bidirectional 4-channel 4pJ/b capacitively coupled link in 14nm CMOS for proximity communication
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23.2 采用 14nm CMOS 的 32Gb/s 双向 4 通道 4pJ/b 电容耦合链路，用于近距离通信
DOI：
10.1109/isscc.2016.7418076
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
B. Casper
中科院分区：
文献类型：
--
作者：
C. Thakkar;Shreyas Sen;J. Jaussi;B. Casper
邻近通信使用高能效混合信号收发器提供无连接器高速接口的便利性[1-4]。这种接口对于外围具有零插入深度连接器的超薄手持/移动设备、模块化电话和密封设备非常有吸引力。由于电感自共振，使用电感耦合的近距离近距离通信通常仅限于相对较低的采样率<；；1.25GS/S[1]。虽然使用耦合传输线(CTL)耦合器的接口是宽带的(<；；12GS/S)[2-3]，但实现被限制为单通道，这可能是由于通道间串扰。已经演示了使用电容耦合的多通道芯片到芯片通信[4]，尽管距离仅为10μm。这项工作提供了一个4通道电容耦合接口(图23.2.1(A))，支持32 Gb/S的聚合数据速率和高达0.8 mm的空气间隔。
Proximity communication offers the convenience of a connector-less high-speed interface using energy-efficient mixed-signal transceivers [1-4]. Such interfaces are attractive for ultra-thin handheld/mobile devices with zero-insertion depth connectors on the periphery, modular phones, and hermetically sealed devices. Proximity communication near millimeter-range using inductive coupling is typically limited to relatively low sampling rates of <;1.25GS/s [1] due to inductor self-resonance. While interfaces using coupled transmission line (CTL) couplers are wideband (<;12GS/s) [2-3], implementations have been limited to a single-channel, which is likely due to inter-channel crosstalk. Multi-channel chip-to-chip communication using capacitive coupling has been demonstrated [4], albeit at a limited distance of 10μm. This work presents a 4-channel capacitively coupled interface (Fig. 23.2.1(a)) that supports an aggregate data-rate of 32Gb/s and up to 0.8mm air separation.