⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种用于802.11ax宽带WLAN的分数-N频率合成器，通过参考四倍频器技术实现了110fsrms的极低抖动，解决了传统设计中VCO易受PA牵引以及缺乏正交输出等问题。
11ax WLAN standard improves the throughput by supporting 1024-QAM in a channel bandwidth of 160MHz, demanding extremely low jitter values for the transmitter (Tx) and the receiver (Rx) synthesizers. Recent work has achieved rms jitter below 200fs [1-4] with the latest rms jitter reported at 75fs [5]. The work in [5] faces a number of challenges if applied to 802.11ax: (1) with a VCO frequency of 5.7 to 7.3GHz, the circuit is prone to pulling by the PA, especially because it incorporates a single spiral inductor (rather than an 8shaped inductor); (2) it does not provide quadrature outputs, and (3) it relies on a 10b digital-to-time converter (DTC) without calibration of its nonlinearity, which folds high-frequency ΔΣ-modulator (ΔΣM) noise unless extremely tight matching is guaranteed. Similarly, the design in [2] is prone to pulling as well.
Fei Song1, Yu Zhao1, Bart Wu1, Litian Tang1, Leon Lin1, Behzad Razavi2
Ubilinx Technology, San Jose, CA 2 University of California, Los Angeles, CA 1 The next-generation 802