The circuit architecture to generate differential CMOS quadrature (I/Q) local oscillator (LO) signals from a differential input at the same frequency is presented. The circuit features an open-loop implementation, which relies on two matched delays and linear phase interpolation. The feasibility of this approach is demonstrated by implementing an I/Q generator covering the operating frequency range from 1 to 3 GHz, manufactured in a 28-nm bulk-CMOS process. The optimum phase accuracy is better than ±0.4° for the entire measured frequency region. A phase noise performance of −163.2 dBc/Hz at 100-MHz offset is achieved at 2 GHz with a power consumption of only 4.4 mW from a 1.1-V supply.

中文翻译：

---

1-3GHz 自对准开环本地正交相位发生器，相位误差低于 0.4°

介绍了从相同频率的差分输入生成差分 CMOS 正交 (I/Q) 本机振荡器 (LO) 信号的电路架构。该电路采用开环实现方式，依赖于两个匹配的延迟和线性相位插值。这种方法的可行性通过实施覆盖 1 至 3 GHz 工作频率范围的 I/Q 发生器得到证明，该发生器采用 28 纳米体 CMOS 工艺制造。对于整个测量频率区域，最佳相位精度优于 ±0.4°。在 2 GHz 频率下，100-MHz 偏移下的相位噪声性能为 −163.2 dBc/Hz，1.1-V 电源的功耗仅为 4.4 mW。