⚡ 本页包含 AI 生成的分析内容，仅供参考
本文提出了一种190nW、33kHz的RC振荡器，用于低功耗无线网络中的睡眠定时器，替代外部晶振以降低成本与面积。该振荡器实现了±0.21%的温度稳定性和4ppm的长期稳定性，解决了集成振荡器在功耗与稳定性上的挑战。
In wireless networks with a low duty cycle, the radio is operational for only a small percentage of the time. A sleep timer is used to synchronize the data transmission and reception. The total system power is then limited by the sleep power and the sleep timer frequency stability. Low-frequency crystal oscillators are a common choice for sleep timers due to their excellent long-term stability, frequency stability over temperature, and very low power consumption. However, the external crystal cost and board area are undesired. If an integrated oscillator is used as an alternative, the frequency variation must be minimized so the sleep time can be maximized. Several integrated oscillators with good frequency stability have been proposed in recent publications. In [1], feed-forward correction is used to achieve a stable frequency over temperature, but the voltage sensitivity and die area are large. In
Danielle Griffith1, Per Torstein Røine2, James Murdock1, Ryan Smith1
Texas Instruments, Dallas, TX, 2Texas Instruments, Oslo, Norway