一个数字微调控制的片上RC振荡器

Proceedings of the 44th IEEE 2001 Midwest Symposium on Circuits and Systems. MWSCAS 2001 (Cat. No.01CH37257) Pub Date : 2001-08-14 DOI:10.1109/MWSCAS.2001.986328

Shuhuan Yu, Yiming Chen, Weidong Guo, Xiaoqin Che, K.F. Smith, Yong-Bin Kim

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引用次数: 7

摘要

本文介绍了一种采用微调控制的高精度RC振荡器电路。OSC使用一个7位二进制加权电阻阵列作为修整对象。使用0.5 /spl μ m CMOS工艺，最终输出频率可以在0.5%的误差内实现，而未经修整的原始OSC由于工艺变化而产生高达40%的输出变化。还考虑并解决了温度变化和电源变化。给出了详细的电路设计和SPICE仿真结果。测试芯片的最终芯片尺寸为130 /spl mu/m × 145 /spl mu/m，不包括焊盘。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A digital-trim controlled on-chip RC oscillator

In this paper, a high-accuracy RC Oscillator (OSC) circuit is demonstrated using trimming control. The OSC uses a 7-bit binary-weighted resistor array as the trimming object. Using a 0.5 /spl mu/m CMOS process, the final output frequency can be achieved within 0.5% error while the original OSC without trimming has as much as 40% output variation due to process variations. Temperature variation and power supply variation are also considered and resolved. Detailed circuit design and SPICE simulation results are presented. The final die size of the test chip is 130 /spl mu/m x 145 /spl mu/m excluding bonding pad.

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Proceedings of the 44th IEEE 2001 Midwest Symposium on Circuits and Systems. MWSCAS 2001 (Cat. No.01CH37257)

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