Design of a high-precision oscillator with frequency shift

LIU Wei; WANG Dan-ni; HUANG Dong; GU Ming; SHANG Shi-guang

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Design of a high-precision oscillator with frequency shift

更新时间：2026-09-04

- Design of a high-precision oscillator with frequency shift
- Vol. 38, Issue 4, Pages: 29-34(2021)
- 作者机构：
  
  西安邮电大学电子工程学院,陕西,西安,710121
- 作者简介：
- 基金信息：
- DOI：
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- Published：2021
- 稿件说明：
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刘伟, 王丹妮, 黄东, 顾鸣, 商世广. 一种可频率迁移的高精度振荡器设计[J]. 微电子学与计算机, 2021, 38(4): 29-34.

LIU Wei, WANG Dan-ni, HUANG Dong, et al. Design of a high-precision oscillator with frequency shift[J]. 2021, 38(4): 29-34.
刘伟, 王丹妮, 黄东, 顾鸣, 商世广. 一种可频率迁移的高精度振荡器设计[J]. 微电子学与计算机, 2021, 38(4): 29-34. DOI：

LIU Wei, WANG Dan-ni, HUANG Dong, et al. Design of a high-precision oscillator with frequency shift[J]. 2021, 38(4): 29-34. DOI：

摘要

为了降低DC/DC电源芯片过流期间的功耗，本文设计了一种可频率迁移的高精度振荡器，芯片出现过流情况时，振荡器频率可降至100 kHz以下.基于CSMC 0.25 m 30 V-60 V BCD工艺完成了电路设计、仿真.该振荡器常温下可以得到信号幅值为0.6 V~3.2 V、频率为260 kHz的锯齿波.温度偏差在±4.23%以内，电源灵敏偏差在±1.6%以内.出现工艺角偏差时，采用熔丝修调对振荡器的频率加以修正.

Abstract

In order to reduce the power consumption during the over-current of the DC/DC power supply chip

a high-precision oscillator with frequency shift is designed in this paper. When an overcurrent condition occurs in the chip

the oscillator frequency can be reduced to below 100 kHz. The circuit is simulated based on CSMC 0.25 m 30 V-60 V BCD process. A sawtooth wave with a signal amplitude of 0.6 V~3.2 V and a frequency of 260 kHz can be obtained at normal temperature. Temperature deviation is within ±4.23%

power supply sensitivity deviation is within ±1.6%. When the process corner deviation occurs

the frequency of the oscillator is corrected by fuse trimming.

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references

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陈富涛. 一种高精度低功耗RC振荡器设计[J]. 微电子学与计算机, 2019, 36(6): 74-78. DOI: 10.19304/j.cnki.issn1000-7180.2019.06.016. CHEN F T. Design of a high-precision low-power CMOS RC oscillator[J]. Microelectronics % Comput-er, 2019, 36(6): 74-78. DOI: 10.19304/j.cnki.issn1000-7180.2019.06.016.

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