| 一种用于音频Σ-ΔA/D转换器的CMOS带隙电压基准源 |
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| 引用本文： | 张吉左.一种用于音频Σ-ΔA/D转换器的CMOS带隙电压基准源[J].电子设计工程,2012,20(18):31-34. |
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| 作者姓名： | 张吉左 |
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| 作者单位： | 湖南人文科技学院物理与信息工程系,湖南娄底,417000 |
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| 摘 要： | 在传统带隙基准电压源电路结构的基础上,通过在运放中引入增益提高级,实现了一种用于音频Σ-ΔA/D转换器的CMOS带隙电压基准源。在一阶温度补偿下实现了较高的电源抑制比(PSRR)和较低的温度系数。该电路采用SIMC 0.18-μm CMOS工艺实现。利用Cadence/Spectre仿真器进行仿真,结果表明,在1.8 V电源电压下,-40～125℃范围内,温度系数为9.699 ppm/℃;在27℃下,10 Hz时电源抑制比为90.2 dB,20 kHz时为74.97 dB。
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| 关 键 词： | 带隙基准 CMOS 电源抑制比 温度系数 |
A CMOS bandgap voltage reference source for audio ∑-ΔA/D converter |
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| ZHANG Ji-zuo.A CMOS bandgap voltage reference source for audio ∑-ΔA/D converter[J].Electronic Design Engineering,2012,20(18):31-34. |
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| Authors: | ZHANG Ji-zuo |
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| Affiliation: | ZHANG Ji-zuo(Science and Technology Department,Hunan University of Humanities,Loudi 417000,China) |
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| Abstract: | An optimized PSR enhance stage was inserted in OPAMP of the classic CMOS bandgap voltage reference source,and one CMOS bandgap voltage reference source for audio ∑-ΔA/D converter was designed.It featured high power supply rejection ratio(PSRR) and low temperature coefficient with first-order temperature compensation.The circuit was implemented in SMIC 0.18-μm CMOS process.The simulation results in Cadence/Spectre showed that the circuit had a temperature coefficient of 9.699ppm/℃ at 1.8V supply voltage from-40℃ to 125℃ and a PSRR up to 90.2 dB(10 Hz) and 74.97 dB(20 kHz) at 27℃. |
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| Keywords: | bandgap reference CMOS power supply rejection ratio(PSRR) temperature coefficient |
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