| 具有温度补偿及dB线性增益控制的单级宽范围CMOS可变增益放大器 |
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| 引用本文： | 恽廷华,尹莉,吴建辉,时龙兴. 具有温度补偿及dB线性增益控制的单级宽范围CMOS可变增益放大器[J]. 半导体学报, 2007, 28(4): 518-525 |
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| 作者姓名： | 恽廷华 尹莉 吴建辉 时龙兴 |
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| 作者单位： | 东南大学国家专用集成电路系统工程技术研究中心,南京,210096 |
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| 摘 要： | 提出了一种新颖的宽范围CMOS可变增益放大器结构.利用可变跨导和新颖的可变输出电阻,基于单独可变增益级的放大器可提供80dB的宽范围调节.同时控制电路的设计完成了温度补偿及dB线性增益特性,实现在整个温度及增益调节范围内绝对增益误差小于±1.5dB.基于0.25μm CMOS工艺验证表明,放大器可提供64.5dB的增益变化范围,其中dB线性范围为55.6dB.输入1dB压缩点为-17.5到11.5dBm,3dB带宽为65MHz到860MHz,2.5V电源供电下功耗为16.5mW.
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| 关 键 词： | dB线性 温度补偿 可变增益放大器 自动增益控制 |
| 收稿时间： | 2015-08-18 |
| 修稿时间： | 2006-11-03 |
Single-Stage Wide-Range CMOS VGA with Temperature Compensation and Linear-in-dB Gain Control |
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| Yun Tinghua, Yin Li, Wu Jianhui, Shi Longxing. Single-Stage Wide-Range CMOS VGA with Temperature Compensation and Linear-in-dB Gain Control[J]. Journal of Semiconductors, 2007, In Press. Yun T H, Yin L, Wu J H, Shi L X. Single-Stage Wide-Range CMOS VGA with Temperature Compensation and Linear-in-dB Gain Control[J]. Chin. J. Semicond., 2007, 28(4): 518.Export: BibTex EndNote |
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| Authors: | Yun Tinghua Yin Li Wu Jianhui Shi Longxing |
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| Affiliation: | National ASIC System Engineering Technology Research Center,Southeast University,Nanjing 210096,China;National ASIC System Engineering Technology Research Center,Southeast University,Nanjing 210096,China;National ASIC System Engineering Technology Research Center,Southeast University,Nanjing 210096,China;National ASIC System Engineering Technology Research Center,Southeast University,Nanjing 210096,China |
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| Abstract: | A novel wide-range CMOS variable gain amplifier (VGA) topology is presented. The proposed VGA is composed of a variable transconductor and a novel variable output resistor and can offer a high gain variation range of 80dB while using a single variable-gain stage. Temperature-compensation and decibel-linear gain characteristic are achieved by using a control circuit that provides a gain error lower than + 1.5dB over the full temperature and gain ranges. Realized in 0.25μm CMOS technology, a prototype of the proposed VGA provides a total gain range of 64. 5dB with 55.6dB-linear range,a P-1dB varying from - 17. 5 to 11.5dBm,and a 3dB-bandwith varying from 65 to 860MHz while dissipating 16.5mW from a 2.5V supply voltage. |
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| Keywords: | linear-in-dB temperature compensation variable-gain amplifier automatic gain control |
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