Accurate dB-Linear Variable Gain Amplifier With Gain Error Compensation

Inyoung Choi; Heesong Seo; Bumman Kim

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Accurate dB-Linear Variable Gain Amplifier With Gain Error Compensation

机译：具有增益误差补偿的精确dB线性可变增益放大器

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摘要

This paper describes use of a novel exponential approximation for designing dB-linear variable gain amplifiers (VGAs). The exponential function is accurately generated using a simple error-compensation technique. The dB-linear gain is controlled linearly by the gate voltage, resulting in a simple and robust VGA. The proposed dB-linear VGA fabricated in a 65-nm CMOS process achieves a total variable gain range of 76 dB and dB-linear range greater than 50 dB with ±0.5-dB gain error. Under a 1.2-V supply voltage, the current consumption of the VGA is 1.8 mA and that of the output buffer is 1.4 mA. The input-referred in-band noise density is 3.5 nV/√{Hz} and the in-band OIP3 is 11.5 dBm. Due to the very simple circuit topology, the total active area of the VGA and the output buffer is extremely small, 0.01 mm2.

机译：本文介绍了一种新颖的指数近似在设计dB线性可变增益放大器（VGA）时的用途。指数函数是使用简单的误差补偿技术准确生成的。 dB线性增益由栅极电压线性控制，从而产生了简单而稳定的VGA。拟议中的以65 nm CMOS工艺制造的dB线性VGA实现了76 dB的总可变增益范围和大于50 dB的dB线性范围，并具有±0.5 dB的增益误差。在1.2V电源电压下，VGA的电流消耗为1.8 mA，输出缓冲器的电流消耗为1.4 mA。输入参考带内噪声密度为3.5 nV /√{Hz}，带内OIP3为11.5 dBm。由于电路拓扑非常简单，因此VGA和输出缓冲器的总有效面积非常小，仅为0.01 mm 2 。

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来源
《IEEE Journal of Solid-State Circuits》 |2013年第2期|456-464|共9页
作者
Inyoung Choi; Heesong Seo; Bumman Kim;
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作者单位

Dept. of Electr. Eng. & the Div. of Inf. Technol. Convergence Eng., Pohang Univ. of Sci. & Technol. (POSTECH), Pohang, South Korea|c|;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Baseband amplifier; dB-linear; exponential approximation; gain error compensation; linear-in-dB; variable gain amplifier (VGA);

机译：基带放大器;dB线性;指数近似;增益误差补偿;dB线性;可变增益放大器（VGA）;

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1. Cell-Based Variable-Gain Amplifiers With Accurate dB-Linear Characteristic in 0.18 µm CMOS Technology [J] . Liu H., Zhu X., Boon C.C., Solid-State Circuits, IEEE Journal of . 2015,第2期

机译：基于单元的可变增益放大器，具有0.18 µm CMOS技术的精确dB线性特性
2. A Differential CMOS Current-Mode Variable Gain Amplifier with Digital dB-Linear Gain Control [J] . ARUN RAVINDRAN, EVA VIDAL, SEOUNG-JAE YOO, Analog Integrated Circuits and Signal Processing . 2004,第2a3期

机译：具有数字dB线性增益控制的差分CMOS电流模式可变增益放大器
3. Low gain error, linear-in-dB variable gain amplifier with programmable gain range and gain steps [J] . Chen C.-C., Lu N.-K., Zeng Y.-Z. AEU: Archiv fur Elektronik und Ubertragungstechnik: Electronic and Communication . 2010,第12期

机译：低增益误差，dB线性可变增益放大器，具有可编程增益范围和增益阶跃
4. A low gain error two-stage dB-linear variable gain amplifier in 0.35μm CMOS process [C] . Yongsheng Wang, Xinzhi Li, Zhixin Zhang, IEEE International Conference on ASIC . 2017

机译：采用0.35μmCMOS工艺的低增益误差两级dB线性可变增益放大器
5. High gain low power operational amplifier design and compensation techniques. [D] . Li, Lisha. 2007

机译：高增益低功率运算放大器的设计和补偿技术。
6. Continuous-Time ΣΔ ADC with Implicit Variable Gain Amplifier for CMOS Image Sensor [O] . Fang Tang, Amine Bermak, Amira Abbes, -1

机译：具有隐式可变增益放大器的连续时间ΣΔADC用于CMOS图像传感器
7. Design of Reconfigurable dB-Linear Variable-Gain Amplifier and Switchable-Order $g_{m}$ -C Filter in 65-nm CMOS Technology [O] . Hang Liu, Xi Zhu, Muting Lu, 2019

机译：在65-NM CMOS技术中设计可重新配置的DB-Linear可变增益放大器和可切换订单$ G_ {M} $ -C滤波器

Accurate dB-Linear Variable Gain Amplifier With Gain Error Compensation

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