A 10 to 15 GHz Digital Step Attenuator With Robust Temperature Tolerance Across -55 ∘C to 125 ∘C

IF 4.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2025-02-27 DOI:10.1109/TCSII.2025.3546292

Jiang Luo;Yao Peng;Qiang Cheng

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引用次数: 0

Abstract

This brief presents an efficient adaptive analog temperature compensation technique that stabilizes the amplitude and phase performance of an RF attenuator over an ultra-wide temperature range without compromising its other metrics. The approach utilizes an adaptive analog temperature-dependent voltage source (AATVS) to supply the binary digital control array, which indirectly biases the gate terminals of MOSFET switches in the attenuation unit. This method effectively mitigates thermal variations in on-resistance and intrinsic capacitance. To validate the technique, a 5-bit digital step attenuator (DSA) was designed and fabricated using a

$0.13~\mu $

m SiGe BiCMOS process. The DSA exhibited excellent consistency in root-mean-square (RMS) amplitude and phase errors across

$- 55~^{\circ }$

C to

$125~^{\circ }$

C, achieving an RMS attenuation error below 0.24 dB, an RMS phase error under 2.3°, and an insertion loss (IL) better than 4.9 dB over 10–15 GHz. To the best of the authors’ knowledge, this letter is the first to implement an AATVS-based compensation mechanism in a 5-bit DSA, ensuring stable amplitude and phase accuracy under extreme thermal variations.

查看原文本刊更多论文

10至15 GHz数字阶跃衰减器，具有-55°C至125°C的耐温能力

本文介绍了一种有效的自适应模拟温度补偿技术，该技术可以在超宽温度范围内稳定射频衰减器的幅度和相位性能，而不会影响其其他指标。该方法利用自适应模拟温度相关电压源（AATVS）提供二进制数字控制阵列，间接偏置衰减单元中MOSFET开关的栅极端子。这种方法有效地减轻了导通电阻和本征电容的热变化。为了验证该技术，设计并制作了一个5位数字阶跃衰减器（DSA），采用了0.13~\mu $ m的SiGe BiCMOS工艺。DSA在$- 55~^{\circ}$ C至$125~^{\circ}$ C范围内的均方根（RMS）幅度和相位误差具有良好的一致性，在10-15 GHz范围内，RMS衰减误差低于0.24 dB， RMS相位误差低于2.3°，插入损耗（IL）优于4.9 dB。据作者所知，这封信是第一个在5位DSA中实现基于aatvs的补偿机制，确保在极端热变化下稳定的幅度和相位精度。

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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来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.