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首页> 外文期刊>Analog Integrated Circuits and Signal Processing >Performance analysis of SiGe-HBT-based transimpedance amplifiers with nonconstant gain-bandwidth technique
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Performance analysis of SiGe-HBT-based transimpedance amplifiers with nonconstant gain-bandwidth technique

机译：基于SiGe-HBT的跨阻抗放大器与非合并增益带宽技术的性能分析

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摘要

The performance of a transimpedance amplifier (TIA) can be enhanced by lowering the input impedance and applying the nonconstant gain-bandwidth product (GBP) technique. In this paper, a TIA of utilizing both properties is presented and the performance of the conventional and the proposed TIAs is analyzed theoretically and experimentally. The lowered input impedance increases the operational bandwidth whereas the nonconstant GBP decouples the tradeoff relation between the gain and the bandwidth of the conventional TIA. Since this advantage of the enhanced performance is achieved at the cost of degradation in noise characteristics, however, comprehensive noise analysis and in-depth comparison between the conventional and the proposed TIAs are investigated. In the proposed design, a common-base stage is inserted as the first stage in the conventional TIA for lowering the input impedance. In addition, the global feedback network is formed for achieving nonconstant gain-bandwidth. Compared with the conventional TIA, the measurement results show that the proposed TIA presents a 6.3x increase in GBP and a 33% increase in the spot noise, exhibiting an improvement of 3.5x in the overall figure-of-merit.
机译：通过降低输入阻抗并应用非合并增益带宽产品（GBP）技术，可以提高跨阻抗放大器（TIA）的性能。在本文中，提出了利用这两种性质的TIA，从理论上和实验地分析了常规和拟议的TiS的性能。降低的输入阻抗增加了操作带宽，而非合理的GBP使传统TIA的增益与带宽之间的权衡关系进行解耦。由于在噪声特性的降解成本中实现了增强性能的这种优点，但是，研究了传统和提出的TiS之间的全面噪声分析和深入比较。在所提出的设计中，将公共基级作为传统TIA中的第一阶段插入，以降低输入阻抗。另外，形成全局反馈网络，用于实现非合作增益带宽。与常规TIA相比，测量结果表明，所提出的TIA增加了6.3倍的GBP增加，点噪声增加33％，表现出3.5倍的总体图中的优点。

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