Stability analysis and compensation technique for low-voltage regulated cascode transimpedance amplifier

Abdollahi, Behnam; Mesgari, Baset; Saeedi, Saeed; Nabavi, Abdolreza

doi:10.1016/j.mejo.2017.11.009

Cited by 14 publications

(4 citation statements)

References 18 publications

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“…An amplifier can be stable at a particular frequency, but unstable at another. A trade-off exists between the stability and bandwidth of an amplifier [18].…”

Section: Stability Analysismentioning

confidence: 99%

Design and Analysis of a Broadband Microwave Amplifier

Okoyeigbo

Ibhaze

Olajube³

et al. 2021

IJEEI

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This paper presents the procedures involved in the design and analysis of a microstrip broadband microwave amplifier. For system design, simulation, optimization and analysis, a Computer Aided Design (CAD) tool known as Agilent Advanced Design System (ADS) was employed. The amplifier device-FLC317MG-4 FET, was tested for stability, and was observed to be unconditionally stable between 2 to 6 GHz frequency band. Two possible ideal matching circuits were investigated to identify the best matching circuit with the maximum transducer power gain. It was observed that the quarter-wave transformer with parallel open circuit stub, gave a high gain at a wider range of frequency (larger bandwidth/ broadband), than the other matching circuit. Hence, it was employed for the broadband amplifier design using microstrips, and achieved a maximum flat gain of about 9.8 dB to 10.118 dB, at a bandwidth of 3.5 to 4.5 GHz.

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“…An amplifier can be stable at a particular frequency, but unstable at another. A trade-off exists between the stability and bandwidth of an amplifier [18].…”

Section: Stability Analysismentioning

confidence: 99%

Design and Analysis of a Broadband Microwave Amplifier

Okoyeigbo

Ibhaze

Olajube³

et al. 2021

IJEEI

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show abstract

“…Modified versions of the RGC structure have been proposed to overcome the headroom limitation and provide lower input impedance. [8][9][10][11][12][13][14] The other common topology to reduce the input impedance is to use the cross-coupled structure. 15 This structure is shown in Figure 1C.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, limited headroom is available for the effective voltage of M 2 or voltage drop across R D . Modified versions of the RGC structure have been proposed to overcome the headroom limitation and provide lower input impedance 8–14 …”

Section: Introductionmentioning

confidence: 99%

Employing bias current feedback in MIC transimpedance amplifier to increase bandwidth

Sohrabi,

Behnazar

2023

Circuit Theory & Apps

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SummaryThis paper presents an inductorless transimpedance amplifier (TIA) that employs bias feedback technique in a MOS‐based immittance converter (MIC) to achieve high bandwidth. The bias feedback technique is analyzed and explored as a supplementary approach to reduce the input impedance in a current buffer structure. Employing this technique in a MIC‐based TIA structure provides an additional degree of freedom for the design and helps reduce the trade‐off between bandwidth and power. The proposed structure is designed and simulated in 0.18 μm CMOS technology considering a 1 pF photodiode capacitance. The post‐layout simulation results show that the TIA provides a transimpedance gain of 50.9 dBΩ, a bandwidth of 6.1 GHz, and an input‐referred current noise of 9.9 pA/√Hz. The circuit consumes 3.42 mW from a 1.8 V supply and occupies 0.0046 μm2 area. Results are compared with TIAs reported in the literature, which confirms the effectiveness of the proposed modified MIC structure.

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“…These techniques lead to a further extension of the amplifier bandwidth. Others have focused on power and stability optimisation, while maintaining high bandwidths [10,11].…”

Section: Introductionmentioning

confidence: 99%

A High Bandwidth Modified Regulated Cascode TIA for High Capacitance Photodiodes in VLC

Kassem

Darwazeh

2019

2019 IEEE International Symposium on Circuits and Systems (ISCAS)

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This paper proposes, for the first time, a modification of the conventional regulated cascode (RGC) amplifier which improves its tolerance to ultra-high photodiode capacitances. In conventional RGCs, there is a Miller capacitance introduced by the base-collector capacitance of the common base stage, limiting bandwidth gain and potentially result in amplifier instability. Here, we eliminate these undesirable characteristics by introducing an additional cascode stage that nullifies the Miller capacitance. We show that exceptional improvements in bandwidth can be made, which is important in the context of visible light communications systems, where using large-area (large capacitance) photodiodes is desirable.

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Stability analysis and compensation technique for low-voltage regulated cascode transimpedance amplifier

Cited by 14 publications

References 18 publications

Design and Analysis of a Broadband Microwave Amplifier

Design and Analysis of a Broadband Microwave Amplifier

Employing bias current feedback in MIC transimpedance amplifier to increase bandwidth

A High Bandwidth Modified Regulated Cascode TIA for High Capacitance Photodiodes in VLC

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