<scp>PVT</scp>
            ‐compensated low‐voltage and low‐power
            <scp>CMOS LNA</scp>
            for
            <scp>IoT</scp>
            applications

Nejadhasan, Sajad; Zaheri, Fatemeh; Abiri, Ebrahim; Salehi, Mohammad Reza

doi:10.1002/mmce.22419

Cited by 8 publications

(2 citation statements)

References 26 publications

(21 reference statements)

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“…These cells delay the incident signal instead of delay approximation with phase change. Moreover, there are some other applications for below 6 GHz TTD systems for multi-standard applications, data processing, 6G, and IoT [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A PVT resilient true‐time delay cell

Yarahmadi

Jannesari

2023

IET Circuits, Devices & Syst

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A true-time delay (TTD) cell in TSMC 0.18 μm CMOS technology for 1-5 GHz applications is presented. Process variations, ageing effects, field variations, and other non-idealities have some impacts on the TTD cell's devices. One of the vulnerable specifications of TTD cells is their delay variation. While the TTD cell works in a delay line, the cell must have a constant and robust delay in the frequency band. For this matter, the body bias technique is presented and applied to the inductor-less TTD cell. With this technique, the threshold voltage can be manipulated intentionally. So, any variation in this voltage can be compensated with the body biasing of transistors. The simulation results show the TTD cell's robust performance against non-idealities, while delay variation improves more than 3� times in the frequency band of interest. This TTD cell provides a 50.95 pS delay with only 2% variation, while S 11 and S 22 parameters are lower than −10 dB in the 1-5 GHz frequency band. IIP3 of the TTD cell is about 2.7 dBm, and the power consumption is 20.5 mW. K E Y W O R D Sall-pass filter, active filters, analogue integrated circuits, CMOS analogue integrated circuits, continuous time systems, integrated circuit design, low-power electronics, radio frequency filters, Timed array system, True-Time-Delay cellThis is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Introductionmentioning

confidence: 99%

A PVT resilient true‐time delay cell

Yarahmadi

Jannesari

2023

IET Circuits, Devices & Syst

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“…Nowadays, linearity and dynamic range are critical issues for radars, A/D conversion, multi-standard applications like IoT or 5G/6G communications, receiver chains in communication systems, data processing, and imaging sensors [1][2][3][4][5][6]. Multiantenna systems like phased array topologies are suitable for this matter since they can do analog beamforming with very good performance in narrow-band applications [7].…”

Section: Introductionmentioning

confidence: 99%

Wideband True Time Delay Cells

Yarahmadi¹

2023

UWB Technology - New Insights and Developments

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True-time delay (TTD) cells are used in timed array receivers for wideband multi-antenna topologies. TTD cells are divided into two major categories: silicon-based and non-silicon-based structures. Non-silicon-based structures have very good bandwidth but are bulky in the below 10 GHz frequency band. Silicon-based TTD cells are much more compact and better candidates for integrated circuit (IC) design. Passive and active approaches are the two ways to have a silicon-based TTD cell. Passive TTD cells are built by transmission lines (TL), artificial transmission lines (ATL), and LC ladder networks. Their power consumption is very low, and the delay bandwidth is good, but they are still bulky at low frequencies like below 5 GHz applications. Active all-pass filters as TTD cells are presented for these issues. In this chapter, we will discuss the challenges of inductor-based TTD cells. Then, inductor-less TTD cells are presented to address some of the previous structure’s issues. Finally, we will talk about these structures’ challenges as well. Then, the nonidealities effects on the TTD cell’s performance are investigated, and the body bias technique is presented to address these issues.

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An ultra‐low‐power low‐noise amplifier using a combination of current reuse and self‐forward body bias techniques for biomedical applications

Bijari,

Khoshbinahmadi,

Mallaki

2024

Circuit Theory & Apps

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SummaryLow‐power low noise amplifiers (LNAs) are critical block in the radio frequency (RF) front‐end of medical device radiocommunications service (MedRadio) receivers for amplifying weak received signals while introducing minimal noise. Despite the inherently low transconductance of MOS transistors, it is possible to achieve low noise, high gain, and good linearity in low power LNAs. This paper presents a combination of techniques to realize an ultra‐low‐power LNA with a compact size and high performance. The proposed LNA utilizes multiple gm‐boosting and self‐forward body bias techniques, with certain transistors operating in weak inversion. Additionally, the Multi‐Objective Inclined Planes System Optimization algorithm is employed to determine the optimal values of the circuit components, thereby achieving the best compromise among the various performance parameters. The proposed LNA with buffer is designed and simulated using an 180 nm CMOS process over the frequency band of 0.3–1 GHz. Simulated results show that the proposed LNA achieves a gain of 19.6 dB, a noise figure of 5.1 dB, good input matching (S11 < −10 dB), and a third‐order intermodulation intercept point (IIP3) of 3.8 dBm. Additionally, it consumes 320 μW (without buffer) from a 1 V power supply, and the chip area is 235 μm × 372 μm. The simulated results demonstrate that the proposed ultra‐low power LNA is a promising candidate for biomedical applications.

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PVT ‐compensated low‐voltage and low‐power CMOS LNA for IoT applications

Cited by 8 publications

References 26 publications

A PVT resilient true‐time delay cell

A PVT resilient true‐time delay cell

Wideband True Time Delay Cells

An ultra‐low‐power low‐noise amplifier using a combination of current reuse and self‐forward body bias techniques for biomedical applications

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