Analog and Mixed Signal Circuit Design Techniques in Flexible Unipolar a-IGZO TFT Technology: Challenges and Recent Trends

Zulqarnain, Mohammad; Cantatore, Eugenio

doi:10.1109/ojcas.2021.3123206

Cited by 14 publications

(8 citation statements)

References 100 publications

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“…Additionally, the four main features that are necessary for improved wound healing are presented in Figure 5 . These traditional bandages are ideal as a base for biosensors for medical, clinical and diagnostics applications for multiple reasons; these range from surface compatibility and adherence to the skin for mechanical biosensors and flexible electronics to the thermal management, high absorbency and gas exchange for electrochemical biosensors [ 73 , 74 ]. Table 1 summarizes the advantages and disadvantages of the aforementioned six bandage types, and shows that the desired characteristics of the ideal bandage are present in one or a combination of the following types of bandages.…”

Section: Bandage Designmentioning

confidence: 99%

Wearable Smart Bandage-Based Bio-Sensors

2023

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Bandage is a well-established industry, whereas wearable electronics is an emerging industry. This review presents the bandage as the base of wearable bioelectronics. It begins with introducing a detailed background to bandages and the development of bandage-based smart sensors, which is followed by a sequential discussion of the technical characteristics of the existing bandages, a more practical methodology for future applications, and manufacturing processes of bandage-based wearable biosensors. The review then elaborates on the advantages of basing the next generation of wearables, such as acceptance by the customers and system approvals, and disposal.

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Section: Bandage Designmentioning

confidence: 99%

Wearable Smart Bandage-Based Bio-Sensors

2023

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“…This idea was first reported in [12] for a circa 1970s Silicon nMOS only design. However, the stability of the network has not been analyzed but mentioned in [1]. The Pseudo-PMOS load from [2], that analyzed here differs in the implementation of the positivefeedback network and is shown to be inherently stable.…”

Section: Positive-feedbackmentioning

confidence: 99%

“…Amplifier design in amorphous Indium Galium Zinc Oxide (a-IGZO) semiconductor technology presents with its unique set of challenges [1]. While, for example, the performance of an operational transconductance amplifier (OTA), measured by the gain-bandwidth product, is limited by the maximum transconduction g m that the a-IGZO TFT can provide onto a given load capacitance; it is however not the main limiting challenge in amplifier design [2], [1]. The main challenge is achieving high open-loop gain in the opamp is to meet the design specifications when used in practice under negative feedback.…”

Section: Introductionmentioning

confidence: 99%

“…This in turn depends upon realizing high output impedance for the amplifier stage as reported in several published designs [2]- [9], while working with a unipolar device. Many presented techniques depend upon implementing some form of positive-feedback around the load device [1]. However, to our knowledge, a detailed analysis of the positive-feedback based active load in a unipolar technology has not been reported.…”

Section: Introductionmentioning

confidence: 99%

“…However, in this report we focus on realization of high output impedance with such technique. Though the condition on the feedback loop gain A has been argued [1] to be, 0 << A < 1, a more precise criterion is needed for the design of the feedback network to optimize performance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Positive-Feedback-Based Design Technique for Inherently Stable Active Load Toward High-Gain Amplifiers With Unipolar a-IGZO TFT Devices

Dandekar

Myny

Dehaene

2022

IEEE Solid-State Circuits Lett.

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This letter presents analysis of an inherently stable positive-feedback based active load, first reported in our prior work, to realize high gain analog amplifiers using unipolar a-IGZO TFT technology. Additionally reported are theoretical performance bounds and design guidelines to maximally utilize a general positive-feedback scheme for the active load while maintaining stability. To demonstrate a design implementation, a single stage fully differential operational transconductance amplifier with common mode feedback has been manufactured and measured to have 40 dB open-loop gain at DC and a unity gain frequency of 61 kHz while driving a 30 pF load capacitance.

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Thin‐Film Transistors for Integrated Circuits: Fundamentals and Recent Progress

Yan,

Wang,

Yan

et al. 2023

Adv Funct Materials

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High‐performance thin‐film transistors (TFTs) integrated circuits (ICs) have become increasingly necessary to meet the emerging demands such as healthcare, edge computing, and the Internet of Things, etc. This article aims to point out the potential development trends and bottlenecks of TFT ICs, enhancing their performance in terms of electronic performance, stability, consistency, CMOS design, and manufacturing capability. Basic device structures and overall metrics of TFT ICs are explored, as well as their superiority compared to silicon‐based ultrathin chips. Hydrogenated amorphous silicon, low‐temperature polycrystalline silicon, and amorphous oxide semiconductors are widely used in displays due to their ability to be deposited on large areas at low processing temperatures and low cost, and are validated in many prototypes for TFT ICs. Their conduction mechanisms, process flows, performance evaluation, and recent advances are comprehensively viewed. In addition, the potential of emerging low‐dimensional materials as next‐generation channel materials is discussed, along with their limitations and progress in this field. Finally, the major challenges in manufacturing high‐performance TFT ICs and future perspectives are summarized.

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Analog and Mixed Signal Circuit Design Techniques in Flexible Unipolar a-IGZO TFT Technology: Challenges and Recent Trends

Cited by 14 publications

References 100 publications

Wearable Smart Bandage-Based Bio-Sensors

Wearable Smart Bandage-Based Bio-Sensors

Positive-Feedback-Based Design Technique for Inherently Stable Active Load Toward High-Gain Amplifiers With Unipolar a-IGZO TFT Devices

Thin‐Film Transistors for Integrated Circuits: Fundamentals and Recent Progress

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