Ageing and embedded instrument monitoring of analogue/mixed-signal IPS

Jinbo Wan

    Research output: ThesisPhD Thesis - Research UT, graduation UT

    35 Downloads (Pure)

    Abstract

    With an increasing number of SoCs being used in safety-critical applications like automotive, highly dependable circuits become an important research topic. However, most of the effort until now was spend on pure digital blocks. The most critical part, the analogue front-ends are hardly being dealt with. Therefore, the focus of this thesis is on dependable Analogue/mixed-signal Front-Ends in safety-critical applications like automotive.

    In this thesis, an overview of the dependability of CMOS AMS circuits is provided.
    Emphasis is put on the reliability phenomena of nano-meter CMOS transistors (65nm and below), especially on the dominating NBTI reliability effects. Since this thesis is dominated by NBTI simulations, NBTI physical mechanisms, modelling and simulations are treated in detail. The target AFE in the thesis is also introduced. Two main directions to improve dependability are discussed.

    Two original works are described, dealing with models. One original contribution is a NBTI compact model, which is later used to simulate NBTI degradation of analogue/mixed-signal circuits. Another original result is the MOS drain-current model which is used to build an on-chip Vth0 measurement Embedded Instrument and gather a large amount of NBTI degradation data which is more convenient to design as well as featuring low costs.

    After setting up the reliability model and simulation method, different analogue IP blocks are simulated and discussed to make the analogue IPs dependable. An offset and gain Embedded Instrument for OpAmp IPs is subsequently designed based on a new measurement theory. Several active filters and a 10-bits fully differential SAR ADC are designed in 65nm CMOS technology. Three extra embedded instruments are introduced to detect bandwidth error in OTA-C filters and timing as well as offset errors in the SAR ADCs.

    Based on the information above, some general conclusions are drawn. Limitations of the current and future research are also addressed. At the end of the thesis, all publications written by the author are listed.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • University of Twente
    Supervisors/Advisors
    • Kerkhoff, Hans Gerard, Supervisor
    Award date1 Nov 2019
    Place of PublicationEnschede
    Publisher
    Print ISBNs978-90-365-4829-8
    DOIs
    Publication statusPublished - 1 Nov 2019

    Fingerprint

    Aging of materials
    Monitoring
    Networks (circuits)
    Measurement theory
    Degradation
    Active filters
    Operational amplifiers
    Drain current
    Negative bias temperature instability
    Transistors
    Bandwidth
    Costs

    Cite this

    Wan, Jinbo. / Ageing and embedded instrument monitoring of analogue/mixed-signal IPS. Enschede : University of Twente, 2019. 188 p.
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    abstract = "With an increasing number of SoCs being used in safety-critical applications like automotive, highly dependable circuits become an important research topic. However, most of the effort until now was spend on pure digital blocks. The most critical part, the analogue front-ends are hardly being dealt with. Therefore, the focus of this thesis is on dependable Analogue/mixed-signal Front-Ends in safety-critical applications like automotive.In this thesis, an overview of the dependability of CMOS AMS circuits is provided.Emphasis is put on the reliability phenomena of nano-meter CMOS transistors (65nm and below), especially on the dominating NBTI reliability effects. Since this thesis is dominated by NBTI simulations, NBTI physical mechanisms, modelling and simulations are treated in detail. The target AFE in the thesis is also introduced. Two main directions to improve dependability are discussed.Two original works are described, dealing with models. One original contribution is a NBTI compact model, which is later used to simulate NBTI degradation of analogue/mixed-signal circuits. Another original result is the MOS drain-current model which is used to build an on-chip Vth0 measurement Embedded Instrument and gather a large amount of NBTI degradation data which is more convenient to design as well as featuring low costs. After setting up the reliability model and simulation method, different analogue IP blocks are simulated and discussed to make the analogue IPs dependable. An offset and gain Embedded Instrument for OpAmp IPs is subsequently designed based on a new measurement theory. Several active filters and a 10-bits fully differential SAR ADC are designed in 65nm CMOS technology. Three extra embedded instruments are introduced to detect bandwidth error in OTA-C filters and timing as well as offset errors in the SAR ADCs.Based on the information above, some general conclusions are drawn. Limitations of the current and future research are also addressed. At the end of the thesis, all publications written by the author are listed.",
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    Ageing and embedded instrument monitoring of analogue/mixed-signal IPS. / Wan, Jinbo.

    Enschede : University of Twente, 2019. 188 p.

    Research output: ThesisPhD Thesis - Research UT, graduation UT

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    T1 - Ageing and embedded instrument monitoring of analogue/mixed-signal IPS

    AU - Wan, Jinbo

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    Y1 - 2019/11/1

    N2 - With an increasing number of SoCs being used in safety-critical applications like automotive, highly dependable circuits become an important research topic. However, most of the effort until now was spend on pure digital blocks. The most critical part, the analogue front-ends are hardly being dealt with. Therefore, the focus of this thesis is on dependable Analogue/mixed-signal Front-Ends in safety-critical applications like automotive.In this thesis, an overview of the dependability of CMOS AMS circuits is provided.Emphasis is put on the reliability phenomena of nano-meter CMOS transistors (65nm and below), especially on the dominating NBTI reliability effects. Since this thesis is dominated by NBTI simulations, NBTI physical mechanisms, modelling and simulations are treated in detail. The target AFE in the thesis is also introduced. Two main directions to improve dependability are discussed.Two original works are described, dealing with models. One original contribution is a NBTI compact model, which is later used to simulate NBTI degradation of analogue/mixed-signal circuits. Another original result is the MOS drain-current model which is used to build an on-chip Vth0 measurement Embedded Instrument and gather a large amount of NBTI degradation data which is more convenient to design as well as featuring low costs. After setting up the reliability model and simulation method, different analogue IP blocks are simulated and discussed to make the analogue IPs dependable. An offset and gain Embedded Instrument for OpAmp IPs is subsequently designed based on a new measurement theory. Several active filters and a 10-bits fully differential SAR ADC are designed in 65nm CMOS technology. Three extra embedded instruments are introduced to detect bandwidth error in OTA-C filters and timing as well as offset errors in the SAR ADCs.Based on the information above, some general conclusions are drawn. Limitations of the current and future research are also addressed. At the end of the thesis, all publications written by the author are listed.

    AB - With an increasing number of SoCs being used in safety-critical applications like automotive, highly dependable circuits become an important research topic. However, most of the effort until now was spend on pure digital blocks. The most critical part, the analogue front-ends are hardly being dealt with. Therefore, the focus of this thesis is on dependable Analogue/mixed-signal Front-Ends in safety-critical applications like automotive.In this thesis, an overview of the dependability of CMOS AMS circuits is provided.Emphasis is put on the reliability phenomena of nano-meter CMOS transistors (65nm and below), especially on the dominating NBTI reliability effects. Since this thesis is dominated by NBTI simulations, NBTI physical mechanisms, modelling and simulations are treated in detail. The target AFE in the thesis is also introduced. Two main directions to improve dependability are discussed.Two original works are described, dealing with models. One original contribution is a NBTI compact model, which is later used to simulate NBTI degradation of analogue/mixed-signal circuits. Another original result is the MOS drain-current model which is used to build an on-chip Vth0 measurement Embedded Instrument and gather a large amount of NBTI degradation data which is more convenient to design as well as featuring low costs. After setting up the reliability model and simulation method, different analogue IP blocks are simulated and discussed to make the analogue IPs dependable. An offset and gain Embedded Instrument for OpAmp IPs is subsequently designed based on a new measurement theory. Several active filters and a 10-bits fully differential SAR ADC are designed in 65nm CMOS technology. Three extra embedded instruments are introduced to detect bandwidth error in OTA-C filters and timing as well as offset errors in the SAR ADCs.Based on the information above, some general conclusions are drawn. Limitations of the current and future research are also addressed. At the end of the thesis, all publications written by the author are listed.

    U2 - 10.3990/1.9789036548298

    DO - 10.3990/1.9789036548298

    M3 - PhD Thesis - Research UT, graduation UT

    SN - 978-90-365-4829-8

    PB - University of Twente

    CY - Enschede

    ER -