Index Catalog // ScholarsArchive@OSU

A comparison of substrate noise coupling in heavily doped and lightly doped substrates for mixed-signal circuits

Creator:: Ayers, James S.
Abstract:: An analysis of substrate noise coupling in mixed-signal circuits has been performed in the TSMC 0.25 [mu]m lightly doped and heavily doped CMOS processes. Methods to minimize noise coupling in both the chip design and board design phases are presented along with techniques for accurate circuit simulation of noise coupling....
Resource Type:: Masters Thesis

A comparison of substrate noise coupling in lightly and heavily doped CMOS processes for 2.4 GHz LNA's

Creator:: Hazenboom, Duncan S.
Abstract:: Three types of low noise amplifiers operating at 2.4GHz were designed. They are the commonly used single-ended and differential amplifiers as well as a new quasi-differential amplifier. The substrate noise injected into these amplifiers is examined for both heavily and lightly doped CMOS substrates. For the single-ended amplifier the noise...
Resource Type:: Masters Thesis

A DC-DC converter architecture for low-power, high-resistance thermoelectric generators for use in body-powered designs

Creator:: Miller, Brian A.
Abstract:: This thesis presents a low power DC-DC converter suitable for harvesting energy from high impedance thermoelectric generators (TEGs) for the use in body powered electronics. The chip has been fabricated in a 130nm CMOS technology. To meet the power demands of body powered networks, a novel dual-path architecture capable of...
Resource Type:: Masters Thesis

A methodology for efficient substrate noise estimation from large scale digital circuits in mixed signal SoC's

Creator:: Held, Martin A.
Abstract:: A methodology for rapid estimation of substrate noise generated by digital circuitry in mixed-signal circuits is presented. This methodology is incorporated into the Silencer! framework, and also provides for future improvements including pre-layout noise estimation. Measurements of a test chip fabricated in the TSMC o.25[mu]m heavily doped logic process validate...
Resource Type:: Masters Thesis

A nano-power wake-up circuit for RF energy harvesting wireless sensor networks

Creator:: Lindsley, Christopher J.
Abstract:: A fully integrated CMOS latched comparator is presented for use as a wake-up circuit that is attached to an RF energy harvester in a battery free wireless sensor network. The system consumes less than 36nA static current at 20°C and dissipates 2pJ of energy per conversion. The comparator comprises of...
Resource Type:: Masters Thesis

A stochastic time-to-digital converter for digital phase-locked loops

Creator:: Ok, Kerem
Abstract:: Digital phase-locked loops (PLLs) have been receiving increasing attention recently due to their ease of integration, scalability and performance comparable to their analog counterparts. In digital PLLs, increased resolution in time-to-digital conversion is desirable for improved noise performance. This work describes the design and simulation of a stochastic time-to-digital converter...
Resource Type:: Masters Thesis

Accurate and efficient simulation of synchronous digital switching noise in system on a chip

Creator:: Habal, Husni
Abstract:: A new method is presented to compress switching information in large digital circuits. This is combined with an efficient approach of generating the noise signatures of cells in a digital library that results in an accurate and efficient approach for estimating the noise generated in digital circuits. This method provides...
Resource Type:: Masters Thesis

Algorithms and simulators for coupled device/circuit simulation

Creator:: Dudar, Taras
Abstract:: Algorithms and simulators comprised of SPICE3 as a circuit level simulator and two device simulators EOFLOW and PROPHET for accurate simulation of new types of devices are presented in this thesis. An integration of EOFLOW with SPICE3 creates a capability for efficient simulation of a system containing interconnected electroosmotic flow...
Resource Type:: Masters Thesis

Algorithms and tools for optimization of integrated RF VCOs

Creator:: Kratyuk, Volodymyr
Abstract:: This thesis presents algorithms and tools for the automated design of RF LC CMOS voltage controlled oscillators (VCOs) with low phase noise given a set of specifications. The electromagnetic solver, ASITIC, combined with the circuit simulator, SpectreRF, allows optimization of the VCO circuit parameters and inductor layout. This approach gives...
Resource Type:: Masters Thesis

An efficient and accurate method of estimating substrate noise coupling in heavily doped substrates

Creator:: Arunachalam, Sasi Kumar S.
Abstract:: This thesis presents a Z-parameter based model to predict the substratenoise coupling between two contacts in a heavily doped substrate for frequenciesless than 2 GHz. The empirical model is scalable with contact size and spacingsbetween the contacts and model parameters can be readily extracted from simu-lated or measured data. The...
Resource Type:: Masters Thesis

An enhanced swing differential Colpitts CMOS VCO for low-voltage operation

Creator:: Farahbakhshian, Farhad
Abstract:: An enhanced swing differential Colpitts VCO (ESDC-VCO) dramatically improves the swing of a Colpitts VCO by allowing the signal to swing below ground and above the supply voltage. Fabricated in a 1P8M 0.13 um CMOS process, the ESDC-VCO operates at 4.9GHz with a 0.475-V supply and consumes 2.7mW. The measured...
Resource Type:: Masters Thesis

An ultra low power frequency reference for timekeeping applications

Creator:: Oporta, Hector Ivan
Abstract:: An ultra low power crystal oscillator that provides a frequency reference for battery powered timekeeping applications is presented. An amplitude control circuit is employed to ensure that minimum current is consumed. A subthreshold voltage regulator provides a supply voltage for the oscillator with minimum current consumption. The oscillator and regulator...
Resource Type:: Masters Thesis

An ultra low voltage micropower GPS receiver RF front-end for wildlife tracking

Creator:: Heiberg, Adam C.
Abstract:: A fully integrated CMOS GPS receiver RF front end optimized for low power operation is presented. The system operates with a supply voltage down to 250 mV. A prototype has been fabricated in a 0.13μm CMOS process and includes a low voltage LNA, quadrature oscillators, and quadrature mixers. It exhibits...
Resource Type:: Masters Thesis

Analysis and design of CMOS RF LNAs with ESD protection

Creator:: Chandrasekhar, Vinay
Abstract:: An analysis that accounts for the effect of standard electrostatic discharge (ESD) structures on critical LNA specifications of noise figure, input matching and gain is presented. It is shown that the ESD structures degrade LNA performance particularly for higher frequency applications. Two LNAs, one with ESD protection and one without,...
Resource Type:: Masters Thesis

Analysis and modeling of substrate noise coupling for NMOS transistors in heavily doped substrates

Creator:: Hsu, Shu-ching
Abstract:: This thesis examines substrate noise coupling for NMOS transistors in heavily doped substrates. The study begins with the analysis of an NMOS transistor switching noise in a digital inverter at the device level. A resistive substrate network for the NMOS transistor is proposed and verified. Coupling between N+- P+ contacts...
Resource Type:: Masters Thesis

Comparison and impact of substrate noise due to clocked and clockless circuitry

Creator:: Le, Jim K.
Abstract:: Delay insensitive asynchronous circuitry provides significant advantages with respect to substrate noise due to localized switching. The differences between the substrate noise from NULL Convention Logic (NCL) and traditional Clocked Boolean Logic (CBL) are described and analyzed based on measured results. A test chip fabricated in the TSMC 0.25 um...
Resource Type:: Masters Thesis

Comparison of time-domain and frequency-domain phase noise analyses

Creator:: Vytyaz, Igor
Abstract:: This thesis presents a comparison of time-domain and frequency-domain algorithms for phase noise calculation in oscillators. Floquet theory provides the mathematical foundation for these calculations and the numerical methods employ perturbation projection vectors (PPVs). The PPVs are an estimate of an oscillator's sensitivity to noise. The in-house circuit simulator SPICE3...
Resource Type:: Masters Thesis

Computationally efficient substrate noise coupling estimation in lightly doped silicon substrates

Creator:: Srinivasan, Kavitha
Abstract:: A Z-parameter based macromodel for characterizing the substrate noise coupling in a lightly doped substrate at low frequencies has been developed. The model is scalable with contact geometries and separation. The cross-coupling impedance between two contacts is modeled using an improved geometric mean distance formulation. This approach obviates the need...
Resource Type:: Masters Thesis

Contributions to substrate noise due to supply coupling and pin parasitics

Creator:: Adluri, Sirisha
Abstract:: This thesis presents the contributions to substrate noise due to supply coupling and the effect of pin parasitics on the substrate noise generated by digital circuits. Various sources of substrate noise and their effect on analog circuits sharing the same substrate are discussed. A simulation approach to isolate the various...
Resource Type:: Masters Thesis

Coupled circuit and device simulations for design of RF MEMS VCOs

Creator:: Behera, Manas
Abstract:: A new coupled circuit and electrostatic/mechanical simulator (COSMO) for the design of RF MEMS VCOs is presented in this thesis. The numerical solution of device level equations is used to accurately compute the capacitance of a MEMS capacitor. This coupled with a circuit simulator facilitates the simulation of circuits incorporating...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

A comparison of substrate noise coupling in heavily doped and lightly doped substrates for mixed-signal circuits

A comparison of substrate noise coupling in lightly and heavily doped CMOS processes for 2.4 GHz LNA's

A DC-DC converter architecture for low-power, high-resistance thermoelectric generators for use in body-powered designs

A methodology for efficient substrate noise estimation from large scale digital circuits in mixed signal SoC's

A nano-power wake-up circuit for RF energy harvesting wireless sensor networks

A stochastic time-to-digital converter for digital phase-locked loops

Accurate and efficient simulation of synchronous digital switching noise in system on a chip

Algorithms and simulators for coupled device/circuit simulation

Algorithms and tools for optimization of integrated RF VCOs

An efficient and accurate method of estimating substrate noise coupling in heavily doped substrates

An enhanced swing differential Colpitts CMOS VCO for low-voltage operation

An ultra low power frequency reference for timekeeping applications

An ultra low voltage micropower GPS receiver RF front-end for wildlife tracking

Analysis and design of CMOS RF LNAs with ESD protection

Analysis and modeling of substrate noise coupling for NMOS transistors in heavily doped substrates

Comparison and impact of substrate noise due to clocked and clockless circuitry

Comparison of time-domain and frequency-domain phase noise analyses

Computationally efficient substrate noise coupling estimation in lightly doped silicon substrates

Contributions to substrate noise due to supply coupling and pin parasitics

Coupled circuit and device simulations for design of RF MEMS VCOs

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