In this study, the general partial differential equation of unsteady groundwater flow through non-homogeneous and anisotropic aquifer was solved by the fully implicit finite difference method with control volume approach. The calibration of permeability and storage coefficients as model parameters was performed by a transformation technique and application of Powell's non-linear optimization me...

This paper introduces a detailed analysis for the operation of the transistor chain in CMOS gates. The chain is modeled by a transistor pair according to the operating conditions of the structure. The system of differential equations for the derived chain model is solved and analytical expressions which accurately describe the temporal evolution of the output voltage, are extracted. For the fir...

This thesis presents a noise-canceling LNA based on a complementary common-gate commonsource combination. It provides active balun functionality with a single-ended input that is power matched to the antenna and a differential current output driving a passive mixer. By allowing class AB operation for both outputs, the LNA achieves a high compression point and its outputs remain balanced under i...

A wireless sub-mm FBAR-based mass sensor fully integrated in a hermetic package is demonstrated. We propose a wafer-scale commercially viable manufacturing process for the integration of the sensor and the interface circuitry. The drift in frequency of the FBAR sensor due to temperature, aging and stress is reduced by a factor of 10 through an integrated differential measurement. The sensor ach...

introduction: many post-surgical wound infections in hospitals cause morbidity and morality of patients and these are usually transmitted via hands of surgical personnel. the aim of the present study was to detect and antibiogram the bacterial agents following scrubbing of hands of surgical personnel before operation. methods: hands of 134 personnels of operation room were swabbed following scr...

Abstrnct -A new fully balanced architecture for high-frequency, lownoise relaxation oscillators is presented. Differential operation is achieved with the use of two grounded capacitors utilizing the circuit parasitics. Bypassing of the regenerative memory function in the oscillator benefits both high-speed and low-noise operation. In addition a detailed analysis of phase noise in relaxation osc...

A fully differential biquadratic filter section for data acquisition in smart sensor microsystems is proposed. The architecture of this biquadratic filter section is built upon a resonant fully differential topology based on a new Fully Differential Multiple Differences Amplifier cell (FDMDA). This biquadratic low-pass Butterworth filter has two differential inputs that can be algebraically sum...