This paper proposes an RF signal generator using a time domain harmonic suppression technique based on Fourier series analysis. The circuit consists of four differential ring voltage control oscillators (VCO’s) with phase differences and the pulse signal summing circuit. By summing pulse signals from VCO’s with appropriate phase differences determined by Fourier series in time domain, the third...

The objective of this work was to develop a prototype for a pulse oximeter. Given the necessity, in most medical interventions, to monitorize Oxygen saturation in peripheral blood (SpO2) a pulse oximeter is highly necessary in any operating room or intensive care unit. The electronic device was built recurring mostly to Integrated Circuit (IC) and its control was performed via a programmed micr...

In this paper a novel low power double edge pulse triggered flip flop (FF) design is present. First, the pulse generation control logic by using the NAND function and is removed from the critical path to facilitate a faster discharge operation. A simple two transistor NAND gate design is used to reduce the circuit complexity. Second, a double edge conditional discharging flip flop is used to re...

A compact High Voltage (HV) module for generating 100V DC output has been developed for biasing of PIN photodiode detector used in dosimetry applications. Two different approaches have been used in designing the HV circuit. In the first case, the circuit employs a low noise, constant frequency pulse width modulating (PWM) boost converter with an inductor operating in

objective: electroporation is the most common method used for the transfection of dna. although this method has been attributed for various cell using different buffer compositions, the effects of dna concentration on the transfection efficiency has not yet been studied. here the correlation between the efficiency of electroporation reaction and increments of dna concentration has been investig...

Analyzing the techniques used in some of the fundamental results in the areas of circuit lowerbounds and learning algorithms

Dye-sensitized solar cells (DSSCs) are categorized as some of inexpensive thin-film solar cells. The basis and foundation of these cells is a semiconductor that consists of an electrolyte and a light-sensitive anode. Titanium dioxide (TiO2) is a semiconductor that plays the role of anode and is the main constituent of these cells. In this paper, we have addressed the functionality and performan...

– In this paper the attention is focused on the chaotic dynamics of a new circuit driven by two sinusoidal signals. In particular, it is illustrated that the application of signals with slightly different frequencies enables the novel phenomenon of chaotic beats to be generated. Moreover, the paper shows that the proposed circuit can be considered the simplest nonautonomous circuit able to gene...

An accurate and computer efficient analytical model for the evaluation of integrated circuit sensitivity to radiation induced single event transients is presented. The key idea of the work is to exploit a model that allows the rapid determination of the sensitivity of any MOS circuit to single event transients (SETs), without the need to run circuit level simulations. To accomplish this task, b...