Abstract The operational amplifier (Op-amp) plays a significant role in the circuit design. This article proposes topology of multi-stage Op-amp design and theoretical calculations LTSpice simulations are also involved terms performance including differential input resistance, voltage gain, output impedance, total current consumption. Since these performances affected by some resistors other de...

This paper discusses the undesirable charge transfer by the parasitic capacitances of the input transistors in a voltage sense amplifier. Due to its intrinsic rail-to-rail voltage transition, the input sides are inevitably disturbed. It can possible disturb the stabilities of the reference voltage levels. Moreover, it becomes serious in multi-channel systems by altering them for other channels,...

This paper discusses the undesirable charge transfer through the parasitic capacitances of the input transistors in a multi-inputs voltage sense amplifier. Its intrinsic rail-to-rail voltage transitions at the output nodes inevitably disturb the input sides through the capacitive coupling between the outputs and inputs. Then, it can possible degrade the stabilities of the reference voltage leve...

This paper presents a novel control method to improve the efficiency of low-voltage DC-DC converters at light loads. Pulse Width Modulation (PWM) converters have poor efficiencies at light loads, while pulse frequency modulation (PFM) control is more efficient for the same cases. Switching losses constitute a major portion of the total power loss at light loads. To decrease the switching losses...

Sensors & Transducers Journal (ISSN 1726-5479) is a peer review international journal published monthly online by International Frequency Sensor Association (IFSA). Available in electronic and CD-ROM. Abstract: This paper represents the optimization of micro resonator design using Genetic Algorithm. Optimized physical layout parameters are generated using genetic algorithm. Optimization evaluat...

in the present study, five modeling approaches of ra, mlp, mnn, gff, and canfis were applied so as to estimate the radial overcut values in electrochemical drilling process. for these models, four input variables, namely electrolyte concentration, voltage, initial machining gap, and tool feed rate, were selected. the developed models were evaluated in terms of their prediction capability with m...

The critical challenges with integrating renewable energy into the grid are smooth power flow control, isolation between high-voltage and low-voltage networks, voltage regulation, harmonic isolation, quality regulation. This paper considers design construction of a two-stage DC-AC solid-state transformer based on wide bandgap (WBG) semiconductor technologies, an optimized medium-frequency trans...

This paper proposes a control method that can balance the input current of the three phase, three wire, Boost rectifier under unbalanced input voltage condition. The control objective is to operate the rectifier in the high power factor mode under normal operating condition but to give ovemdmg priority to the current balance function in case of unbalance in the input voltages. The inner loop im...

In this study, design theory and analysis for the class E power amplifier (PA), considering the metal oxide semiconductor field effect transistor (MOSFET) parasitic input and output capacitances, are proposed. The input resistance and capacitances cause non-ideal input voltage at gate terminal, which affect the specifications of the class E PA. In the proposed study, non-linear drain-to-source,...