i-manager's Journal on Circuits and Systems (JCIR)


Volume 10 Issue 1 January - June 2022

Research Paper

Development of a General Purpose First-In-First-Out (FIFO) Core

Marcus Lloyde George* , Nora Innocent-George**
* Department of Electrical and Computer Engineering, University of the West Indies, St. Augustine, Trinidad and Tobago.
** Department of Science and Agriculture, University of the West Indies, St. Augustine, Trinidad and Tobago.
George, M. L., and Innocent-George, N. (2022). Development of a General Purpose First-In-First-Out (FIFO) Core. i-manager’s Journal on Circuits and Systems, 10(1), 1-14. https://doi.org/10.26634/jcir.10.1.18663

Abstract

First-In-First-Out cores (FIFOs) are memory storage elements that are used in digital systems for buffering data through a system for later processing. This paper presents the design and implementation of a General Purpose FIFO Core which allows adjustment of the capacity along with the size of each data word. Status indicators were provided to indicate whether or not the FIFO was empty, half-full, or full. The number of data words stored in the FIFO was also indicated by designated output ports of the system. A status flag was also available to indicate when the size reached a predetermined threshold value. A separate interface was provided that allowed the data at any address to be accessed for reading. It was also possible to write a data word to the back of the FIFO while another data word was read from the front simultaneously. The FSM-D architectural model was applied to the design of the FIFO Core and the implementation was done in VHDL using the Xilinx ISE 14.7. The implemented core was simulated using ISim Logic Simulator of the Xilinx ISE platform, and it was found that the system core behaved as specified by the test cases.

Research Paper

Performance Analysis of Shunt Active Filter Based on SRF Theory using Metaheuristic Optimization Technique for Nonlinear Loads

Nidhi Sahu* , Sandeep Sahu**
*-** Department of Electrical and Electronics Engineering, Chhatrapati Shivaji Institute of Technology, Durg, Chhattisgarh, India.
Sahu, N., and Sahu, S. (2022). Performance Analysis of Shunt Active Filter Based on SRF Theory using Metaheuristic Optimization Technique for Nonlinear Loads. i-manager’s Journal on Circuits and Systems, 10(1), 15-24. https://doi.org/10.26634/jcir.10.1.18845

Abstract

Power electronic devices play a vital role in manufacturing process, research and development because it delivers high efficiency, low cost, rapid operation, and optimal size. In recent years, power electronic devices have become widely employed in a variety of fields. Harmonics have a substantial impact on power systems and the main sources of harmonics are nonlinear loads and energy conversion devices such as static converters, choppers, cyclo-converters, battery charging systems, and heating elements, among others. To reduce harmonics, different filtration technologies are available, with the shunt active power filter being one of the most significant and effective. The performance of a shunt active power filter based on synchronous reference frame theory is explored and the efficiency is improved utilising the satin bower bird optimization approach.

Research Paper

Low Power SRAM Cell Design with Power Gating Technique

V. Seetha*
Department of Electronics and Communication Engineering, Meenakshi Ramaswamy Engineering College, Ariyalur, Tamil Nadu, India.
Seetha, V. (2022). Low Power SRAM Cell Design with Power Gating Technique. i-manager’s Journal on Circuits and Systems, 10(1), 25-34. https://doi.org/10.26634/jcir.10.1.18569

Abstract

The power consumption of Static Random-Access Memory (SRAM) cell is considered as a major factor in modern technologies due to voltage scaling. The existing SRAM cell design of consumes more power at higher frequencies. In the proposed work, power reduction is achieved in various radiation-hardened SRAM cell designs which is based on power gating technique. Hence, the power gated voltage (VDD) design technique is employed to reduce power consumption.

Research Paper

Open Circuit Fault-Tolerant Operation of 3-Φ Multilevel Inverter

Sunil Manjhi* , Rajkumar Jhapte**
* Department of Electrical Engineering, Shri Shankaracharya Group of Institution, Junwani, Chhattisgarh, India.
** Department of Electrical and Electronics Engineering, Shri Shankaracharya Technical Campus, Junwani, Bhilai, Chhattisgarh, India.
Manjhi, S. and Jhapte, R. (2022). Open Circuit Fault-Tolerant Operation of 3-Φ Multilevel Inverter. i-manager’s Journal on Circuits and Systems, 10(1), 35-42. https://doi.org/10.26634/jcir.10.1.18816

Abstract

A modified Fault-Tolerant (FT) structure is presented for the five-level Multi-Level Inverter (MLI) in this research work. A self capacitor voltage balancing control regulates the voltage across the capacitor by a half magnitude of the DC source value to produce a five-level output voltage waveform. Furthermore, the self capacitor voltage balancing control reduces complexity and enhances system reliability. A possible Open Circuit (OC) fault in the switches of the proposed structure is further analyzed. On the basis of a comparative analysis between the five-level MLI and the proposed faulttolerant structure, this structure is presented. When compared with the most recent FT topologies, it contains fewer devices. MATLAB/Simulink are used to study the proposed single-phase and three-phase FT structures under pre-fault, fault and post-fault operation.

Research Paper

Design of Low Offset Voltage in Second Stage CMOS Operational Amplifier using 90nm Technology

G. Appala Naidu*
Department of Electronics and Communication Engineering, JNTU-GV, College of Engineering Vizianagaram, Andhra Pradesh, India.
Naidu, G. A. (2022). Design of Low Offset Voltage in Second Stage CMOS Operational Amplifier using 90nm Technology. i-manager’s Journal on Circuits and Systems, 10(1), 43-48. https://doi.org/10.26634/jcir.10.1.18616

Abstract

In this paper a low offset voltage; low power and high gain second stage op-amp of differential amplifier along with common source amplifier with compensated capacitor is proposed. The mathematical analysis of two-stage op-amp is elaborated and this work is compared with exiting similar work. The experimental work carried in CADENCE Virtuoso with 0 gpdk090 process technology is used to obtain 60.994 of Phase Margin, 61 dB DC gain and Offset voltage is 2mV. The M/L ratios are selected accordingly where supply voltage and load voltage are fixed at 1.8V and 12pF respectively. The parametric analysis helps, where the values are fixed to get better response.