Volume 11 Number 2 September 2022

    
Enhancing the Efficiency of Fixed Transmitters for Better Communication

Vladan Mihajlovic, Marko Kovacevic, Aleksandar Milosavljevic, and Dejan Rancic

https://doi.org/

Abstract Fixed transmitters need to be used for better communication systems for which the correct location of the receivers need to be identified. High frequency and good range of coverage is required to achieve it. In this work we have used the field strength calculation system. We have applied the line rasterization method for producing terrain profile and to avoid arctangent... Read More


Models for Digital Program Amplifiers

Marieta Kovacheva and Ivailo Pandiev

https://doi.org/

Abstract We in this work have introduced models for digital program amplifiers. We have used the operational amplifiers to simplify the techniques. The proposition ensures the input impedance, transfer function (amplifier gain in binary steps versus controlling digital code through SPI), small-signal frequency response, large-signal pulse response, output characteristic (voltage and current limitations) and output resistance. Using microchip, we have extracted... Read More


Bivalent logic in Xfault simulators

Pavlinka Radoyska and Kamen Fillyov

https://doi.org/

Abstract We have introduced the concurrent X fault simulator in this work. It is found that many issues are identified with the fault nature of X fault model and rules. The main issue is the problem of using bivalent logic for bad gates. We have fixed this issue by the use of trivalent logic and bit presentation. Another issue is the... Read More