Mathematical Review and Circuit Analysis Software Development for Small-Signal Single-Stage Transistor Amplifier Using Hybrid Parameter
Henry Erialuode Amhenrior,
Samuel Amhanyo Amhenrior
Issue:
Volume 2, Issue 1, June 2018
Pages:
1-8
Received:
30 July 2018
Accepted:
10 August 2018
Published:
5 September 2018
DOI:
10.11648/j.ajqcms.20180201.11
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Abstract: In this paper, a mathematical analysis of a Small-Signal Single-Stage Transistor Amplifier using Hybrid Parameter and the development of a software to aid this analysis was carried out. This was borne out of the desire to be able to correctly and accurately analysis small signal transistors to get the required performance quantities that can be used in the design of circuits. Also, the need to carry out this analysis with minimal error and time was of great motivation for this development. The methodology involved two aspects: the mathematical review of the transistor amplifier and the Software development. In the mathematical Analysis, mathematical tools such as matrix and determinant were used to analyze and evaluate the performance quantities namely the input resistance, the current and voltage gains; the output impedance and the power gain of the small-signal single-stage transistor using the generalized h-parameter configuration equations in a two-port system. Also, the conversion of the generalized h-parameter into the three transistor configurations and the conversion from one configuration to another were obtained. The software development was done in two stages which are the Programming of the Analysis Method and the Graphical User Interface (GUI) Development. The Analysis Method programming was done by the use of Visual Basic version 6 Programming Language through the use of Object Oriented Programming designed with a main program and subroutines namely the Mathematical Analysis, the h-parameter Conversion, the Circuit Diagram Simulation and the h-parameter Equivalent Circuit. These Subroutines are called into the main program whenever needed. The Graphical User Interface is a Menu based system for the administration of the Analysis Software Package. It was developed also by the use of Visual Basic version 6 Programming Language and Microsoft Access Office 2000. The software development is resident in a PC with a Windows Operating System. The test results show that the mathematical analysis was correctly done and the developed Software is very fast, efficient, accurate and reliable in analyzing small signal transistor amplifiers as designed.
Abstract: In this paper, a mathematical analysis of a Small-Signal Single-Stage Transistor Amplifier using Hybrid Parameter and the development of a software to aid this analysis was carried out. This was borne out of the desire to be able to correctly and accurately analysis small signal transistors to get the required performance quantities that can be use...
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Spectroscopy and Dipole Moment of the Molecule C13H20BeLi2SeSi via Quantum Chemistry Using Ab initio, Hartree-Fock Method in the Base Set CC-pVTZ and 6-311G** (3df, 3pd)
Ricardo Gobato,
Marcia Regina Risso Gobato,
Alireza Heidari,
Abhijit Mitra
Issue:
Volume 2, Issue 1, June 2018
Pages:
9-17
Received:
24 July 2018
Accepted:
3 September 2018
Published:
4 October 2018
DOI:
10.11648/j.ajqcms.20180201.12
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Abstract: The work characterizes the electric dipole moment and the infrared spectrum of the molecule C13H20BeLi2SeSi. Calculations obtained in the ab initio RHF (Restrict Hartree-Fock) method, on the set of basis used indicate that the simulated molecule C13H20BeLi2SeSi features the structure polar-apolar-polar predominant. The set of basis used that have are CC-pVTZ and 6-311G** (3df, 3pd). In the CC-pVTZ base set, the charge density in relation to 6-311G** (3df, 3pd) is 50% lower. The length of the molecule C13H20BeLi2SeSi is of 15.799Å. The magnitude of the electric dipole moment |
| total obtained was p = 4.9771 Debye and p = 4.7936 Debye, perpendicular to the main axis of the molecule, for sets basis CC-pVTZ and 6-311**(3df, 3pd), respectively. The infrared spectra for absorbance and transmittance and their wavenumber (cm-1) were obtained in the set of bases used. The infrared spectrum for Standard CC-pVTZ shows peaks in transmittance with Intensity (I), at wavenumber 1,125.44 cm-1, 1,940.70 cm-1, 2,094.82 cm-1, 2,178.43 cm-1, 2,613.99 cm-1 and transmittance 433.399 km/mol, 399.425 km/mol, 361.825 km/mol, 378.993 km/mol, 433.774 km/mol, respectively. While the infrared spectrum for Standard 6-311G**(3df, 3pd), shows peaks in transmittance, at wavelengths 1,114.83 cm-1, 1,936.81 cm-1, 2,081.49 cm-1, 2,163.23 cm-1, 2,595.24 cm-1 and transmittance 434.556 km/mol, 394.430 km/mol, 345.287 km/mol, 375.381 km/mol, 409.232 km/mol, respectively. It presents “fingerprint” between the intervals (680 cm-1 and 1,500 cm-1) and (3,250 cm-1 and 3,500 cm-1). The dipole moments CC-pTZV are 3.69% bigger than 6-311G** (3df, 3pd). As the bio-inorganic molecule C13H20BeLi2SeSi is the basis for a new creation of a bio-membrane, later calculations that challenge the current concepts of biomembrane should advance to such a purpose.
Abstract: The work characterizes the electric dipole moment and the infrared spectrum of the molecule C13H20BeLi2SeSi. Calculations obtained in the ab initio RHF (Restrict Hartree-Fock) method, on the set of basis used indicate that the simulated molecule C13H20BeLi2SeSi features the structure polar-apolar-polar predominant. The set of basis used that have a...
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