Development of Low Frequency Small Signal Amplifier using BJT-JFET in Sziklai Pair Topology
Sachchidanand Shukla1, Pratima Soni2, Naresh Kumar Chaudhary3, Geetika Srivastava4
1Sachchidanand Shukla*, Professor, Department of Physics & Electronics, Dr. Ram Manohar Lohia Avadh University, Ayodhya, India.
2Pratima Soni, Research Scholar, Department of Physics & Electronics, Dr. Ram Manohar Lohia Avadh University, Ayodhya, India.
3Naresh Kumar Chaudhary, Associate Professor, Department of Physics & Electronics, Dr. Ram Manohar Lohia Avadh University, Ayodhya, India.
4Geetika Srivastava, Associate Professor, Department of Physics & Electronics, Dr. Ram Manohar Lohia Avadh University, Ayodhya, India.
Manuscript received on August 01, 2020. | Revised Manuscript received on August 05, 2020. | Manuscript published on September 30, 2020. | PP: 217-223 | Volume-9 Issue-3, September 2020. | Retrieval Number: 100.1/ijrte.C4365099320 | DOI: 10.35940/ijrte.C4365.099320
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: A new PSpice Model of BJT and JFET is proposed and its hybrid combination is used in Sziklai pair topology to design small signal amplifier. The proposed amplifier with maximum voltage gain 30.41, maximum current gain 43.05 and THD 2.44% is capable of amplifying low magnitude signals in a frequency range distributed from 3.035Hz to 93.808Hz. This feature explores the possibility to use proposed amplifier circuit in EEG, seismographs and underwater communication circuits. Three different circuit/device combinations are also exposed during the exploration of proposed amplifier and therefore mentioned with primary details. Qualitative behaviour, e.g. temperature dependency, noise behaviour, effect of the variation of biasing resistances and capacitors, small signal AC analysis etc., of the proposed circuit, is also studied to observe its performance under different environment.
Keywords: Sziklai pair, Circuit Simulation, Small signal Amplifier.