The goal of this research is to propose and investigate a modified NPN-driven Sziklai pair small-signal amplifier using a user-defined PSpice model of unmatched BJTs. The proposed amplifier generates higher amplifier current gain (12904), higher amplifier voltage gain (304.343), wider bandwidth (2.7107 MHz), and higher power gain (65.940 dB-Watt) than previously announced commercial BJTs based NPN Sziklai pair Small-signal amplifiers with an additional biassing resistance. It is also capable of creating distortion-free and fair output for an AC input signal ranging from 1V to 1.6mV at 1KHz frequency. The main characteristics of this amplifier are low input and output noises, as well as outstanding thermal stability over the operating temperature range of -30oC to +50oC. A matched pair of BJTs is used to test the proposed amplifier. Physical analysis of frequency responses and related parameters such as the effect of additional biassing resistance RA, the effect of changing the current gain factor, temperature dependency, noise sensitivity, phase variation, and the range of different biassing resistances and capacitors, as well as small-signal AC analysis, are all investigated in depth. The proposed amplifier could be employed in analogue front-end amplifiers for monitoring the bio-potential signal of the human body with the recommended changes. Its tuning performance also qualifies it for usage in radio and television receiver stages.
Author (S) Details
Sachchida Nand Shukla
Department of Physics and Electronics, Dr. Ram Manohar Lohia Avadh University, Faizabad, Ayodhya, 224001, UP, India.
Geetika Srivastava
Department of Physics and Electronics, Dr. Ram Manohar Lohia Avadh University, Faizabad, Ayodhya, 224001, UP, India.
Syed Shamroz Arshad
Department of Physics and Electronics, Dr. Ram Manohar Lohia Avadh University, Faizabad, Ayodhya, 224001, UP, India.
View Book :- https://stm.bookpi.org/RTCPS-V1/article/view/3606
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