Research Article
Comparative Performance Evaluation of Conventional and Tuned Single-Stage Common-Emitter Transistor Amplifiers Using Multisim 11.0
Yusuf Abdullahi*
,
Ismail Garba Saidu,
Muhammad Bello Abdullahi,
Kabir Ahmed Dabai,
Buhari Bello Sahabi,
Aisha Aminu Mode
Issue:
Volume 14, Issue 5, October 2026
Pages:
211-222
Received:
29 July 2026
Accepted:
10 August 2026
Published:
9 September 2026
DOI:
10.11648/j.jeee.20261405.11
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Abstract: The frequency response of transistor amplifiers is a key performance characteristic that determines their suitability for broadband and frequency-selective applications. This study comparatively evaluates the performance of a conventional single-stage common-emitter transistor amplifier and a tuned single-stage common-emitter transistor amplifier using NI Multisim 11.0. Both amplifier configurations were designed and simulated under identical operating conditions using a 2N2222A NPN transistor, a 12 V supply, identical biasing networks, and the same passive components. The only design difference was the replacement of the collector resistor in the conventional amplifier with a parallel LC resonant circuit in the tuned amplifier. The frequency response of both amplifiers was evaluated over the frequency range of 10 Hz to 100 MHz, and the voltage gains were calculated from the simulated output waveforms and expressed in decibels (dB). The results showed that the conventional amplifier maintained a nearly constant mid-band gain of approximately 54 dB over a wide frequency range, demonstrating excellent broadband performance. In contrast, the tuned amplifier produced a maximum gain of approximately 72.04 dB at its designed resonant frequency of 1 kHz, but exhibited a much narrower bandwidth due to its frequency-selective characteristics. The comparative analysis confirms that the conventional amplifier is better suited for broadband signal amplification, whereas the tuned amplifier is more appropriate for narrow-band and radio-frequency applications requiring high gain at a specific frequency. These findings provide useful guidance for selecting suitable transistor amplifier configurations for broadband and frequency-selective electronic and communication applications.
Abstract: The frequency response of transistor amplifiers is a key performance characteristic that determines their suitability for broadband and frequency-selective applications. This study comparatively evaluates the performance of a conventional single-stage common-emitter transistor amplifier and a tuned single-stage common-emitter transistor amplifier u...
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