전자회로설계실습 11차 예비보고서
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[A+] 전자회로설계실습 11차 예비보고서
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2023.06.23
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  • 1. Push-Pull Amplifier
    Push-Pull 증폭기의 동작을 이해하고 Dead zone과 Crossover distortion 현상을 파악하며 이를 제거하는 방법에 대해서 실험하였습니다. 회로 시뮬레이션을 통해 Dead zone이 발생하는 이유와 이로 인한 Crossover distortion 현상을 확인하였습니다. 또한 OP amp를 이용한 negative feedback 회로를 구성하여 Dead zone을 제거하고 Crossover distortion을 개선할 수 있음을 확인하였습니다. 마지막으로 Push-Pull 증폭기의 전력 소모를 계산하여 비교하였습니다.
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  • 1. Push-Pull Amplifier
    Push-pull amplifiers are a type of audio power amplifier circuit that utilizes two active devices, typically transistors or vacuum tubes, to amplify an input signal. The key feature of a push-pull amplifier is that the two active devices operate in complementary fashion, with one device amplifying the positive half-cycle of the input signal and the other device amplifying the negative half-cycle. This configuration offers several advantages over single-ended amplifier designs, including improved efficiency, reduced even-order harmonic distortion, and the ability to handle higher power levels. The push-pull topology is widely used in audio power amplifiers, particularly in high-fidelity audio systems, as it can provide high output power while maintaining low distortion. The complementary operation of the two active devices also allows for the use of transformers, which can further improve efficiency and provide impedance matching between the amplifier and the load, such as a loudspeaker. One of the main challenges in designing a push-pull amplifier is ensuring that the two active devices are properly biased and balanced, as any mismatch or imbalance can lead to increased distortion and reduced performance. Additionally, the design of the output transformer or other coupling components can also have a significant impact on the overall performance of the amplifier. Despite these challenges, push-pull amplifiers remain a popular choice for high-quality audio applications due to their inherent advantages in terms of efficiency, distortion, and power handling. As audio technology continues to evolve, the push-pull topology is likely to remain an important and widely used design approach for audio power amplifiers.
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