[A+, 에리카] 회로이론응용및실험레포트 12. Active Filter

문서 내 토픽

1. Active High-Pass Filter

Active high-pass 필터의 전달함수는 수식 1과 같이 나타낸다. 이 회로는 주파수가 작아지면 전달함수의 크기가 작아지고 주파수의 크기가 커지면 전달함수의 크기는 1로 접근한다. 따라서 이 회로는 낮은 주파수의 신호는 통과시키지 않고 높은 주파수의 신호만 통과시킨다.
2. Active Band-Pass Filter

Active band-pass 필터는 low-pass 필터와 high-pass 필터를 직렬로 연결하여 만들 수 있다. 이 회로의 전달함수는 수식 3과 같이 나타내며, 저항 값과 커패시터 값을 가정하면 센터 주파수는 수식 6과 같이 나타낼 수 있다.
3. Active Band-Reject Filter

Active band-reject 필터는 low-pass 필터와 high-pass 필터를 병렬로 연결하여 만들 수 있다. 이 회로의 전달함수는 수식 7과 같이 나타내며, 저항 값과 커패시터 값을 가정하면 센터 주파수는 수식 10과 같이 구할 수 있다.
4. Active Band-Pass Filter Experiment

Active band-pass 필터의 실험 결과, 센터 주파수의 이론 값은 5.03KHz이고 실험 값은 5.02KHz로 나타나 무시가능한 정도의 오차가 발생하였다. 이득 값은 이론적으로 센터 주파수에서 가장 높은 값을 가지며, 실험 결과에서도 유사한 경향이 나타났다.
5. Active Band-Reject Filter Experiment

Active band-reject 필터의 실험 결과, 센터 주파수의 이론 값은 1.59KHz이고 실험 값은 1.58KHz로 나타나 무시가능한 오차가 발생하였다. 이득 값은 이론적으로 센터 주파수에서 가장 낮은 값을 가지며, 실험 결과에서도 유사한 경향이 나타났다.

Easy AI와 토픽 톺아보기

1. Active High-Pass Filter

An active high-pass filter is an electronic circuit that allows high-frequency signals to pass through while attenuating low-frequency signals. This type of filter is commonly used in audio applications to remove unwanted low-frequency noise or rumble, such as from a turntable or microphone. The active design, which incorporates an operational amplifier, provides greater flexibility in adjusting the filter's cutoff frequency and slope compared to passive high-pass filters. This allows for more precise control over the frequency response and can be useful in a variety of signal processing and audio engineering applications. Overall, the active high-pass filter is a versatile and important tool in the field of electronics and signal processing.
2. Active Band-Pass Filter

An active band-pass filter is an electronic circuit that allows a specific range of frequencies to pass through while attenuating frequencies outside of that range. This type of filter is commonly used in audio and communication systems to isolate and extract specific frequency components from a signal. The active design, which incorporates an operational amplifier, provides several advantages over passive band-pass filters, such as the ability to adjust the center frequency, bandwidth, and gain independently. This flexibility allows for more precise control over the frequency response, which can be crucial in applications like audio equalization, signal conditioning, and instrument filtering. Active band-pass filters are widely used in various fields, including audio engineering, telecommunications, and signal processing, where the selective filtering of frequencies is essential for achieving desired system performance.
3. Active Band-Reject Filter

An active band-reject filter, also known as a band-stop or notch filter, is an electronic circuit that attenuates a specific range of frequencies while allowing all other frequencies to pass through. This type of filter is particularly useful in applications where you need to remove or suppress a specific unwanted frequency component from a signal, such as power line interference or a specific noise frequency. The active design, which incorporates an operational amplifier, provides several advantages over passive band-reject filters, including the ability to adjust the center frequency, bandwidth, and gain independently. This flexibility allows for more precise control over the frequency response, which can be crucial in applications like audio processing, instrumentation, and communication systems. Active band-reject filters are widely used in various fields, where the selective attenuation of specific frequency ranges is essential for achieving desired system performance and signal quality.
4. Active Band-Pass Filter Experiment

Conducting an active band-pass filter experiment is a valuable exercise in understanding the principles and practical implementation of this type of electronic circuit. By building and testing an active band-pass filter, students and engineers can gain hands-on experience in designing, analyzing, and optimizing the filter's performance. The experiment typically involves constructing the filter using operational amplifiers, resistors, and capacitors, and then measuring the frequency response to verify the filter's center frequency, bandwidth, and gain characteristics. This practical experience allows for a deeper understanding of the design trade-offs, such as the impact of component values on the filter's performance. Furthermore, the active band-pass filter experiment can be extended to explore the effects of varying the filter parameters, such as the Q-factor or the use of different op-amp configurations. Overall, this type of experiment is an essential part of the learning process in electronics and signal processing, as it bridges the gap between theoretical knowledge and practical application.
5. Active Band-Reject Filter Experiment

Performing an active band-reject filter experiment is a valuable hands-on learning experience that allows students and engineers to deepen their understanding of this type of electronic circuit. The experiment typically involves constructing an active band-reject filter using operational amplifiers, resistors, and capacitors, and then measuring the frequency response to verify the filter's performance. By building and testing the active band-reject filter, participants can gain practical insights into the design trade-offs, such as the impact of component values on the filter's center frequency, bandwidth, and attenuation characteristics. Additionally, the experiment can be expanded to explore the effects of varying the filter parameters, such as the Q-factor or the use of different op-amp configurations. This practical experience is essential for bridging the gap between theoretical knowledge and real-world application, as it allows students and engineers to develop a deeper understanding of the principles and practical implementation of active band-reject filters. Such experiments are invaluable in fields like audio processing, instrumentation, and communication systems, where the selective attenuation of specific frequency ranges is crucial for achieving desired system performance and signal quality.