[A+, 에리카] 회로이론응용및실험레포트 10. OP Amp의 기초 회로

문서 내 토픽

1. OP Amp

OP Amp는 연산증폭기로서 여러 개의 트랜지스터로 구성된 차동 선형 증폭기이다. 실제 OP Amp의 이득은 상당히 크지만 그 값은 유한하며 인가한 전압보다 더 큰 출력 전압은 나올 수 없다. 또한 실제 OP Amp에서의 전압 이득은 단순한 상수가 아니고 주파수와 상관 관계를 가진다.
2. Inverting Amplifier

op amp의 + 단자는 접지되어 있다. Op amp에서 + 단자와 – 단자 는 같은 전압을 유지하기 때문에 + 단자와 – 단자는 그라운드 전압 0V를 유지하고 있다. op amp로 흘러 들어가는 전류는 0이다. 따라서 저항에 흐르는 전류는 수식 1 과 같이 나타낼 수 있다.
3. Non-inverting Amplifier

위의 회로는 non-inverting amplifier 회로이다. inverting amplifier에서와 달리 신호 입력 단자와 그라운드로 연결된 단자가 반대로 연결되어 있다. Op amp에서는 + 단자와 – 단자가 같은 전압을 유지하고 op amp로 흘러 들어가는 전류는 0이다. 따라서 수식 3을 얻을 수 있다.

Easy AI와 토픽 톺아보기

1. OP Amp

OP Amp, or Operational Amplifier, is a fundamental building block in analog electronics and has a wide range of applications. It is a high-gain, differential input, single-ended output amplifier that can be used to perform various analog signal processing functions. The key features of an OP Amp include high input impedance, low output impedance, and the ability to provide gain, filtering, and signal conditioning. OP Amps are widely used in a variety of circuits, such as amplifiers, filters, oscillators, and analog-to-digital converters. They are essential components in many electronic devices, from audio equipment to industrial control systems. The versatility and performance of OP Amps make them a crucial part of modern electronics, and their continued development and improvement are essential for the advancement of analog circuit design.
2. Inverting Amplifier

The inverting amplifier is a fundamental circuit configuration using an operational amplifier (OP Amp). In this configuration, the input signal is applied to the inverting input terminal (-) of the OP Amp, while the non-inverting input (+) is connected to ground. The output of the OP Amp is inverted, meaning that the output signal is 180 degrees out of phase with the input signal. The gain of the inverting amplifier is determined by the ratio of the feedback resistor (Rf) to the input resistor (Ri). This configuration is widely used in various applications, such as signal conditioning, filtering, and analog-to-digital conversion, due to its simplicity, stability, and the ability to provide a wide range of gain values. The inverting amplifier is a versatile and essential building block in analog circuit design, and its understanding is crucial for anyone working with OP Amps and analog electronics.
3. Non-inverting Amplifier

The non-inverting amplifier is another fundamental circuit configuration using an operational amplifier (OP Amp). In this configuration, the input signal is applied to the non-inverting input terminal (+) of the OP Amp, while the inverting input (-) is connected to the output through a feedback resistor (Rf). The output of the OP Amp is in phase with the input signal, meaning that the output signal has the same polarity as the input signal. The gain of the non-inverting amplifier is determined by the ratio of the sum of the feedback resistor (Rf) and the input resistor (Ri) to the input resistor (Ri). This configuration is widely used in various applications, such as signal conditioning, impedance matching, and buffer amplifiers, due to its high input impedance, low output impedance, and the ability to provide a wide range of gain values. The non-inverting amplifier is another essential building block in analog circuit design, and its understanding is crucial for anyone working with OP Amps and analog electronics.