Integrator- Application of Operational Amplifier - Analog Electronics

TL;DR

Learn how to implement an integrator using an operational amplifier and understand the limitations of a simple integrator.

Transcript

click the bell icon to get latest videos from ekeeda hello friends in this particular session we will have to learn the integrator what that integrator is and how we can implement that integrator with operational amplifier let's see first of all first question comes in your mind that what is integrator integrator that means i am integrating input a... Read More

Key Insights

• 🤱 An integrator integrates an input voltage and feeds it to the output.
• 🤗 A simple integrator has limitations such as infinite gain at zero frequency and acting as an open loop configuration.
• 🪜 A practical integrator can be achieved by adding a resistor in parallel with the capacitor.
• 😘 Practical integrators act as low pass filters with a specific cutoff frequency.
• 🉐 The gain of a practical integrator at zero frequency is a finite value, avoiding the infinite gain problem.
• 👋 The practical integrator can be used to convert waveforms, such as converting a square wave to a triangular wave.
• 🅰️ Different types of waveforms can be achieved by using different types of input waveforms with the integrator.

Questions & Answers

Q: What is an integrator and how is it implemented?

An integrator integrates an input voltage and outputs the integrated value. It can be implemented using passive circuits (capacitor and resistor) or active circuits (operational amplifiers).

Q: What are the limitations of a simple integrator?

A simple integrator has infinite gain at zero frequency and acts as an open loop configuration at zero frequency.

Q: How can the limitations of a simple integrator be overcome?

The limitations can be overcome by adding a resistor in parallel with the capacitor, creating a practical integrator. This circuit acts as a low pass filter.

Q: What is the gain of a practical integrator at zero frequency?

The gain of a practical integrator at zero frequency is rf/r, which is a finite value and avoids the infinite gain problem of a simple integrator.

Summary & Key Takeaways

• An integrator integrates an input voltage and feeds it to the output, with the mathematical expression being v_o = ∫(input voltage). This can be implemented using passive circuits (capacitor and resistor) or active circuits (operational amplifiers).

• The limitations of a simple integrator are it has infinite gain at zero frequency and acts as an open loop configuration at zero frequency.

• A practical integrator can be achieved by adding a resistor in parallel with the capacitor. This circuit acts as a low pass filter.