Low Frequency Response of CS-CS Multistage Amplifier | Electronic Devices and Circuits 2 in EXTC

TL;DR

In this video, the process of calculating the lower cut-off frequency in multi-stage amplifiers using RC circuits is explained.

Transcript

hello guys in this particular video we will learn low frequency response of cscs that is fft f18 cascade mode multi-stage amplifier now whenever we will learn low frequency response that means we have to calculate the lower cut off frequency after which i will get the constant value of gain which is required from the custom customer aspects custome... Read More

Key Insights

• 😘 The low-frequency response of multi-stage amplifiers is determined by the RC circuits in each stage.
• 😘 The lower cut-off frequency is calculated using the formula 1/(2πRC).
• 😘 The value of the lower cut-off frequency is determined by the stage with the highest frequency value among the RC circuits.
• 🉐 Bypass capacitors can be used to increase gain, while negative feedback can be used to decrease gain in multi-stage amplifiers.

Questions & Answers

Q: What is the purpose of calculating the lower cut-off frequency in multi-stage amplifiers?

Calculating the lower cut-off frequency helps determine the range of frequencies at which the amplifier will have a constant gain, which is important from the customer's perspective.

Q: How are lower cut-off frequencies calculated in each stage of the amplifier?

The lower cut-off frequency is calculated using the formula 1/(2πRC), where R and C represent the resistance and capacitance values of the RC circuit in each stage.

Q: What are the components involved in the RC circuits in each stage?

The components involved include resistors (R), capacitors (C), and optional bypass capacitors (Cs) in the input and output stages.

Q: How is the lower cut-off frequency of the entire circuit determined?

The lower cut-off frequency of the entire circuit is the maximum value among the frequencies calculated for each individual RC circuit.

Summary & Key Takeaways

• The video discusses the analysis of the low-frequency response of multi-stage amplifiers using RC circuits.

• The circuit consists of two stages, each with different resistances and capacitances.

• The lower cut-off frequency is calculated by determining the values of RC circuits in each stage.