MOSFET Biasing : Enhancement Type MOSFET Biasing Explained

In this video, the biasing of the Enhancement Type MOSFET is explained and the different biasing configurations like Fixed Bias, Voltage Divider Bias, Drain Feedback Bias, and Constant current Biasing is explained.

By watching this video, you will learn the following topics:
0:00 Introduction
0:37 The need for Biasing in MOSFET Amplifier
3:56 Fixed Bias Configuration
9:56 Voltage Divider Bias
14:47 Drain Feedback Bias
16:21 Constant Current Biasing

The need for Biasing in MOSFET Amplifier:
To use the MOSFET as an amplifier, it needs to be operated in the saturation region where the MOSFET operates as a voltage-controlled current source.
To ensure the operation of the MOSFET in the saturation region, and to get linear amplification, MOSFET needs to be biased properly.

MOSFET Biasing Configurations:
There are several ways to bias the MOSFET.
But the following are the most common biasing configurations
1) Fixed Bias
2) Voltage Divider Bias
3) Drain Feedback Bias
4) Constant Current Bias

The Fixed Bias Configuration is the most simple biasing technique, but in this configuration, the operating point is more susceptible to the change in the external parameters and MOSFET parameters.

The Voltage Divider Bias and Drain Feedback Bias stabilize the operating point to some extent.

The constant current Biasing configuration is a more robust biasing configuration and prevents the change in the operating point due to external parameters. Typically it is used in the integrated circuit for the MOS amplifier.

In this video, different biasing configuration, as well as the DC analysis of the different biasing configurations, is explained.

This video will be helpful to all the students of science and engineering in understanding the different MOSFET biasing configuration.

The link for the other useful videos related to MOSFET:

1) Enhancement Tye MOSFET Explained
   • MOSFET - Enhancement Type MOSFET Expl...  

2) Depletion Type MOSFET Explained
   • MOSFET- Depletion Type MOSFET Explain...  

3) Depletion Type MOSFET Biasing Explained
   • MOSFET Biasing: Depletion Type MOSFET...  

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