On this page, we will review the Analog Electronics Short Notes PDF Part 11. Welcome to Poly Notes Hub, a leading destination for analog electronics notes for engineering students.
Author Name: Arun Paul
Analog Electronics Short Notes Pdf Part 11
Here we have listed some analog electronics short notes for all types of exams like diploma engineering, degree engineering, and GATE exam and many more. In every page, we have listed 10 short analog electronics questions and answers and anyone can download it by a single click for future use.
1. What is Cut Off Frequency?
Cut off frequency is the frequency at which an amplifier’s gain drops to 70.7% (or -3 dB) of its maximum value. It marks the limits of the amplifier’s bandwidth.
2. What is Frequency Distortion?
Frequency distortion occurs when an amplifier does not amplify all frequencies equally, causing some frequencies to be stronger or weaker, which alters the shape of the original signal.
3. Which Coupling Provides Maximum Voltage Gain?
Transformer coupling provides maximum voltage gain because it allows impedance matching between stages, reducing power loss and improving signal transfer more effectively than other coupling methods.
4. What is the Noise Factor of an Ideal Amplifier?
The noise factor of an ideal amplifier is 1, meaning it adds no additional noise to the signal during amplification, which is practically impossible but used as a reference.
5. What is Direct Coupled Transistor Amplifier?
A direct coupled transistor amplifier uses no capacitors or transformers between stages. It’s suitable for low-frequency or DC amplification, maintaining the full frequency content of the input signal.
6. Why Do You Prefer to Express the Gain in dB?
Gain is expressed in decibels (dB) because it provides a logarithmic scale, making it easier to represent large ratios, compare gains, and analyze cascaded amplifier stages.
7. Why is Transformer Coupling Used in the Final Stage of Multistage Amplifier?
Transformer coupling is used in the final stage to match the output impedance with the load (e.g., speaker), enabling efficient power transfer and maximum output.
8. What is the Purpose of RC or Transformer Coupling?
The purpose of RC or transformer coupling is to transfer AC signals from one stage to another while blocking DC, maintaining proper biasing and improving overall amplification performance.
9. What is Tube Amplifier?
A tube amplifier uses vacuum tubes to amplify signals. It was widely used before transistors and is still popular in audio systems for its warm sound and linear response.
10. What is Transistor Amplifier?
A transistor amplifier uses a transistor to boost weak signals. It is compact, efficient, and widely used in electronics to amplify voltage, current, or power in communication and audio devices.