On this page, we will review the Analog Electronics Short Notes PDF Part 18. 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 18
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 Double Tuned Amplifier?
A double tuned amplifier uses two inductively coupled LC circuits, one in the input and one in the output. This improves bandwidth and frequency selectivity, commonly used in intermediate frequency (IF) stages.
2. What is Tuned Class C Amplifier?
A tuned Class C amplifier operates with the transistor conducting for less than 180° of the input signal. A resonant LC circuit restores the full waveform, offering high efficiency for RF amplification.
3. Why are tuned circuits not used for low frequency applications?
Tuned circuits are not used for low frequencies because large inductance and capacitance values are needed to achieve resonance, which makes the components bulky, expensive, and less practical at low frequencies.
4. Why tuned amplifier operated in Class C Operation?
Tuned amplifiers operate in Class C mode for RF applications because Class C offers high efficiency, and the tuned circuit reconstructs the signal waveform, minimizing distortion despite short conduction angles.
5. How does coupling affect the gain of tuned amplifiers?
Coupling between tuned circuits determines energy transfer. Loose coupling gives narrow bandwidth and high selectivity, while tight coupling increases bandwidth but reduces selectivity and may lead to double peaks in gain.
6. What is the effect of Q in the resonance curve?
The quality factor (Q) affects the sharpness of the resonance peak. A high Q value results in a narrow, sharp peak (greater selectivity), while a low Q gives a wider, flatter response.
7. What are the practical applications of Tuned Amplifiers?
Tuned amplifiers are used in radio receivers, television circuits, communication transmitters, RF signal amplification, and band-pass filtering where specific frequency signals need to be selected and amplified.
8. What is Parallel Tuned Circuit?
A parallel tuned circuit consists of an inductor and a capacitor connected in parallel. It offers high impedance at its resonant frequency and is widely used in filter and amplifier circuits.
9. What are the advantages of Tuned Class C Amplifier?
Tuned Class C amplifiers provide high efficiency (up to 90%), compact size, and good signal amplification at a specific frequency. They are ideal for RF transmitters where power conservation is crucial.
10. What are the applications of Double Tuned Circuit?
Double tuned circuits are used in IF amplifiers, band-pass filters, RF communication systems, and frequency-selective networks where wider bandwidth with controlled selectivity is required.