Question

In Colpitt oscillator the feedback network consists of

• A. two inductors and a capacitor
• B. two capacitors and an inductor
• C. three pairs of RC circuit
• D. three pairs of RL circuit

Hint:

Colpitts oscillator uses a capacitive divider: two capacitors + one inductor, unlike Hartley which uses two inductors.

Answer 1

The Correct Option is B

Step 1: Recall basic structure of Colpitts oscillator.
Colpitts oscillator is an LC oscillator where the feedback is obtained using a capacitive voltage divider.
Step 2: Identify components of feedback network.
The feedback network consists of:
Two capacitors \(C_1\) and \(C_2\) connected in series and one inductor \(L\).
Step 3: Why two capacitors are used.
The two capacitors form a voltage divider which provides the correct fraction of output voltage back to the input.
Step 4: Choose correct option.
Hence the correct option is (B).
Final Answer:
\[ \boxed{\text{(B) two capacitors and an inductor}} \]