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Consider the following statements related to oscillator circuits : 1. The tank circuit of a Hartley oscillator is made up of a tapped capacitor and a common inductor. 2. The tank circuit of a Colpitts oscillator is made up of a tapped capacitor and a common oscillator. 3. The Wien Bridge oscillator is essentially a two-stage amplifier with an RC bridge in the first stage, and, the second stage serving as an inverter. 4. Crystal oscillators are fixed frequency oscillators with a high Q-factor.  Which of the following are true?

Consider the following statements related to oscillator circuits : 1. The tank circuit of a Hartley oscillator is made up of a tapped capacitor and a common inductor. 2. The tank circuit of a Colpitts oscillator is made up of a tapped capacitor and a common oscillator. 3. The Wien Bridge oscillator is essentially a two-stage amplifier with an RC bridge in the first stage, and, the second stage serving as an inverter. 4. Crystal oscillators are fixed frequency oscillators with a high Q-factor.  Which of the following are true? Correct Answer 2, 3 and 4 only

Statement 1: The tank circuit of a Hartley oscillator is made up of a tapped inductor and a common capacitor. (Hence, Statemen 1 is incorrect)

Statement 2: The tank circuit of a Colpitts oscillator is made up of a tapped capacitor and a common oscillator. (Hence, Statemen 2 is correct)

Statement 3: The Wien Bridge oscillator is essentially a two-stage amplifier with an RC bridge in the first stage, and, the second stage serving as an inverter. (Hence, Statemen 3 is correct)

Statement 4: Crystal oscillators are fixed frequency oscillators with a high Q-factor.(Hence, Statemen 4 is correct)

Explanation:

Hartley Oscillator:

In a Hartley oscillator, the positive output feed-back is inductively coupled by a tank circuit consisting of an inductor coil with a center tap.

The tank circuit of Hartley Oscillator is shown:



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