A Tuned Amplifier Has a 2

question 17

Multiple Choice

A tuned amplifier has a 2.2 mH inductor and a varactor in its tank. The varactor has the ratings Ct = 72 pf when Vr = 3 Vdc and a Cr = 2.7 for V = 3 Vdc to 6 Vdc. What is the resonant frequency of the circuit described when VR = 6 Vdc?

• A) 599.8 kHz
• B) 479.9 kHz
• C) 657 kHz
• D) 1.20 MHz

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