Question 01: Colpitts oscillators Consider the MOSFET Colpitts oscilaltor circuit given in the figure below and let L = 10 µH, C1 = 60 pF, C2 = 50 pF, and C3 = 0 pF RFC -o +VDD L Note: RFC is the RF choke inductor and is used only to block the AC signal from reaching the DC supply. 1. Derive the governing equation and determine the frequency of oscillation and the minimum amplification factor needed for sustained oscillations. 2. The capacitor C3 is replaced with a variable capacitor to allow tuning the oscillator. If the capacitance of C3 can vary from 5 to 50 pF and calculate the frequencies of ocillation for the two adjustment extremes and the minimum value of amplification factor needed to ensure oscillation throughout the full tuning range.

Question 01: Colpitts oscillators Consider the MOSFET Colpitts oscilaltor circuit given in the figure below and let L = 10 µH, C1 = 60 pF, C2 = 50 pF, and C3 = 0 pF RFC -o +VDD L Note: RFC is the RF choke inductor and is used only to block the AC signal from reaching the DC supply. 1. Derive the governing equation and determine the frequency of oscillation and the minimum amplification factor needed for sustained oscillations. 2. The capacitor C3 is replaced with a variable capacitor to allow tuning the oscillator. If the capacitance of C3 can vary from 5 to 50 pF and calculate the frequencies of ocillation for the two adjustment extremes and the minimum value of amplification factor needed to ensure oscillation throughout the full tuning range.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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