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Using a BJT biased at IC = 1 mA, design a Colpitts oscillator to operate at 0 = 106
Chapter 18, Problem 18.11(choose chapter or problem)
Using a BJT biased at IC = 1 mA, design a Colpitts oscillator to operate at 0 = 106 rad/s. Use C1 = 0.01F and assume that the coil available has a Q of 100 (this can be represented by a resistance in parallel with C1 given by Q/0C1). Also assume that there is a load resistance at the collector of 2 k and that for the BJT, ro = 100 k. Find C2 and L.
Questions & Answers
QUESTION:
Using a BJT biased at IC = 1 mA, design a Colpitts oscillator to operate at 0 = 106 rad/s. Use C1 = 0.01F and assume that the coil available has a Q of 100 (this can be represented by a resistance in parallel with C1 given by Q/0C1). Also assume that there is a load resistance at the collector of 2 k and that for the BJT, ro = 100 k. Find C2 and L.
ANSWER:Step 1 of 3
Given,
Current,
Oscillating frequency of the Colpitts oscillator,
The capacitance,
The charge
Resistance at the collector,
The resistance of the BJT,
Diagram of the Colpitts oscillator: