Q6 Design a linear oscillator, using a Hartley configuration, to generate oscillating signal at frequency f = 15 kHz by choosing an appropriate value of Lj and L2, knowing that the inductance is C = 200 µF, the transconductance when the transistor is biased in operation is gm = 2.5 mS and the gate resistance RG = 5 k2. (а) Draw the electric circuit and explain the role of each component. (b) Derive the small signal equivalent model of the open loop circuit and state your main assumptions. Derive the oscillation condition. State any assumptions you make and show all steps of your calculation (c) (d) The main hypothesis for the design of the oscillator in the previous question is that the resonance frequency falls in the mid-band frequency range of the amplifier. Explain briefly what happen and how you would proceed in the case that you want to design an oscillator with resonance frequency in the high frequency regime.

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Q6
Design a linear oscillator, using a Hartley configuration, to generate oscillating signal
at frequency f = 15 kHz by choosing an appropriate value of Lj and L2, knowing that
the inductance is C = 200 µF, the transconductance when the transistor is biased in
operation is gm = 2.5 mS and the gate resistance Rg = 5 kN.
(a)
Draw the electric circuit and explain the role of each component.
(b)
Derive the small signal equivalent model of the open loop circuit and state your
main assumptions.
Derive the oscillation condition. State any assumptions you make and show all
steps of your calculation
(c)
(d)
The main hypothesis for the design of the oscillator in the previous question is
that the resonance frequency falls in the mid-band frequency range of the
amplifier. Explain briefly what happen and how you would proceed in the case
that you want to design an oscillator with resonance frequency in the high
frequency regime.
Transcribed Image Text:Q6 Design a linear oscillator, using a Hartley configuration, to generate oscillating signal at frequency f = 15 kHz by choosing an appropriate value of Lj and L2, knowing that the inductance is C = 200 µF, the transconductance when the transistor is biased in operation is gm = 2.5 mS and the gate resistance Rg = 5 kN. (a) Draw the electric circuit and explain the role of each component. (b) Derive the small signal equivalent model of the open loop circuit and state your main assumptions. Derive the oscillation condition. State any assumptions you make and show all steps of your calculation (c) (d) The main hypothesis for the design of the oscillator in the previous question is that the resonance frequency falls in the mid-band frequency range of the amplifier. Explain briefly what happen and how you would proceed in the case that you want to design an oscillator with resonance frequency in the high frequency regime.
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