QUESTION 2 2.1. Design a Hartley Oscillator to generate an output frequency of 455 kHz. The parallel inductor has a value of 3 mH and a winding resistance of 2 n. Assume stray capacitance around the...

Extracted text: QUESTION 2 2.1. Design a Hartley Oscillator to generate an output frequency of 455 kHz. The parallel inductor has a value of 3 mH and a winding resistance of 2 n. Assume stray capacitance around the MOSFET to be 13 pF. The only capacitors which are available are 27 pF and 6 pF. 2.1.1. Ignore biasing resistors and determine which capacitor must be selected if a MOSFET with a Cob value of 10 pF is used. 2.1.2. Calculate the bandwidth of the tank circuit. Design a brute-force frequency synthesizer to generate 240, 255, 270 and 405 MHz from a single 10 MHz crystal. Use ONLY some of the following components: • 2 x Frequency dividers (divide by 2 only) • 3 x Frequency doublers (multiple by 2 only) 4 x Frequency triplers (multiple by 3 only) 2 x Frequency mixers (additive mixers only) 2.2.


Extracted text: QUESTION 1 The output of a signal generator, with output impedance of 75 Q and frequency of 1 MHz is connected to a spectrum analyser which indicates the following: Fundamental frequency amplitude = 5dBm, Second harmonic frequency = -5 dBm and Third harmonic frequency = -2 dBm. 1.1. 1.1.1. Calculate the total output power, in Watts, of the signal generator. 1.1.2. Calculate the total harmonic distortion (THD) of the signal generator. 1.1.3. Sketch the spectrum analyser display showing all calculated values of the voltage amplitudes and frequency.