RF Electronics Chapter 6: Oscillators Page 193
2022, C. J. Kikkert, James Cook University, ISBN 978-0-6486803-9-0.
rather than the resonator. For low noise crystal oscillators, the output amplifier should
impose a negligible load on the resonator and should use low noise transistors and low
resistor values. For best comparison the same transistors and the same APLAC-HB
simulator is used in all the simulations of figures 6.13 to 6.36.
Figure 6.35. Output waveform obtained using nonlinear (harmonic balance) analysis.
Figure 6.36. Phase noise of the oscillator.
RF and Microwave Oscillators
At RF and Microwave frequencies (above 1GHz), transmission lines are often used as
circuit elements. The MAR6 amplifier, used here, is a typical MMIC costing less than
$10. These devices are very simple to use, are convenient, and can be used as low power
amplifier blocks in many applications. The S parameters for these devices can be obtained
from the Mini-Circuits web site as follows:
RF Electronics: Design and Simulation
193 www.cadence.com/go/awr
