Fig. 5
From: Synchronization bandwidth enhancement induced by a parametrically excited oscillator
Comparison of frequency stability. Measured Allan deviation with different amplitudes with fixed DC voltage Vdc = 35 V; Vac = 550 mV for parametric excitation (a) nd Vac = 335 mV for direct excitation (b), where the dashed lines and solid lines are the results before synchronization and after synchronization, respectively. c Frequency stability comparison at an integration time of τ = 1 s; five sets of Allan deviations were measured at each amplitude. The dashed lines are the fitted results before synchronization, and the solid lines are the fitted results after synchronization
