This paper presents novel approaches to oscillator dynamic linear
simulations. The simulations use the RF linear simulation software
Genesys to simulate the integral transistor-based LC oscillators
and the op-amp based Wien (RC) oscillator with the new criterion.
The simulation approaches and criteria are designed based on a
new oscillator linear theory, which treats oscillators as
the energy-free two-port linear networks with the full
characteristics of oscillators. The simulations are dynamic in
order to be consistent with the dynamic oscillation buildup. The
simulations are also linear to obey the circuit linearity constraint.
The network response is controlled by the Thevenin source, where both
E and R of the source are dynamic. This
source is created from oscillator internal dynamic resonant
energy. The generalized scattering parameter (S’) is used
for the dynamic linear simulations. The simulations showed that the LC
and Wien oscillators have the same characteristics at oscillation
stable states, namely, the internal negative resistance (NR),
internal inductive and capacitive impedances, positive phase
slope, and negative net resistance of source loop.