Phase Noise Simulation Using General-purpose Circuit Analysis Programs

In the present paper, parameterized Spice models are developed for the phase noise simulation. It is accomplished by a standard frequency and noise analysis for obtaining the noise factor using the noise sources, incorporated in the library elements. Based on the Leeson model, the single-sideband phase noise is investigated. An approach is developed to phase noise reduction in oscillator circuits. It is realized by a parametric analysis with respect to the feedback element values. A generalized approach to computer-aided phase noise analysis of oscillator circuits is developed with a low-pass filters of firstsecondand third order in the feedback circuit. The impulse-sensitivity function is obtained for oscillator circuits, describing the sensitivity to the phase instability due to the noises in the circuit.