Patent Document ID: 8209154
Application ID: 12112966
Patent Flag: 1

Claim One:
1. A method of simulating phase noise in a circuit, the method comprising: constructing an unconditioned system of linear equations based on a system of non-linear equations; generating a first plurality of time-domain preconditioned systems of linear equations; generating a time-domain preconditioned approximate solutions for each time-domain preconditioned system of linear equations to form a first plurality of time-domain preconditioned approximate solutions; generating a first plurality of frequency-domain preconditioned systems of linear equations; generating a frequency-domain preconditioned approximate solutions for each frequency-domain preconditioned system of linear equations to form a first plurality of frequency-domain preconditioned approximate solutions; determining whether to use the first plurality of time-domain preconditioned approximate solutions or the first plurality of frequency-domain preconditioned approximate solutions to generate an unconditioned approximate solution to the unconditioned system of linear equations; generating the unconditioned approximate solution to the unconditioned system of linear equations based on the determination; and generating an approximate solution to the system of non-linear equations based on the generated unconditioned approximate solutions.