Method and apparatus for steady state analysis of a voltage controlled oscillator
US7332974B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2005 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Jan 27, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/3323
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer-implemented method computes the steady-state and control voltage of a voltage controlled oscillator, given a known frequency or a known period of oscillation of the voltage controlled oscillator. Differential algebraic equations representative of the voltage controlled oscillator are generated, where the differential algebraic equations includes a known period or frequency of oscillation and an unknown control voltage of the voltage controlled oscillator. The differential algebraic equations are modified using a finite difference method, a shooting method, or a harmonic balance method, to obtain a set of matrix equations corresponding to the differential algebraic equations. A solution to the matrix equations is obtained using a Krylov subspace method, using a preconditioner for the Krylov subspace method that is derived from a Jacobian matrix corresponding to the matrix equations, where the solution includes the control voltage of the voltage controlled oscillator in steady state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.