Separation of high and low frequency behavior in non-linear circuit simulation, excited with modulated signals

Author

Bjurman, Ulf ; Engdahl, Göran

Author_Institution

Dept. of Electr. Eng., Malardalen Hogskola, Vasteras, Sweden

Volume

36

Issue

4

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

968

Lastpage

970

Abstract

Exciting non-linear circuits with modulated signals will generate crossmodulatlon frequencies. In ordinary simulation techniques this makes time stepping methods a necessity. In the case of EMC testing where the carrier frequency is as high as 2 GHz and the modulating frequency only 1 kHz, the simulation time will be extremely long. This paper presents Time Domain Frequency Separation (TDFS), a method where the high and low frequency behavior is calculated separately to decrease the computation time. In a simulation made with Saber the calculation took approximately fourteen hours, and with TDFS in Matlab two minutes,

Keywords

circuit simulation; electromagnetic compatibility; modulation; nonlinear network analysis; time-domain analysis; HF/LF behavior separation; Matlab; computation time reduction; crossmodulatlon frequencies; high frequency behavior; low frequency behavior; modulated signal excitation; nonlinear circuit simulation; time domain frequency separation; time stepping method; Amplitude modulation; Boundary conditions; Chirp modulation; Circuit simulation; Computational modeling; Demodulation; Frequency modulation; Magnetic domains; Nonlinear circuits; Signal generators;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.877603

Filename

877603