Noise-induced FM demodulation and nonlinear dynamics in a PLL circuit

Takehiro Hirai, Tetsuya Matsuno, Kiyoshi Toko, Kaoru Yamafuji

Research output: Contribution to journalArticlepeer-review


Nonlinear dynamics and the effect of noise on the dynamics in the FM (Frequency Modulation) demodulator were investigated. The FM demodulator concerned here is composed of the phase-locked loop. Various nonlinear responses including chaos were observed. It was also found that an adequately demodulated output was recovered from a turbulent state by applying noise to the FM input. The obtained correlation curve exhibited a peak around a certain value of the power of the applied noise. This phenomenon was apparently similar to what is called the stochastic resonance observed in various kinds of nonlinear systems.

Original languageEnglish
Pages (from-to)145-149
Number of pages5
JournalResearch Reports on Information Science and Electrical Engineering of Kyushu University
Issue number1
Publication statusPublished - Mar 1 1997

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Electrical and Electronic Engineering


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