Phase-lock loop circuit with fuzzy control

Details Phase-lock loop circuit with fuzzy control Phase-lock loop circuit with fuzzy control

1995-06-30

1998-09-08

Chin, Stephen

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

3642746, 395 3, 327147, H03D 324

Patent

active

058056491

ABSTRACT:
A phase-lock loop circuit with fuzzy control, includes a phase comparator whose output is connected to a low-pass filter that drives a voltage-controlled oscillator. The phase comparator generates a signal that represents the phase difference between an input signal and a signal generated by the oscillator. The oscillator of the present invention is furthermore driven by a control signal generated by fuzzy control. The input of the fuzzy control is the signal that represents the phase difference.

REFERENCES:
Simon et al., "Real-time navigation using the global positioning system", IEEE Aerospace and Electronic System Magazine, Jan. 1995.
European Search Report from European Patent Application No. 94830326.8, filed Jul. 1, 1995.
Electronics & Communications In Japan, Part I --Communications, vol. 76, No. 9, 1993, New York, US pp. 44-54, Yoshiaki Tarusawa et al. "Digital Loop-Preset Synthesizer (DLPS) For High-Speed Frequency Switching".
1992 IEEE International Symposium On Circuits and Systems, vol. 6 of 6, May 10, 1992, San Diego pp. 2661-2664, C. Fiocchi et al. "A Sigma-Delta Based PLL For Non-Sinusoidal Waveform".
IEEE 1994 Position Location And Navigation Symposium, Apr. 11, 1994, Las Vegas, US, pp. 252-259 D. Simon et al. "Fuzzy Phase-Locked Loops".

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