Phase-locked loop with improved trade-off between lock-up time a

Details Phase-locked loop with improved trade-off between lock-up time a Phase-locked loop with improved trade-off between lock-up time a

1998-09-28

2000-08-08

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

331 14, 331 17, 331 25, H03L 7085, H03L 7087

Patent

active

061007676

ABSTRACT:
In a phase-locked loop with reference, feedback, and error signals, the trade-off between lock-up time and power dissipation is improved by one of the following methods: supplying a continuous error signal, instead of an intermittent error signal, to a charge pump during lock acquisition; employing a half-integer frequency divider and making multiple phase-and-frequency comparisons during each reference signal cycle; employing a prescaled feedback signal and making multiple phase-and-frequency comparisons during each reference signal cycle; providing multiple feedback loops and employing a selectable number of the loops during lock acquisition; and employing multiple feedback loops with prescaling of the reference and feedback signals.

REFERENCES:
patent: 4280104 (1981-07-01), Rzeszewski
patent: 4803705 (1989-02-01), Gillingham et al.
patent: 5254959 (1993-10-01), Wunsch
patent: 5410571 (1995-04-01), Yonekawa et al.
patent: 5521948 (1996-05-01), Takeuchi
patent: 5530406 (1996-06-01), Fernandez Duran et al.
patent: 5729179 (1998-03-01), Sumi
patent: 5982239 (1999-11-01), Takahashi et al.
Ozawa, "PLL Shuhasu Shinsesaiza--Kairo Sekkeiho (PLL Frequency Synthesizers--Circuit Design Methods)", Sogo Denshi Shuppan, pp. 74-75 and 125-131 (1994).
Yasuaki Sumi, et al. "Development of an AM/FM Frequency Synthesizer Radio Receiver," Sanyo Technical Review, vol. 10, No. 1, pp. 26-32 (Feb. 1978).
Yasuaki Sumi, et al. "PLL Frequency Synthesizer Using Multi-Phase Detector," Papers of Technical Meeting on Electronic Circuts, IEE Japan, pp. 77-82 (Jan. 16, 1997).

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