Oscillators – Automatic frequency stabilization using a phase or frequency... – Plural a.f.s. for a single oscillator
Patent
1991-12-31
1992-10-20
Grimm, Siegfried H.
Oscillators
Automatic frequency stabilization using a phase or frequency...
Plural a.f.s. for a single oscillator
331 14, 331 25, 360 51, H03L 7087
Patent
active
051573555
ABSTRACT:
A phase-locked loop device for producing an output clock synchronized in phase with an input clock, wherein in addition to a loop responsive to the phase difference between an output clock of a controlled oscillator and the input clock for controlling the controlled oscillator, there is provided another loop for controlling the controlled oscillator in accordance with the frequency difference between the output clock of the controlled oscillator and a reference clock.
REFERENCES:
patent: 4069462 (1978-01-01), Dunn
patent: 4388596 (1983-06-01), Yamashita
patent: 4404530 (1983-09-01), Stryer
patent: 4590439 (1986-05-01), Goggin
patent: 4688205 (1987-08-01), Abiko
patent: 4729024 (1988-03-01), Kawai et al.
Gohda Makoto
Shikakura Akihiro
Tanaka Yasuyuki
Yamashita Shinichi
Canon Kabushiki Kaisha
Grimm Siegfried H.
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