Oscillators – Automatic frequency stabilization using a phase or frequency... – Plural a.f.s. for a single oscillator
Patent
1981-02-26
1983-10-11
Grimm, Siegfried H.
Oscillators
Automatic frequency stabilization using a phase or frequency...
Plural a.f.s. for a single oscillator
331 17, 331 25, 331 30, 331DIG2, 332 19, H03C 300, H03L 722
Patent
active
044095635
ABSTRACT:
A phase locked loop synthesizer including a phase locked loop (PLL) having a first characteristic loop bandwidth, for generating a synthesized signal, the PLL including a signal controlled oscillator (SCO) having first and second control inputs for controlling the frequency of the SCO, the first control input receiving a signal from the PLL, and a subsidiary frequency compression loop (FCL) having a second characteristic bandwidth wider than said first characteristic bandwidth, the FCL having an output coupled to the second control input of the SCO whereby said SCO is subject to frequency control by both the PLL and the FCL.
REFERENCES:
patent: 3262068 (1966-07-01), Kawai et al.
patent: 3286191 (1966-11-01), Cornwell
patent: 3393380 (1968-07-01), Webb et al.
patent: 3609577 (1971-09-01), Bos
patent: 3611175 (1971-10-01), Boelke
patent: 3614648 (1971-10-01), Byrne
patent: 3703686 (1972-11-01), Hekimian
patent: 3959737 (1976-05-01), Tanis
patent: 4069462 (1978-01-01), Dunn
patent: 4242649 (1980-12-01), Washburn, Jr.
General Electric Company
Grimm Siegfried H.
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