Oscillators – Automatic frequency stabilization using a phase or frequency... – With intermittent comparison controls
Patent
1989-01-19
1989-11-14
Grimm, Siegfried H.
Oscillators
Automatic frequency stabilization using a phase or frequency...
With intermittent comparison controls
331 16, 331 18, H03L 702, H03L 716
Patent
active
048810487
ABSTRACT:
A frequency locking device, with pre-positioning in which an oscillator is controlled by the output of a frequency discriminator. Shifts in the frequency discriminator are removed by performing calibrations on this discriminator through two signals with known frequencies Fo and F1 produced by a generator. The signal resulting from this calibration is used to prepare a reference voltage for a digital/analog converter which also receives a digital oscillator control signal and which then produces a voltage representing the control voltage of the oscillator.
REFERENCES:
patent: 3274511 (1966-09-01), Dale et al.
patent: 3297965 (1967-01-01), Chadima, II
Auneau Gisele
Boulanger Alain
"Thomson-CSF"
Grimm Siegfried H.
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