Linearizing device for a frequency-modulation ramp and its application to a radio altimeter
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United States of America Patent
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May 7, 2002
Grant Date -
N/A
app pub date -
Jun 21, 1995
filing date -
Jun 5, 1992
priority date (Note) -
Expired
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Abstract
The invention relates to a device for the linearization of a frequency modulation ramp comprising a voltage controlled oscillator associated with a phase locked-loop. The device comprises a digitally controlled oscillator of which only the most heavily weighted bit is used, and a digital phase comparator receiving, on the one hand, said most heavily weighted bit and, on the other hand, a signal supplied by the voltage controlled oscillator. Application to very high linearity and very high accuracy radio altimeters.
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