VOLTAGE-CONTROLLED OSCILLATOR MODULE AND PHASE-LOCKED LOOP DEVICE INCLUDING THE SAME
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United States of America Patent
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Issued Date -
Oct 2, 2014
app pub date -
Mar 27, 2014
filing date -
Mar 28, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A voltage-controlled oscillator (VCO) module combines a low VCO-gain value with compensation for large frequency drifts. The VCO module comprises a VCO circuit and a time-integrator. The VCO circuit is fed with a first frequency tuning voltage and a second frequency tuning voltage which is produced by the time-integrator from the first frequency tuning voltage. In some embodiments, the time-integrator may be comprised of a transconductor connected in series with a capacitor, and the transconductor may have a linear operation range with low slope or zero-slope, located between two side ranges with deeper slope.
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