| 摘要 |
A voltage-controlled oscillator (VCO) module (100) combines a low VCO-gain value with compensation for large frequency drifts. The VCO module comprises a VCO circuit (1) and a time-integrator (2). The VCO circuit is fed with a first frequency tuning voltage (V 1 ) and a second frequency tuning voltage (V 2 ) which is produced by the time-integrator from the first frequency tuning voltage. In preferred embodiments, the time-integrator may be comprised of a transconductor (20) connected in series with a capacitor (29), and the transconductor has a linear operation range with low slope or zero-slope, located between two side ranges with deeper slope. |
