Closed-loop voltage-to-frequency converter
A closed-loop voltage-to-frequency (V/F) converter includes a voltage-controlled-oscillator (VCO) placed in a feedback voltage-locked loop (VLL). This converter achieves both wide bandwidth (for good phase-noise suppression) and good spurious rejection. The closed-loop V/F converter may be further configured in a larger phase-locked loop (PLL) to achieve accurate channel selection that is independent of temperature and process variations.