| 摘要 |
<p>The present invention relates to a PLL direct modulator and a frequency gain mismatch compensation method in the modulator. A PLL direct modulator in accordance with the present invention includes: a phase-frequency detector (PFD), a charge pump (CP), a loop filter, a voltage-controlled oscillator (VCO), a divider, and a sigma-delta modulator, wherein a frequency gain mismatch compensator is installed between the divider and the VCO to modulate a frequency of the VCO by receiving a frequency signal from the divider and modulation data supplied from the outside. According to the present invention, it is possible to reduce a frequency gain mismatch in the PLL modulator by compensating the frequency gain mismatch through the frequency gain mismatch compensator.</p> |
