| 摘要 |
<p>A varactor circuit (200) and voltage-controlled oscillation are described. The varactor circuit (200) includes a first varactor (201), a second varactor (202), a third varactor (203), and a fourth varactor (204). A first source-drain node (231) associated with the first varactor (201) and a second source-drain node (232) associated with the second varactor (202) are coupled to a first input node (211). A first gate node (241) for the first varactor (201) is coupled to a first output node (250). A second gate node (242) for the second varactor (202) is coupled to a second output node (251). A third gate node (243) for the third varactor (203) and a fourth gate node (244) for the fourth varactor (204) are coupled to a second input node (213). A third source-drain node (233) associated with the third varactor (203) is coupled to the first output node (250). A fourth source- drain node (234) associated with the fourth varactor (204) is coupled to the second output node (251). In other embodiments, varactor circuits (400, 450) block and re-center VCO output CML.</p> |
