| 摘要 |
A symmetrical, balanced, down-conversion mixer is achieved by the coordinated layout of a balanced Local Oscillator (LO) divider circuit and a balanced Radio Frequency (RF) mixer circuit, such that the LO divider is in the center and the RF mixer is arrayed symmetrically around the LO divider. In particular, the LO divider is partitioned into four portions (e.g., Ip, In, Qp, Qn), which are placed in respective quadrants, defined by orthogonal reference axes through the LO divider center. The RF mixer is similarly partitioned into four corresponding portions, which are placed around the LO divider portions in each quadrant. By integrating the LO divider and RF mixer in the layout of the symmetric, balanced, down-conversion mixer, greater component matching and control of current paths are possible, improving operational quality parameters such as IRR, IP2, and LO feedthrough. |
