| 主权项 |
1. A voltage-controlled oscillator comprising:
a tank circuit; a first pair of transistors, wherein each transistor of the first pair of transistors comprises a gate, a drain, and a source, and wherein the drains of the first pair of transistors are coupled to the tank circuit and the gates of the first pair of transistors are cross-coupled with the drains of the first pair of transistors; a second pair of transistors, wherein each transistor of the second pair of transistors comprises a gate, a drain, and a source, and wherein the drains of the second pair of transistors are coupled to the tank circuit and the gates of the second pair of transistors are cross-coupled with the drains of the second pair of transistors; a first resonant filter comprising a first inductor, wherein a first terminal of the first inductor is coupled to the sources of the first pair of transistors, and wherein the first resonant filter does not include a capacitor coupled in parallel to the first inductor; a second resonant filter comprising (i) a second inductor and (ii) a capacitor bank coupled in parallel to the second inductor,
wherein the first inductor of the first resonant filter and the second inductor of the second resonant filter are magnetically coupled,wherein the capacitor bank of the second resonant filter is configured to be used to tune each of the first resonant filter and the second resonant filter, based on the first inductor of the first resonant filter and the second inductor of the second resonant filter being magnetically coupled,wherein a first terminal of the second inductor is coupled to the sources of the second pair of transistors; and a current source having a first terminal coupled to a second terminal of the first inductor. |
