Patent ID: 8134421

Claim:
A voltage control oscillator comprising: first and second field effect transistors connected so that a drain of the first field effect transistor is connected to a gate of the second field effect transistor and a drain of the second field effect transistor is connected to a gate of the first field effect transistor; third and fourth field effect transistors connected so that a drain of the third field effect transistor is connected to a gate of the fourth field effect transistor and a drain of the fourth field effect transistors is connected to a gate of the third field effect transistor; a first inductor connected between the drain of the first field effect transistor and the drain of the second field effect transistor; a second inductor connected between the drain of the third field effect transistor and the drain of the fourth field effect transistor; a third inductor magnetically coupled to the first inductor; a fourth inductor magnetically coupled to the second inductor; a first capacitor configured to capacitively couple a first end of the third inductor and a first end of the fourth inductor; and a second capacitor configured to capacitively couple a second end of the third inductor and a second end of the fourth inductor.