Voltage control oscillator and quadrature modulator

A voltage control oscillator comprising:

• first and second field effect transistors, a drain of one of which is connected to a gate of the other and a drain of the other of which is connected to a gate of the one;
• third and fourth field effect transistors, a drain of one of which is connected to a gate of the other and a drain of the other of which is connected to a gate of the one;
• 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 that capacitively couples one end of the third inductor and one end of the fourth inductor;
• and
• a second capacitor that capacitively couples the other end of the third inductor and the other end of the fourth inductor;
• wherein
• a first wire forms the first inductor and is formed in a loop shape;
• a second wire forms the second inductor and is formed in a loop shape in parallel to the first wire;
• first and second gaps respectively separate the first and second wires;
• third and fourth wires respectively form the third inductor and the fourth inductor and are formed in a loop shape to respectively overlap the first and second wires;
• and
• third and fourth gaps respectively form the first capacitor and the second capacitor and separate the third and fourth wires.