Coupled Differential Colpitts Oscillator using Magnetic Coupling

摘要

According to the present invention, a differential Colpitts oscillator coupled by magnetic coupling includes: a first oscillator including a first inductor connected to an output voltage terminal (Vout), and a second inductor part connected to a gate voltage terminal (Vg); and a second oscillator including a third inductor part connected to the output voltage terminal (Vout), and a fourth inductor part connected to the gate voltage terminal (Vg). The first and third inductor parts are magnetically coupled and the second and fourth inductor parts are coupled, so coupling between the inductors is completed, and thus, the output of the first oscillator and the output of the second oscillator can be combined as single output. Therefore, the present invention is capable of reducing power consumption by avoiding the use of a long transmission line.