DIFFERENTIAL COLPITTS VOLTAGE CONTROLLED OSCILLSTOR FOR IMPROVING NEGATIVE RESISTANCE

摘要

voltage-controlled oscillator for outputting a differential signal of the present invention, the first power source supplying a first voltage connected inductor, the first and second switching transistors for the differential, the first and second inductors connected in parallel to the variable capacitor, the third transistor, which gate electrode is coupled to a first node and a second node and a fourth transistor gate electrode is connected, if the bias voltage to the gate electrode of the first transistor is turned on is applied, the negative resistance generated by the voltage applied to the first and second capacitor via a first transistor and, a voltage is output via the first node to the gate electrode of the third transistor is turned on is applied to the case, an additional voltage is applied to the first and second capacitors by the third transistor is negative resistance is increased. If the bias voltage to the gate electrode of the second transistor is turned on is applied, through the second transistor by the voltage applied to the third and the fourth capacitor negative resistance is generated, the second node to the gate electrode of the fourth transistor When the voltage is applied is turned on through the output, the negative resistance is increased further voltage is applied to the third and fourth capacitors by a fourth transistor.