Low-noise LC voltage-controlled oscillator

• Main Authors: GENG YANHUI, TANG ZHONGQIANG, QU XIONGFEI, ZHOU PENG, LIU YUNLAI
• Format: Patent
• Language: Chinese; English
• Published: 25.06.2024
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; GENERATION OF NOISE BY SUCH CIRCUITS; GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER

The utility model relates to the field of voltage-controlled oscillators, in particular to a low-noise LC voltage-controlled oscillator which comprises a first oscillation unit. A second oscillation unit; the differential coupling capacitor is bridged between the first oscillation unit and the second oscillation unit; and the amplification unit is bridged between the first oscillation unit and the second oscillation unit, and the output end of the amplification unit is connected with the OUT port. According to the technical scheme, the first oscillation unit and the second oscillation unit are connected in parallel through the differential coupling capacitor and the amplification unit which are connected between the first oscillation unit and the second oscillation unit in a bridging mode, and the first oscillation unit and the second oscillation unit are connected in parallel through the arranged differential coupling capacitor. The filtering capability of phase noise can be improved; the differential coupli