| 摘要 |
A voltage-controlled oscillator with feedback comprises a first metal oxide semiconductor (MOS) tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a launch control (LC) resonance unit, a fifth MOS tube, a sixth MOS tube, a seventh MOS tube, an eighth MOS tube and a reference current source. Grid electrodes of the fifth MOS tube and the sixth MOS tube are respectively connected with two output ends of differential output voltage of the voltage-controlled oscillator. Drain electrodes of the fifth MOS tube and the sixth MOS tube are respectively connected with supply voltage. Source electrodes of the fifth MOS tube and the sixth MOS tube are respectively connected with the reference current source and a drain electrode and a grid electrode of the seventh MOS tube. A current mirror is formed by the seventh MOS tube and the eighth MOS tube and bias current is offered for a differential oscillating circuit through the eighth MOS tube. A circuit comprises the voltage-controlled oscillator. Due to dynamic bias to the voltage-controlled oscillator, direct current power consumption is reduced. |
