Frequency generating system, voltage-controlled oscillator module and method for adjusting signal frequency

摘要

A voltage controlled oscillator module including a VCO unit and a gain adjustment unit is provided. The VCO unit is configured to generate a frequency signal based on a control voltage. The gain adjustment unit is coupled to the VCO unit and configured to receive a first adjustment voltage, a second adjustment voltage, and a reference voltage and accordingly adjusts the control voltage to adjust a frequency value of the frequency signal. The gain adjustment unit includes an adjustment circuit unit and a reference circuit unit. A first voltage-frequency curve of the frequency value of the frequency signal and a voltage value of the first adjustment voltage changes in response to a structure characteristic of the adjustment circuit unit. Furthermore, a frequency generating system and a method for adjusting a signal frequency of the VCO module are provided.

主权项

1. A voltage-controlled oscillator module, comprising:
a voltage-controlled oscillator unit, configured to generate a frequency signal according to a control voltage; and a gain adjustment unit, coupled to the voltage-controlled oscillator unit and configured to receive a first adjustment voltage, a second adjustment voltage, and a reference voltage, thereby adjusting the control voltage to adjust a frequency value of the frequency signal, wherein the gain adjustment unit comprises: an adjustment circuit unit, comprising:
a first adjustment unit, configured to receive the first adjustment voltage and the reference voltage, thereby adjusting the control voltage to adjust the frequency value of the frequency signal based on a first voltage-frequency curve between the frequency value of the frequency signal and a voltage value of the first adjustment voltage; anda second adjustment unit, configured to receive the second adjustment voltage and the reference voltage, thereby adjusting the control voltage to adjust the frequency value of the frequency signal based on a second voltage-frequency curve between the frequency value of the frequency signal and a voltage value of the second adjustment voltage, wherein the first voltage-frequency curve is different from the second voltage-frequency curve; and a reference circuit unit, coupled to the first adjustment unit and the second adjustment unit and configured to receive the reference voltage, thereby adjusting the control voltage to reduce an influence of noise of the unit voltage on the frequency signal.