Voltage-controlled oscillator device and method of correcting voltage-controlled oscillator

摘要

The present application discloses a voltage-controlled oscillator device and a method of correcting the voltage-controlled oscillator. The voltage-controlled oscillator device comprises predistortion module, configured to predistort an input voltage to obtain a predistorted voltage; and a voltage-controlled oscillator, configured to generate an output signal with a corresponding oscillation frequency according to the predistorted voltage, wherein the predistortion module corrects a non-linear characteristic of the voltage-controlled oscillator, so that there is a linear relationship between the input voltage and the oscillation frequency of the output signal. The voltage-controlled oscillator device may be applied to a phase-locked circuit in a communication system.

主权项

1. A voltage-controlled oscillator device, comprising:
a predistortion module, configured to predistort an input voltage to obtain a predistorted voltage; and a voltage-controlled oscillator, configured to generate an output signal with a corresponding oscillation frequency according to the predistorted voltage as an only input to the voltage-controlled oscillator, wherein the predistortion module is configured to predistort the input voltage based on only a predistortion function, without depending on a feedback of an output from the voltage-controlled oscillator, to correct a non-linear characteristic of the voltage-controlled oscillator, so that there is a linear relationship between the input voltage and the oscillation frequency of the output signal, and wherein the predistortion module is configured to store the predistortion function as a look-up table in a cache or a memory.