Patent ID: 7307487
Filing Date: 2007-12-11
Classification: H03C,H03L

Abstract:
1. The driver device for a voltage-controlled oscillator, comprising: an unstable voltage source; a voltage regulator; a driver to generate a control voltage for the oscillator; and a feedback loop to control the driver as a function of an output signal of the oscillator; and wherein the voltage regulator supplies the feedback loop with operating voltage, while the driver is powered by the unregulated voltage of the voltage source, and the feedback loop compensates for voltage fluctuations of the voltage source with the aid of the driver, and wherein the feedback loop receives an intermediate-frequency signal, which is formed by mixing the output signal of the oscillator with a reference signal having a fixed frequency, and the feedback loop compares the phase of the intermediate-frequency signal to the phase of a reference signal and controls the driver based on the comparison result so that a frequency of the oscillator follows a frequency of the reference signal.