FREQUENCY VARIATION METHOD VOLTAGE CONTROLLED OSCILLATOR USING THE FREQUENCY VARIATION METHOD AND SPECTROM SPREADING COMMUNICATION RECEIVER USING THE VOLTAGE CONTROLLED OSCILLATOR

摘要

The present invention relates to a voltage controlled oscillator using the variable frequency method and a method thereof. The present invention share a crystal oscillator of a crystal oscillator with an oscillator for generating a fixed frequency constituting a voltage controlled oscillator which oscillation frequency varies. In the present invention integrates the control input to the integrator 12, and by controlling the phase of the divided signal obtained by frequency division from the integrals by the fixed cycle clocks (11) varies the frequency. Each time a minute amount of at least one clock in this case, only the frequency division by the frequency division ratio of one time at the time of dividing the clock changes at a predetermined frequency division ratio to operate the first phase shift clocks as a voltage-controlled oscillator by the exit absorbed. Accordingly, to realize the voltage-controlled oscillator being kept in a frequency precision of a fixed clock.