APPARATUS FOR FREQUENCY MULTIPLIER BASED ON INJECTION LOCKING POSSIBLE FREQUENCY FINE CONTROLLING AND METHOD FOR DRIVING THE SAME

摘要

The present invention relates to an injection lock-based frequency multiplier capable of finely tuning a frequency so that a loop-type voltage-controlled oscillator is provided in a delay locked loop circuit and an injection pulse is sequentially applied to a loop- A delay locked loop for generating and outputting a control voltage according to a phase and frequency comparison result of an external reference clock and a self feedback clock signal; A pulse generator for sequentially outputting an injection clock in units of at least one clock pulse using the reference clock; And a VCO (Voltage Controlled Oscillator) for outputting a multiplication frequency by changing the frequency of an output signal in response to a control voltage from the delay locked loop and an injection clock sequentially input from the pulse generator.