PHASE LOCKED LOOP BASED FREQUENCY STABILIZER HAVING A VOLTAGE CONTROLLED OSCILLATOR CAPABLE OF GENERATING AN OUTPUT SIGNAL HAVING A CONSTANT DUTY CYCLE

摘要

Disclosed is a phase locked loop-based frequency fixing device including a voltage controlled oscillator capable of generating an output signal having a constant duty cycle. The frequency fixing device based on the phase locked loop according to the present invention boosts both when the output is changed to high and when the output is changed to low for a delay cell constituting a voltage controlled oscillator. The duty cycle of the output signal output through the voltage-controlled oscillator by adding an auxiliary PMOS (P-channel Metal Oxide Semiconductor Field Effect Transistor) and an auxiliary NMOS (N-channel Metal Oxide Semiconductor Field Effect Transistor) to enable boosting). You can support to keep this constant.