Differential signal driven direct-current voltage generating device

A differential signal driven direct-current voltage generating device for integration to a PLL (phase-locked loop) circuit system having a VCO (voltage-controlled oscillation) circuit, a frequency divider, and a phase detector, for generating an output of a direct-current (DC) voltage in response to a pump-up enable signal and a pump-down enable signal from the phase detector;

• the differential signal driven direct-current voltage generating device comprising:
• a charge pump unit, which is capable of being driven by the pump-up enable signal and the pump-down enable signal to generate an output of a charge pump voltage;
• a loop filter unit, which is capable of performing a loop filtering operation on the output of the charge pump unit to thereby generate an output of a loop-filtered voltage;
• a voltage doubler unit, which is capable of performing an amplitude doubling operation on the output of the loop filter unit to thereby generate an output of an amplitude doubled voltage;
• and
• a spur filter unit, which is capable of performing a spur filtering operation on the output of the voltage doubler unit to thereby generate a spur filtered voltage which is used to serve as the output of the differential signal driven direct-current voltage generating device.

A differential signal driven direct-current voltage generating device for integration to a DLL (delay-locked loop) circuit system having a VCDL (voltage-controlled delay line) circuit and a phase detector, for generating an output of a direct-current (DC) voltage in response to a pump-up enable signal and a pump-down enable signal from the phase detector;

• the differential signal driven direct-current voltage generating device comprising:
• a charge pump unit, which is capable of being driven by the pump-up enable signal and the pump-down enable signal to generate an output of a charge pump voltage;
• a loop filter unit, which is capable of performing a loop filtering operation on the output of the charge pump unit to thereby generate an output of a loop-filtered voltage;
• a voltage doubler unit, which is capable of performing an amplitude doubling operation on the output of the loop filter unit to thereby generate an output of an amplitude doubled voltage;
• and
• a spur filter unit, which is capable of performing a spur filtering operation on the output of the voltage doubler unit to thereby generate a spur filtered voltage which is used to serve as the output of the differential signal driven direct-current voltage generating device.