Automatic switching phase-locked loop

Details Automatic switching phase-locked loop Automatic switching phase-locked loop

2006-09-19

2008-12-30

Mis, David (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

C331S025000, C331SDIG002

Reexamination Certificate

active

07471158

ABSTRACT:
An automatic switching phase-locked loop (PLL) is disclosed, including a phase detector, a charge pump generating a pump current, a band selector receiving a control voltage to produce a band selection signal and a voltage setting signal based the control voltage, a loop filter generating the control voltage corresponding to the pump current and setting the control voltage based on the voltage setting signal, and a multi-band voltage control oscillator (VCO) coupled to the control voltage and the band selection signal, selecting one of a plurality of operating bands based on the band selection signal, and providing an output signal of a frequency within the selected operating band based on the control voltage.

REFERENCES:
patent: 6952124 (2005-10-01), Pham

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