Patent
Phase locked loop
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TLDR
In this article, a phase-locked loop consisting of a main charge pump driven by a phase error signal, and providing a first input to a loop filter, is described, which outputs a regulating voltage for regulating the oscillation frequency of a voltage controlled oscillator in the phase locked loop.Abstract:
A disclosed exemplary embodiment is a phase locked loop comprising a main charge pump driven by a phase error signal, and providing a first input to a loop filter An auxiliary charge pump driven by the phase error signal feeds a second input of the loop filter The loop filter can be an active loop filter comprising an operational amplifier and a feedback RC network The first input of the active loop filter can be an inverting input of the operational amplifier and the second input can be a non-inverting input of the operational amplifier An on-chip stabilizing capacitor fed by the auxiliary charge pump and coupled to the second input of the loop filter is significantly smaller than the conventional stabilizing capacitors The loop filter outputs a regulating voltage for regulating the oscillation frequency of a voltage controlled oscillator in the phase locked loopread more
Citations
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References
More filters
Patent
Loop filter architecture
TL;DR: In this paper, a phase-lock loop (PLL) filter with a second change pump is described. But the PLL filter does not require the use of a large capacitor and can therefore be integrated.
Patent
Dual loop phase lock loops using dual voltage supply regulators
TL;DR: In this paper, a dual loop phase lock loop with high loop bandwidth and low power consumption is described, where each loop is provided with a voltage supply regulator circuit which regulates the voltage of a portion of each loop.
Patent
Semiconductor integrated circuit
TL;DR: In this paper, the logic states of the third control signals are converted to the selected power switches, which are then used to control the power switches to supply power or cut power supply.
Patent
Pwm controller with integrated pll
TL;DR: In this article, a PWM controller consisting of an input node operable to receive a reference signal and a phase-locked loop (PLL) is presented, which is used to supply power to electronic components using a phase lock loop.
Patent
Charge pump circuit for a high speed phase locked loop
Ravi Kumar,Chandra P. Tiwari +1 more
TL;DR: In this paper, a charge sharing suppression circuit for a charge pump circuit in a phase locked loop is disclosed that is capable of suppressing charge sharing due to static phase error in the phase-locked loop.