Nxp B.v.

Marcel Van De Gevel

Kaveh Kianush

Evert-Jan Pol

Mark Stoopman

Koen Van Hartingsveldt

Federico Bruccoleri

A low-pass filter circuit comprising: a low-pass filter input terminal; a low-pass filter output terminal; a reference terminal; at least three filter resistors connected in series with each other between the low-pass filter input terminal and the low-pass filter output terminal, such that there is a resistor-connecting-node between each adjacent pair of filter resistors; a plurality of filter capacitors, one for each of the resistor-connecting-nodes, wherein each of the filter capacitors is connected between an associated resistor-connecting-node and the reference terminal; and a branch connected in parallel with the at least three filter resistors, wherein the branch comprises a bridging capacitor and a bridging resistor in series with each other.

Low-pass filter circuit

A phase locked loop circuit comprising: a phase detector configured to compare the phase of an input signal with the phase of a feedback signal in order to provide an up-phase signal and a down-phase-signal; an oscillator-driver configured to: apply an up-weighting-value to the up-phase signal in order to provide a weighted-up-phase signal; apply a down-weighting-value to the down-phase signal in order to provide a weighted-down-phase signal; and combine the weighted-up-phase signal with the weighted-down-phase signal in order to provide an oscillator-driver-output-signal; and a controller configured to: set the up-weighting-value and the down-phase-weighting as a first-set-of-unequal-weighting-values, and replace the first-set-of-unequal-weighting-values with a second-set-of-unequal-weighting-values if an operating signal of the phase locked loop circuit reaches a limit-value without satisfying a threshold value.

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Haarlem, Netherlands

Marcel Van De Gevel