Patent ID: 8188777

Claim:
A charge pump circuit comprising: a current-supplying constant current source; a current-drawing constant current source; a main-output side current path including series-connected first and second switching elements provided between the two current sources, wherein a connection point between the first and second switching elements serves as a first output terminal; an auxiliary-output side current path including series-connected third and fourth switching elements provided between the two current sources, wherein a connection point between the third and fourth switching elements serves as a second output terminal; and a glitch compensation circuit including: a comparator operable to compare a potential at the first output terminal or a potential at a designated node in a loop filter connected to the first output terminal, with a potential at the second output terminal; a latch circuit operable to store, as a first output value, an output value of the comparator at a given first timing designated from the outside, and output a charging or discharging instruction according to the first output value, whereafter the latch circuit is operable to successively compare an output value of the comparator after the first timing, with the first output value, and, at a second timing when the output value of the comparator and the first output value become non-identical, to issue a charging/discharging stop instruction; a capacitor connected between the second output terminal and a ground point; and a charge/discharge device operable, in response to an output of the latch circuit, to selectively charge and discharge the capacitor.