Patent ID: 6509770
Filing Date: 2003-01-21
Classification: H03D,H03L

Abstract:
A charge pump, comprising:a source branch for producing a source current, said source branch including at least one current mirror and a transistor; a sink branch for producing a sink current; a reference stage; and a regulating device; at least one branch selected from the group consisting of said source branch and said sink branch having an input-side transistor; said source branch including an output stage having an output-side transistor and a circuit transistor; said sink branch including a n output stage having an output-side transistor and a circuit transistor; a first branch selected from the group consisting of said source branch and said sink branch receiving and being controlled by a reference current; said reference stage simulating said output stage of said source branch, at least with regard to s aid output-side transistor of said source branch; said reference stage simulating said output stage of said sink branch, at least with regard to said output-side transistor of said sink branch; said regulating device for regulating a second branch selected from group consisting of said source branch and said sink branch, said second branch being different from said first branch; said reference stage generating an equivalent symmetrical current that replicates a fault current; and the symmetrical current controlling said regulating device.