Patent ID: 6181756
Filing Date: 2001-01-30
Classification: H03L,H04B

Abstract:
A method for balancing the output current (i.sub..DELTA.1) of a first charge pump (CHP1), the first charge pump (CHP1) comprising a first charging current source (CS1) and a first discharging current source (CS2), and in which method the output current (i.sub..DELTA.1) of the first charge pump (CHP1) is supplied by at least one said current source (CS1, CS2), characterized in that the method consists of the following steps:providing a second charge pump (CHP2) with a second charging current source (CS3) and a second discharging current source (CS4),supplying the output current (i.sub..DELTA.2) of said second charge pump (CHP2) by at least one said second current source (CS3, CS4), andsupplying a reference current (i.sub.5) on the basis of the output current (i.sub..DELTA.2) supplied by said second charge pump (CHP2),wherein the balancing is conducted by combining said reference current (i.sub.5) with the output current (i.sub..DELTA.1) supplied by the first charge pump (CHP1).