Multi-current source and method for regulating current

摘要

A multi-current-source comprises a voltage converter (VC), a first current source (CS1) with a first terminal (A1) which is adapted to be coupled to an output (OUT) of a voltage converter (VC) and with a second terminal (B1) which is adapted to be coupled to an input (IN) of the voltage converter (VC), at least a second current source (CS2) with a first terminal (A2) which is adapted to be coupled to the output (OUT) of the voltage converter (VC) and with a second terminal (B2) which is adapted to be coupled to the input (IN) of the voltage converter (VC), wherein the first current source (CS1) being adapted to provide a first load current (Il1) at its first terminal (A1) the first load current (Il1) being regulated to a first constant value and to provide a first unidirectional error current (Ierr1) at its second terminal (B1), wherein the at least one second current source (CS2) being adapted to provide a second load current (Il2) at its first terminal (A2), the second load current (Il2) being regulated to a second constant value and to provide a second unidirectional error current (Ierr2) at its second terminal (B2), such that a sum of the first unidirectional error current (Ierr1) and the second unidirectional error current (Ierr2) adjusts the first and the second load current (Il1, Il2).

主权项

1. A multi-current-source comprising:
a voltage converter having an input and an output to provide a voltage; a first current source with a first terminal which is adapted to be coupled to the output of the voltage converter and with a second terminal which is adapted to be coupled to the input of the voltage converter; and at least a second current source with a first terminal which is adapted to be coupled to the output of the voltage converter and with a second terminal which is adapted to be coupled to the input of the voltage converter; wherein the first current source is adapted to provide a first load current at its first terminal, the first load current being regulated to a first constant value and to provide a first unidirectional error current at its second terminal, wherein the at least one second current source is adapted to provide a second load current at its first terminal, the second load current is regulated to a second constant value and to provide a second unidirectional error current at its second terminal, such that a sum of the first unidirectional error current and the second unidirectional error current adjusts the first and the second load current, wherein each error current is directly fed back to the input of the voltage converter.