Patent ID: 9285809
Filing Date: 2016-03-15
CPC Classification: G05F,H03F

Claim Text:
1. A current source for connection with a load, the current source comprising: a current control unit including feedback sensing inputs for sensing generated current by sensing voltage at a reference impedance or voltage at the load, and an output configured to be connected to the load; and an active compensation circuit including a reference input configured to be connected to a reference node that is not connected to the load, and a compensation input configured to be connected to the load, and an output configured to be connected to the load such that the load is between the output of the current control unit and the output of the active compensation circuit, the active compensation circuit further including a negative feedback circuit that is responsive to the reference input and the compensation input, to generate a signal on the output of the active compensation circuit, wherein the negative feedback circuit is responsive to the compensation input via a signal that is a function of the compensation input, and wherein the signal on the output of the active compensation circuit results in an equivalence of a signal applied to the reference input and the signal that is a function of the compensation input.