Patent ID: 7474132
Filing Date: 2009-01-06
Classification: H03K

Abstract:
1. A device comprising: a current sensor having a first connection (sen) node at which a leakage current is sensed and a second connection node at which a compensation enable signal is generated to initiate a compensation of the leakage current via a keeper system, wherein the current sensor includes: a load circuit that emits a load leakage current on an wired output path; an online keeper coupled to an internal storage/memory leakage node on the wired output path and which has a control input point that is coupled to the second connection node of the current sensor to receive the compensation enable signal; and a dummy circuit configured similarly to the load circuit and which generates a substantially exact amount of leakage current as the load circuit, wherein an output of the dummy circuit is coupled to the first connector of the current sensor, which enables the current sensor to sense the amount of leakage current within the dummy circuit and adjust a magnitude of the compensation enable signal generated at the control input of the online keeper wherein the current sensor amplifies the sensed leakage current to generate the compensation enable signal, a magnitude of which activates a specific amount of compensation current required for compensating the sensed amount of leakage current; wherein the online keeper generates the compensation current based on the magnitude of the compensation enable signal; wherein the compensation current generated provides a dynamic online (real-time) compensation of the load leakage current.