A controller for a power conversion circuit has a first current-reading circuit coupled for receiving a first feedback signal at a first circuit node and generating an internal feedback signal at a second circuit node inversely proportional to the first feedback signal. A second current-reading circuit is coupled for receiving a second feedback signal at the first circuit node and generating the internal feedback signal at the second circuit node inversely proportional to the second feedback signal. The first current-reading circuit generates the internal feedback signal inversely proportional to an electric current injected into the controller at the first circuit node. The second current-reading circuit generates the internal feedback signal inversely proportional to an electric current drawn from the controller at the first circuit node.