A multi chip housing has a lead frame to which plural die are soldered. The apparatus and methods control, by power management control logic of the electronic device, energy consumption of the electronic device in response to determining the availability of the energy source. In some approaches the negatively-refractive focusing includes negatively-refractive focusing with a transformation medium, where the transformation medium may include an artificially-structured material such as a metamaterial. Some, though not all, aspects of the technique are computer-implemented, and so include encoded program storage media, programmed computing apparatuses, and computer-implemented methods. The original policy in the ER system can be modified for a particular product and the modified policy is stored in the ER system so that the modified policy can be accessed if the product is again presented for a returnwarranty transaction. The apparatus also includes a threshold controller for generating a discrimination threshold for the discriminator according to a relationship between the extracted clock amplitude and a bit error rate to which the extracted clock amplitude corresponds.