A programmable voltage divider has normal and test modes of operation. The divider includes first and second supply nodes, a divider node that provides a data value, and a first divider element that is coupled between the first supply node and the divider node. The divider also includes a controlled...http://www.google.ca/patents/US5952833?utm_source=gb-gplus-sharePatent US5952833 - Programmable voltage divider and method for testing the impedance of a programmable element
