A method and apparatus for providing a selected amount of power from a power source to a load produce a pseudo random code sequence of different type bits, in which one type of the different type bits is used to control application of power from the source to the load so that the power applied to the...http://www.google.ca/patents/US7960963?utm_source=gb-gplus-sharePatent US7960963 - Method and apparatus for power control by frequency spreading
