The invention relates to the design and operation of local clock control circuits which operate to supply a local clock signal to a controlled block of a digital circuit in response to an enable signal representative of an enable condition. The invention is embodied in several alternative local clock...http://www.google.co.uk/patents/US5646554?utm_source=gb-gplus-sharePatent US5646554 - Method and apparatus for selective clocking using a Muller-C element
