Feedback information for multiple serving cells are transmitted on high speed dedicated physical control channel. Foams made from water-in-oil emulsions, including high internal phase emulsion are disclosed. This permits the influent to move radially outwardly thus slowing the influent and providing a residence time for gravitational separation of lighter immiscible liquids from the influent. According to the latch-type level converter, not only can low-amplitude signals be accurately amplified, but also input signals having a common-mode voltage higher than the supply voltage can be received.