APPARATUS FOR CANCELLATING DC OFFSET IN TIME DIVISION DUPLEXING MODE RECEIVER

摘要

An apparatus for cancelling a DC offset in a TDD(Time Division Duplexing) mode receiver is provided to remove a DC offset of a current frame during a receive time gap of data transmission frames by using DC offset information of a previous frame, thereby minimizing an increase of power consumption. The first register(21) stores a preset ideal DC value. The second register(23) stores a DC-offset sampled from a data channel. The first subtractor(25) subtracts the stored DC value from the stored DC-offset. The third register(27) temporarily stores a result value of the first subtractor(25) until a DC-offset sampled from a data channel of a next frame is loaded on the second register(23). The second subtractor(29) subtracts the temporarily stored DC-offset value from the DC-offset loaded on the second register(23).