Mobile communication apparatus including dividers in transmitter and receiver

摘要: A transceiver suitable for larger scale of integration employs direct conversion reception reducing the number filters. Also, VCOs is reduced by utilizing dividers to supply a receiver and transmitter with locally oscillated signals at an RF band. Dividers each having fixed division ratio are used generating receiver, while divider switchable signal transmitter. In addition, variable gain amplifier baseband provided DC offset voltage detector canceling circuit supporting high speed data communications accomplish fast cancellation eliminating intervention filter within feedback loop cancellation.