A receiver having a function of a direct current offset, and including a receiving section for receiving a radio frequency signal, an analog signal processing section for amplifying, band-converting and frequency-converting an analog signal inputted from the receiving section, and an AD converting section...http://www.google.de/patents/US6498929?utm_source=gb-gplus-sharePatent US6498929 - Receiver having DC offset decreasing function and communication system using the same
