FREQUENCY CONVERSION CIRCUIT OF DIRECT CONVERSION RECEIVING, ITS SEMICONDUCTOR INTEGRATED CIRCUIT, AND DIRECT CONVERSION RECEIVER

摘要

PROBLEM TO BE SOLVED: To reduce errors in I signals and Q signals in a frequency conversion circuit of direct conversion receiving.;SOLUTION: A rectangular parallelepipedic projection 21 of height H_B and width W_B is formed on a silicon substrate, and a gate oxide film is formed on the top surface and a part of the side wall of the projection 21. A source and a drain are formed on both the lateral sides of a gate electrode 26 to form a MOS transistor. The frequency conversion circuit and a direct conversion receiving circuit are composed of the MOS transistors.;COPYRIGHT: (C)2005,JPO&NCIPI