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First Patent for New Direct Conversion Architecture

Santa Clara, CA - July 24, 1998 - Global Communication Technology, Inc. (GCT) today announced it has filed a patent with the US Patent Office for its direct conversion architecture, entitled "Single Chip CMOS Transmitter/Receiver", otherwise known as zero IF. Direct Conversion is an architecture which eliminates the intermediate frequency section of traditional superheterodyne radio technologies, and which results in smaller space use, lower power consumption, and a tremendous cost reduction in many applications by bypassing reliance on related IF components.

Dr. K.H. Lee, Engineering Vice President of GCT, said, "GCT has been developing this architecture for the last two years and our architecture is distinct in that it uses standard CMOS process technology which has huge economic advantages over other process technologies available today. Even though there have been several research efforts made by universities to implement so-called "direct conversion," "near zero IF," and other new architectures, they have all been hindered by several well-known barriers. We at GCT passed this wall very successfully and will try to increase integral density further so as to implement a real single RFIC chip which can be applied to different consumer devices and systems such as mobile handsets, wireless LAN, etc."

GCT is developing an advanced RFIC based on this direct conversion architecture, which will be released to the public from next year and used in various devices and standards such as IMT-2000, WLL, CDMA handsets, Bluetooth and wireless LAN solutions.

About GCT Semiconductor, Inc.

GCT Semiconductor is a leading fabless semiconductor company that produces innovative integrated circuit solutions for the wireless communications industry. With its proven radio frequency (RF) CMOS and system-on-a-chip (SOC) expertise, GCT provides state-of-the-art single-chip CMOS RF transceivers, mobile digital TV receivers and Mobile WiMAX solutions serving 3G and 4G mobile system manufacturers by reducing BOM cost, lowering power consumption and minimizing total solution size. For more information, please visit


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