New Releases

Successful Launch of WLL RFIC

Santa Clara, CA - Oct 11, 1999 - Global Communication Technology, Inc. (GCT) today announced that it succeeded in implementing direct conversion architecture based RF IC, GRF4101, for WLL handsets. GRF4101 is a true direct convertsion CMOS RF receiver, which will be paired with a RF transmitter, GRF4100, later this year.

GRF4101 is a CMOS monolithic integrated circuit specially designed for wideband direct sequence CDMA system operating in the 2.370GHz to 2.400GHz band. This chip includes a fully integrated direct conversion receiver composed of a LNA, a quadrature demodulator, an on-chip Automatic Gain Control, a variable gain amplifier, a DC-offset canceling servo loop, a channel selection baseband filter, and a programmable on-chip PLL with VCO.

Dr. Kyeongho Lee, Vice President of Engineering, said, "GRF is our core RF technology, so-called direct conversion architecture and GRF4101 is the first chip which is implemented with our core technology. GRF4101 integrates all components necessary for an RF receiver just using standard CMOS technology. External SAW filters, VCO or loop filters are not required for GRF4101. Today we are very proud of presenting the true CMOS Direct Conversion RF receiver. Soon the paired RF Tx will be provided and the true CMOS RF single chip in the next year. We'll extend to apply our technology to other applications in IMT-2000, PCS and Bluetooth."

This chip will be used starting next year in WLL handsets of Korean WLL manufacturers who are under field trial and service with Korea Telecom and Hanaro Telecom locally.

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


Media Contact:

Contact a member of our GCT media team