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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.
Headquarted in Santa Clara, CA, GCT is the leading semiconductor
developer, manufacturer and supplier of the high performance
single RF IC using its patented direct conversion architecture
with the most economical CMOS process technology. GCT has
a R&D subsidiary in Seoul, Korea. For more information
on GCT, WLL and direct conversion technology, please visit
us at http://www.gctsemi.com.
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