Advanced CMOS RF technology
RDA is of the view that CMOS process is the best process for majority of the RF application. The advantage of CMOS RF is significant: better cost, better process road map, and more suitable for integration with digital circuit. We believe that all current BiCMOS/SiGe based RF IC for cellular and wireless broadband application will be replaced by CMOS on the transceiver side. It is far more difficult to design high performance CMOS RF circuit, as result, many companies had tried and failed to developed CMOS based transceiver for the 2G, 2.5G and 3G cell phones.

RDA has successfully developed several CMOS based transceivers. These transceivers include product for GSM/GPRS, TD-SCDMA, PHS, SCDMA and a TD-SCDM/GPRS dual mode transceiver. RDA has mastered the skill for employing advanced CMOS circuitry for RF IC. RDA has achieved major advancement in following area:

·Fast PLL with very low noise
·Advanced on chip VCO
·High performance Continuous AD
·Linear CMOS circuit
·Low power implementation

Advanced Digitization Design
Another trend of RF design is digitization. The advantage of digital designs are many; flexibility that enable more cost effective multi-mode transceiver, stability that make it less process dependent, die size reduction when process ttechnology improve. All RDA RF Transceiver include significant amount of digital technology. For example, in its Low IF based GPRS transceiver, the IF is digital based, all IF processing such as filtering is done digitally. As for RF system architectures, RDA utilizes following different architectures for various designs.
·Low I/F receiving architecture that eliminate DC offset problem
·Direct Conversion that simplifies receiving circuitry
·Direct modulation transmitter that improve gain and dynamic range
·Polar Loop Modulation

Power Amplifier
RDA develops and markets a series of GaAs based PA for the wireless communication market. RDA is working closely with foundry partner to develop state of the art highly efficient Power Amplifier device and Module. The RDA Power Amplifier and Power Amplifier Module are robust and highly integrated, which make using the product extremely easy As the result of having both Transceiver and PA technology, RDA also offers RF Front End Modules that integrates its PA and Transceiver, which can improve reliability and lower costs. It is worth noting that there are every few IC companies that own both CMOS RF technology and GaAs PA technology.