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TowerJazz to deliver 4G RF front-end IC for VT Silicon

Posted: 21 Dec 2009     Print Version  Bookmark and Share

Keywords:4G  RF front-end  WiMAX 

TowerJazz is the chosen one by VT Silicon to develop silicon 4G RF front-end IC capable of meeting the stringent operating requirements of 4G mobile devices. VT Silicon chose TowerJazz's 0.18µm SiGe process instead of a more expensive GaAs process, allowing significantly lower cost and much higher integration. In addition, the design capabilities provided by TowerJazz enable fast and efficient RFIC design flow for a time-to-market advantage.

TowerJazz's 0.18µm Silicon Radio Platform includes a SiGe transistor capable of operating up to 200GHz. These devices have noise and power performance competitive with GaAs, and offer as much as 40 per cent lower die cost. SiGe BiCMOS technology allows complete integration of the RF front end in a wireless device on a single piece of silicon. Bipolar devices in the process can be used to integrate the LNA, the antenna transmit/receive and transmit diversity switches, and the power amplifier, eliminating the need for a number of expensive discrete GaAs devices.

The CMOS devices enable mixed-signal and digital functions on the same chip allowing programmable control of RF functions, advanced sensors, and serial digital communication. The resulting high levels of integration reduce the cost of the complete system by minimising the BOM. This technology delivers enhanced features and higher levels of integration for RF functions in future cell phones (3G/4G), wireless LAN devices, and 4G multi-mode devices. SiGe BiCMOS technology is expected to displace chips built today with more expensive GaAs technology.

"By using the Silicon Radio Platform developed by TowerJazz, we were able to achieve higher levels of integration and enhanced functionality in our 4G RF Front End IC while at the same time reducing the cost of our chip and minimising the RF system BOM. Using traditional GaAs does not allow the integration of complex digital and analogue functions into a monolithic front end RFIC," said Vikram Krishnamurthy, CTO, VT Silicon. "Our design, an industry first, takes full advantage of this silicon process to provide highly intelligent digital communications, programmability, and control of all RF functions. It offers a rich set of features within the 4G RF front-end IC primarily due to the availability of CMOS and bipolar transistors offered in one process."

"We continue to see migration of GaAs products into SiGe as an exciting growth opportunity for our technology as evidenced by the breakthrough design VT Silicon is delivering for 4G mobile devices," said Marco Racanelli, senior VP and GM of RF/HPA and Aerospace and Defence Business Groups. "We look forward to helping our wireless customers realise innovative, next-generation products not only by leveraging our industry leading SiGe process, but also using our design enablement libraries which speed time-to-market for these emerging mobile applications."

The first chip of the family (VFM2500) will be available for testing in Q1 10 with production targeted at Q4 2010. The initial design will cover the 2.5GHz to 27GHz WiMAX band as well as the 2.4GHz Wi-Fi band, and integrates all of the RF Front End functions on a single silicon die (including support for transmit antenna diversity and 2x2 DL MIMO) with all of the passives (TX and RX filters and baluns) embedded in a 5mm x 5.5mm x1mm, 30-pin QFN package.

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