1. Phan Tuan Anh Dec. 2010 Reconfigurable Multiband Multimode LNA for LTE/GSM, WiMAX, and IEEE 802.11.a/b/g/n 17 th IEEE ICECS 2010, Athens, Greece.

2. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 1  Introduction Introduction  Design Approach Design Approach  Conclusions ConclusionsContent  Proposed Circuitry Proposed Circuitry  Simulation Results Simulation Results

3. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 2 Radio standards: - Rapid evolution next generation radio with WiMAX (3.5G), LTE (4G) along with existing GSM (2G), WLAN IEEE 802.11 family.. Reconfigurable Radio… - SoC, SiP, MEMs.. - High demanding for new single device to combine multiple standards, working with different networks for various applications. CMOS is technology of Choice Introduction Introduction

4. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 3 Fig. 1 Source: Bob Iannucci, Nokia 2008 - Required to support multi standards same chip - Reconfigurable, multiband multimode for various standards  Tunable input matching ? - High level of integration, reduce cost - Maintain the same performance as single radio Next generation: Reconfigurable Radio

5. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 4  LNA is the first block in Rx RF front-end - Determine the radio condition: Freq channel, provide Gain, suppress Noise to improve channel sensitivity and selectivity - Input matching for various bands - Reconfigurable over the band for various applications: LTE/GSM at 1.9GHz, WLAN/Bluetooth 802.11.b/g/n at 2.4GHz, WiMAX at 3.5GHz, 802.11.a/n WLAN at 5.2GHz.  Ultimate Goal: Low cost, low power, high performance using CMOS technology.  Ready for any existing wireless standards Design Challenges

6. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 5  Reconfigurable LNA Design Approach Fig. 2. Reconfigurable Principle of the LNA - Selection solely or jointly a bank of cascode LNAs

7. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 6 + Switching CG Devices for various band configuration of cascode LNA Proposed Multiband LNA Fig. 3. Schematic of the proposed multiband LNA

8. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 7 + Input matching - Inductive degenerative input matching - As M 0 varies, L G (~10nH) is varied for better matching. - Bit D1-4 controls the selection of corresponding band. + Load and Buffer - Inductive load L L (4-8nH) and source follower buffer are shared - Reduce the chip size - Different bands are optimized with its own output Cap bank C 1-4 + Gain control - Selection of Gm’s device size M 0 - Optimize for power consumption Proposed Multiband LNA: Features

9. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 8  Input matching and Output matching Simulation Results: S11 and S22 Fig. 4. S11 and S22 for different standards of proposed LNA - Inductive degeneration Ls is used for good NF -L G is needed for better matching as M 0 size varying for various bands - Good S11 and S22 achieved

10. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 9 Simulation Results: S21 and NF Fig. 5. Typical Gain mode and NF of different standards - Good gain over different bands - NF is quite good at low frequency and reasonable at high band

11. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 10  Gain Tuning Simulation Results: Gain variable Fig. 6. Variable gain function over different bands - Varying Gm by selecting bank of M 0 devices for sizing and bias current. - From low to maximum gain mode, 10dB range.

12. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 11  Linearity at various bands Simulation Results: Linearity Fig. 7. Linearity at different bands in Low and High gain modes - High gain mode shows moderate IIP3 - Power consumption is 3/3.4/3.4/5.3mW at 1.9/2.4/3.5/5.2GHz bands, respectively. - 1.5V supply @ 0.18um CMOS

13. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 12  Performance summary and comparison Performance Summary Freq. (GHz) Power (mW) S21 (dB) S11 (dB) NF (dB)IIP3 Tech. μm Topology This work1.9-5.23-5.313-17-141.5-3.1-17.50.18 Cascode bank selection [4]2.4/5.21014/15.5-152.3/4.50/5.60.35 Concurrent Dual-band [6]DC-6.59.716.5-10> 2.7-290n Res.SF.Feed- back [8]2.4-5.44.622-24-122.2-3.1-210.13Multitap Ind. [9] 0.9÷5. 2 7.513-16-122.3-2.9-140.18Switched Ind. [11]5.21011<-102.170.30.18 CS. Single band

14. Phan T. Anh, Phan T. Anh, Dec. 2010 IMWS, NUIM 13 A reconfigurable multi-standard LNA operating from 1.9G to 5.2G bands for most popular standard like LTE/GSM, WiMAX, WLAN 802.11 family. Channel tuning by selection of various combination of cascode bank and input matching Good performances achieved in 0.18um CMOS Promising for single chip, next generation radio. Conclusions Thank You !