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5.2 GHz variable-gain amplifier and power amplifier driver for WLAN IEEE 802.11a transmitter front-end

Zhang Xuelian, Yan Jun, Shi Yin and Dai Fa Foster

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Abstract: A 5.2 GHz variable-gain amplifier (VGA) and a power amplifier (PA) driver are designed for WLAN IEEE 802.11a monolithic RFIC. The VGA and the PA driver are implemented in a 50 GHz 0.35 µm SiGe BiCMOS technology and occupy 1.12 × 1.25 mm2 die area. The VGA with effective temperature compensation is controlled by 5 bits and has a gain range of 34 dB. The PA driver with tuned loads utilizes a differential input, single-ended output topology, and the tuned loads resonate at 5.2 GHz. The maximum overall gain of the VGA and the PA driver is 29 dB with the output third-order intercept point (OIP3) of 11 dBm. The gain drift over the temperature varying from -30 to 85  converges within ±3 dB. The total current consumption is 45 mA under a 2.85 V power supply.

Key words: SiGe BiCMOS

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    Received: 18 August 2015 Revised: Online: Published: 01 January 2009

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      Zhang Xuelian, Yan Jun, Shi Yin, Dai Fa Foster. 5.2 GHz variable-gain amplifier and power amplifier driver for WLAN IEEE 802.11a transmitter front-end[J]. Journal of Semiconductors, 2009, 30(1): 015008. doi: 10.1088/1674-4926/30/1/015008 Zhang X L, Yan J, Shi Y, Dai F F. 5.2 GHz variable-gain amplifier and power amplifier driver for WLAN IEEE 802.11a transmitter front-end[J]. J. Semicond., 2009, 30(1): 015008. doi:  10.1088/1674-4926/30/1/015008.Export: BibTex EndNote
      Citation:
      Zhang Xuelian, Yan Jun, Shi Yin, Dai Fa Foster. 5.2 GHz variable-gain amplifier and power amplifier driver for WLAN IEEE 802.11a transmitter front-end[J]. Journal of Semiconductors, 2009, 30(1): 015008. doi: 10.1088/1674-4926/30/1/015008

      Zhang X L, Yan J, Shi Y, Dai F F. 5.2 GHz variable-gain amplifier and power amplifier driver for WLAN IEEE 802.11a transmitter front-end[J]. J. Semicond., 2009, 30(1): 015008. doi:  10.1088/1674-4926/30/1/015008.
      Export: BibTex EndNote

      5.2 GHz variable-gain amplifier and power amplifier driver for WLAN IEEE 802.11a transmitter front-end

      doi: 10.1088/1674-4926/30/1/015008
      • Received Date: 2015-08-18

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