Analog Automatic Gain Control (agc) Cmos Wlan Direct Conversion Receiver (dcr)

The exponential growth of wireless communication in portable device market has been increasing the demand for very flexible RF transceivers, including the ability of communicating in an unpredictable environment, from very weak to highly powered signal levels without losing its functionality. In this paper we present an automatic continuous gain control CMOS receiver for 2.4GHz ISM band with minimum NF of 1.45dB at highest gain mode, ICP of -9dBm at lowest gain mode, and gain variation of 30dB, from 40dB to 10dB. It contains a continuous variable gain LNA, a down-conversion Mixer and a RMS-detector consuming 30mW under 1.8V power supply. © 2011 IEEE.185190Point, R., Mendes, M., Foley, W., (2002) A Differential 2.4ghz Switched-gain Cmos Lna for 802.11b and Bluetooth, pp. 221-224. , AugKobayashi, K., Oki, A.K., Tran, L., Streit, D.C., A novel baseband-1.5 ghz monolithic hbt variable gain amplifier with pin diode gain control IEEE MTT-S Int. Microwave Symp. Dig., May 1995, p. 201Lee, T.H., (1998) The Design of CMOS Radio-Frequency Integrated Circuits, , New York, NY: Cambridge University PressGray, P.R., Hurst, P.J., Lewis, S.H., Meyer, R.G., Analysis and Design of Analog Integrated Circuits, , 5th ed. John Wiley & SonsGoo, J., (2001) High Frequency Noise in CMOS Low Noise Amplifiers, , Palo Alto, California, AugRazavi, B., (1997) Design Considerations for Direct-conversion Receivers, 44Darabi, H., Adibi, A.A., (2000) Noise in Rf Cmos Mixers: A Simple Physical Model, 35. , JanManstretta, D., Castello, R., Svelto, F., (2001) Low 1/f Noise Cmos Active Mixers for Direct-conversion, 48. , SepPark, J., Lee, C., Kim, B., Laskar, J., (2006) Design and Analysis of Low Flicker-noise Cmos Mixers for Direct-conversion Receivers, 54. , MayHo, S.S.K., Saavedra, C.E., (2010) A Cmos Boardband Low-noise Mixer with Noise Cancellation, 58. , MayZhang, Z., Chen, Z., Lau, J., A 900 mhz cmos balanced harmonic mixer for direct conversion receivers IEEE Radio and Wireless Conf., Sep. 2000, pp. 219-222Gilbert, B., Translinear circuits: A proposed classification (1975) Electronic Letters, pp. 14-16Zhang, C., Gharpurey, R., Built-in test of rf mixers using rf amplitude detectors 8th International Symposium on Quality Electronic Design, 2007Wang, J., Wang, J., Shen, Y.H.W., Yi, X., Hong, Z., A direct conversion wlan receiver 6th International Conference on ASIC, 200