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A 1.4V, 13.5mW, 10/100MHz 6th order elliptic filter/VGA with DC-offset correction in 90nm CMOS

M. Elmala, B. Carlton, R. Bishop, K. Soumyanath

Intel Res. & Dev., Intel Corp., Hillsboro, OR, USA
In proceeding of: Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEESource: IEEE Xplore

ABSTRACT This paper presents a complete base-band chain for WLAN applications in 1.4 V 90 nm CMOS. The chain consists of a 6th order elliptic Gm-C 10/100 MHz filter and five VGA stages. The design is DC-offset free and uses optimized transconductance for linearity and low-voltage operation. Moreover, the integrators in the filter are compensated for losses through a frequency transformation. The IIP3 is 2 dBm at 13.5 dB minimum gain, while dissipating 13.5 mW.

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