A 380-MHz CMOS linear-in-dB signal-summing variable gain amplifier with gain compensation techniques for CDMA systems | IEEE Conference Publication | IEEE Xplore

A 380-MHz CMOS linear-in-dB signal-summing variable gain amplifier with gain compensation techniques for CDMA systems


Abstract:

A linear-in-dB signal-summing Variable Gain Amplifier (VGA) is fabricated in 0.25 /spl mu/m CMOS technology. Two gain compensation techniques are proposed in order to com...Show More

Abstract:

A linear-in-dB signal-summing Variable Gain Amplifier (VGA) is fabricated in 0.25 /spl mu/m CMOS technology. Two gain compensation techniques are proposed in order to compensate the gain deviations due to the MOSFET characteristic which has a square-law characteristic or an exponential-law characteristic determined by its current density. Temperature compensation techniques are also proposed. A gain range of 80 dB, a gain error of within /spl plusmn/3 dB, an NF of 11 dB are obtained at 380 MHz by measurement.
Date of Conference: 13-15 June 2002
Date Added to IEEE Xplore: 07 August 2002
Print ISBN:0-7803-7310-3
Conference Location: Honolulu, HI, USA

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