IP2 and DC Offset Tuning in Current Mode Output Downconversion Mixers

This paper describes IP2 and DC offset tuning methods for current mode output downconversion mixers, which are suitable for low-voltage RFIC applications. A prototype of a 1.5 V double-balanced I/Q mixer for cellular applications operating in a 700 MHz - 2200 MHz, frequency range, equipped with the calibration circuits and fabricated in a 0.13 um RF CMOS technology, is presented. Experimental results confirm the effectiveness of the proposed tuning approach.