An Active Transmitter Leakage Suppression Technique for CMOS SAW-Less CDMA Receivers

作者：Khatri Himanshu^*; Gudem Prasad S; Larson Lawrence E

来源：IEEE Journal of Solid-State Circuits, 2010, 45(8): 1590-1601.

DOI：10.1109/JSSC.2010.2049792

• CDMA2000 receiver
• CMOS integrated circuits
• direct conversion
• low-noise amplifier (LNA)
• passive mixer
• surface acoustic wave (SAW) filter

A CDMA-2000 receiver without interstage RF SAW filter is presented. An active bandpass sink filter is proposed to selectively filter the transmitted leakage after the downconversion mixer. The impact on receiver noise and linearity performances is discussed. This technique improves the triple-beat (TB) and IIP(2) of the receivers by 6.5 dB each, at the expense of a small increase in DC current and noise. Designed in 0.18 mu m CMOS technology, the receiver achieves 45 dB gain with uncalibrated IIP(2) of +46 dBm and triple-beat of 69 dB.

• 出版日期2010-8