An integrated low power highly linear 2.4-GHz CMOS receiver front-end based on current amplification and mixing
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razavi, 1998, RF Microelectronics
2000, Mixer with current mirror load
nam, 2003, Low 1/f noise and dc offset RF mixer for direct conversion receiver using parasitic vertical NPN bipolar transistor in deep n-well CMOS technology, Symp VLSI Circuit Dig Tech Papers