Paper about current-driven passive mixers from the Oct. Issue of JSSC 2009

Looking through the Oct. issue of the IEEE JSSC 2009, I am only interested in the paper "Analysis and Optimization of Current-Driven Passive Mixers in Narrowband Direct-Conversion Receivers".

I lost my patience before figuring out so many mathematical analysis, and skipped all equations and summarized the main points as below:

1. It mentions that the flicker
noise of the switches appears at the mixer output proportional to
the DC current, and refers to some techniques proposed
to lower the flicker noise corner in the active mixers.

2. The paper compares two widely used current buffer structures,
which are the common-gate and the opamp with RC
feedback.it will be shown that the opamp-based design is advantageous for better performance in terms of eliminating the IQ cross-talk as well as different
high- and low-side gains.

3.

4. The op-amp design is also interesting in common mode feed back control.The input and output share the same common mode voltage.