Passive Switched Capacitor RF Front Ends for Spectrum Sensing in Cognitive Radios

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="947373.fig.009a" src="https://static.hindawi.com/articles/ijap/volume-2014/947373/figures/947373.fig.009a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Add (share)</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="947373.fig.009b" src="https://static.hindawi.com/articles/ijap/volume-2014/947373/figures/947373.fig.009b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Multiply (steal)</td></tr></table></td></tr></table>

<table>Techniques for charge domain addition and multiplication operations.</table>

International Journal of Antennas and Propagation

fig9

Figure 9

Figure 9: Passive Switched Capacitor RF Front Ends for Spectrum Sensing in Cognitive Radios 