## 3 Post-Layout Simulation Results
### Low-Pass Filter
One percentage THD is reached with \(11.3\) dBm for 2 nd filter order and \(7.2\) dBm level input signal for 4 th and 6 th filter order. Figure 14: 1 dB compression point (\(\mathrm{P}_{\mathrm{1 dB}}\)) for all filter order configurations: (**a**) low frequency path (LP), configured for 20 MHz bandwidth; (**b**) high frequency path (HP), configured for 200 MHz bandwidth. Input tone frequency: 10% of bandwidth. Figure 15: Total harmonic distortion (THD) at different input power levels for all filter order configurations: (**a**) low frequency path (LP), configured for 20 MHz bandwidth; (**b**) high frequency path (HP), configured for 200 MHz bandwidth. Input tone frequency: 10% of bandwidth. In-band input-referred third-order intercept point (IIP3) and spurious free dynamic range (SFDR) for LP and HP is shown in Figure 16. If LP is configured for 20 MHz, values of the IIP3 and SFDR for 2 nd, 4 th and 6 th filter order configurations, respectively, vary from 32.7 dBm to 37.8 dBm and from 68.75 dB to 73.6 dB with 0.2 V\({}_{\text{PP}}\) tones. When HP is configured for 200 MHz, values of the IIP3 and SFDR for 2 nd, 4 th and 6 th filter order configurations, respectively, vary from 34.2 dBm to 39.3 dBm and from 63.59 dB to 67.56 dB with 0.2 V\({}_{\text{PP}}\) tones. The results for key sets of LPF configuration are summarized in Table 1 and a comparison to previous works is presented in Figure 13.0 Comparing the results, it can be seen, that the proposed filter has the best in-band IIP3 and THD parameters. Although the reported filter [20] has excellent NF and large signal distortion performance, it has to be noted that this is achieved by utilising input and output buffer stages with source and load matching. Comparing integrated noise and large signal dynamic performance (P\({}_{\text{1 dB}}\)) of the proposed filter, it can be seen that it also has better parameters of the remaining lot. \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Path** & \multicolumn{3}{c}{**Low Frequency Path (LP)**} & \multicolumn{3}{c}{**How Frequency Path (HP)**} \\ \hline Technology & \multicolumn{6}{c}{65 nm CMOS} \\ \hline Supply, V & \multicolumn{6}{c}{1.2} \\ \hline Tuning ratio & \multicolumn{6}{c}{92.8} \\ \hline Topology 1 & MFB & LAD & MFB + LAD & MFB & LAD & MFB + LAD & MFB + LAD \\ \hline Type 2 & LPF-B & LPF-B & LPF-C-B & LPF-B & LPF-B & LPF-C-B \\ Order & 2 nd & 4 th & 6 th & 2 nd & 4 th & 6 th \\ Area, mm\({}^{2}\) & 0.073 & 0.172 & 0.251 & 0.044 & 0.131 & 0.178 \\ Gain, dB & \(-\)0.55 & \(-\)0.57 & \(-\)0.84 & \(-\)0.48 & \(-\)0.26 & \(-\)0.39 \\ P\({}_{\text{1 dB}}\), dBm & 14.06 & 9.95 & 9.94 & 14.2 & 9.94 & 9.94 \\ Bandwidth, MHz & 2.5 & 20 & 2.5 & 20 & 20 & 20 & 200 & 200 & 200 \\ \hline In-band IIP3, dBm 3 & 38.84 & 38.58 & 36.32 & 35.51 & 35.05 & 34.83 & 45.81 & 44.61 & 37.61 & 37.94 & 36.03 & 36.72 \\ \hline Out-band IIP3, dBm 4 & 38.94 & 36.98 & 28.19 & 24.32 & 25.66 & 22.17 & 35.72 & 37.37 & 32.57 & 20.66 & 30.21 & 16.06 \\ \hline SFDR, dB 3 & 79.45 & 74.13 & 78.46 & 73.04 & 75.47 & 70.2 & 79.32 & 71.07 & 75.12 & 68.57 & 71.52 & 65.29 \\ \hline SFDR, dB 3 & 79.21 & 73.6 & 77.58 & 71.94 & 74.31 & 68.75 & 76.73 & 67.56 & 74.58 & 65.76 & 73.12 & 63.59 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Summary of the designed wideband reconfigurable integrated low-pass filter parameters. Figure 16: In-band input-referred third-order intercept point (IIP3) and spurious free dynamic range (SFDR) at different input power levels for all filter order configurations: (**a**) low frequency path (LP), configured for 20 MHz bandwidth; (**b**) high frequency path (HP), configured for 200 MHz bandwidth. IIP3 input tone configuration: first at 40%, second at 70% of bandwidth, both tone amplitude \(-\)10 dBm.