diff --git a/rtl/z_dsp/IIR_Filter.v b/rtl/z_dsp/IIR_Filter.v
index f0ce94f..a8e5a4c 100644
--- a/rtl/z_dsp/IIR_Filter.v
+++ b/rtl/z_dsp/IIR_Filter.v
@@ -172,7 +172,7 @@ inst_c4         (
 assign	y_re       =   v1_re + y2_re;
 assign	y_im       =   v1_im + y2_im;
 
-reg signed	[data_in_width+frac_data_out_width+1:0] dout_round;
+wire signed	[data_in_width+frac_data_out_width+1:0] dout_round;
 
 FixRound #(data_in_width+frac_data_out_width+2,frac_data_out_width) u_round1 (clk, rstn, en, y_re, dout_round);
 
diff --git a/rtl/z_dsp/mult_C.v b/rtl/z_dsp/mult_C.v
index ecafc58..ce8599b 100644
--- a/rtl/z_dsp/mult_C.v
+++ b/rtl/z_dsp/mult_C.v
@@ -98,8 +98,8 @@ wire         signed  [A_width+D_width:0]     Im_tmp;
 assign    Re_tmp  =  ac - bd;
 assign    Im_tmp  =  ad + bc;
 
-reg         signed  [A_width+C_width:0]     Re_round;
-reg         signed  [A_width+D_width:0]     Im_round;
+wire         signed  [A_width+C_width:0]     Re_round;
+wire         signed  [A_width+D_width:0]     Im_round;
 
 FixRound #(A_width+C_width+1,frac_coef_width) u_round1 (clk, rstn, en, Re_tmp, Re_round);
 FixRound #(A_width+C_width+1,frac_coef_width) u_round2 (clk, rstn, en, Im_tmp, Im_round);
diff --git a/script_m/diff_plot_py.m b/script_m/diff_plot_py.m
index 5d3c2a1..21c5eed 100644
--- a/script_m/diff_plot_py.m
+++ b/script_m/diff_plot_py.m
@@ -18,12 +18,12 @@ n1000_1100 = find((n>=edge+1000e-9-1e-12) & (n<=edge+1100e-9+1e-12));%下降沿
 ne = find((abs(diff)>=1e-4) & (abs(diff)<1));%误差小于万分之一的点
 ne(1) = 1;
 
-% window_length = 100e-9*fs;
-% diff_mean_window = movmean(diff,window_length);
-% diff_std_window = movstd(diff,window_length);
-% n_mean_window = find((abs(diff_mean_window)>=1e-4) );%100ns窗，误差均值小于万分之一点
-% n_std_window = find((abs(diff_std_window)>=1e-4) ); %100ns窗，误差方差小于万分之一点
-% n_common = max(n_mean_window(end),n_std_window(end));
+window_length = 100e-9*fs;
+diff_mean_window = movmean(diff,window_length);
+diff_std_window = movstd(diff,window_length);
+n_mean_window = find((abs(diff_mean_window)>=1e-4) );%100ns窗，误差均值小于万分之一点
+n_std_window = find((abs(diff_std_window)>=1e-4) ); %100ns窗，误差方差小于万分之一点
+n_common = max(n_mean_window(end),n_std_window(end));
 %原始数据作图
 tiledlayout(2,1)
 ax1 = nexttile;
@@ -68,10 +68,10 @@ elseif a(2) > 5e-6
     plot_p(n1000(1)); %下降沿1us
     plot_p(ne(end));  %误差小于万分之一
     fprintf("Falling edge of 20ns~40ns mean :%.4e\t std :%.4e\t",mean(diff(n20_40)),std(diff(n20_40)));
-    fprintf("Falling edge of 1us~1.1us mean :%.4e\t std :%.4e\n",mean(diff(n1000_1100)),std(diff(n1000_1100)));
+    fprintf("Falling edge of 1us~1.1us mean :%.4e\t std :%.4e\t",mean(diff(n1000_1100)),std(diff(n1000_1100)));
     % fprintf("The error after falling edge of 1us is:%.4e\t",diff(n1000(1)));
     % fprintf("The time of erroe less than 1e-4 is :%.4e us\n",(n(ne(end))-n(n_edge(1))));
-    % fprintf("The mean and std stably less than 1e-4 is :%.4e s\n",(n(n_common)-n(n_edge(1))));
+    fprintf("The mean and std stably less than 1e-4 is :%.4e s\n",(n(n_common)-n(n_edge(1))));
 
 end