diff --git a/spice/cdac.spice b/spice/cdac.spice
index 910c377..be3159b 100644
--- a/spice/cdac.spice
+++ b/spice/cdac.spice
@@ -4,35 +4,37 @@
 .lib "globalfoundries-pdk-libs-gf180mcu_fd_pr/models/ngspice/sm141064.ngspice" typical
 .lib "globalfoundries-pdk-libs-gf180mcu_fd_pr/models/ngspice/sm141064.ngspice" mimcap_typical
 
-.param width=10u
+.option method = gear
+
+.param width=2.4u
 
 * Voltage sources definition
 .param vh=3.3
-.param timescale=5m
+.param timescale=5u
 
-VCC ref 0 5
-VD1 d1 0 PULSE(0 {vh} {1*timescale} 1p 1p {23*timescale} {25*timescale})
-VD2 d2 0 PULSE(0 {vh} {2*timescale} 1p 1p {21*timescale} {25*timescale})
-VD3 d3 0 PULSE(0 {vh} {3*timescale} 1p 1p {19*timescale} {25*timescale})
-VD4 d4 0 PULSE(0 {vh} {4*timescale} 1p 1p {17*timescale} {25*timescale})
-VD5 d5 0 PULSE(0 {vh} {5*timescale} 1p 1p {15*timescale} {25*timescale})
-VD6 d6 0 PULSE(0 {vh} {6*timescale} 1p 1p {13*timescale} {25*timescale})
-VD7 d7 0 PULSE(0 {vh} {7*timescale} 1p 1p {11*timescale} {25*timescale})
-VD8 d8 0 PULSE(0 {vh} {8*timescale} 1p 1p {9*timescale} {25*timescale})
-VD9 d9 0 PULSE(0 {vh} {9*timescale} 1p 1p {7*timescale} {25*timescale})
-VD10 d10 0 PULSE(0 {vh} {10*timescale} 1p 1p {5*timescale} {25*timescale})
-VD11 d11 0 PULSE(0 {vh} {11*timescale} 1p 1p {3*timescale} {25*timescale})
-VD12 d12 0 PULSE(0 {vh} {12*timescale} 1p 1p {1*timescale} {25*timescale})
+VCC ref 0 3.3
+VD1 d1 0 PULSE({vh} 0 {1*timescale} 1p 1p {23*timescale} {25*timescale})
+VD2 d2 0 PULSE({vh} 0 {2*timescale} 1p 1p {21*timescale} {25*timescale})
+VD3 d3 0 PULSE({vh} 0 {3*timescale} 1p 1p {19*timescale} {25*timescale})
+VD4 d4 0 PULSE({vh} 0 {4*timescale} 1p 1p {17*timescale} {25*timescale})
+VD5 d5 0 PULSE({vh} 0 {5*timescale} 1p 1p {15*timescale} {25*timescale})
+VD6 d6 0 PULSE({vh} 0 {6*timescale} 1p 1p {13*timescale} {25*timescale})
+VD7 d7 0 PULSE({vh} 0 {7*timescale} 1p 1p {11*timescale} {25*timescale})
+VD8 d8 0 PULSE({vh} 0 {8*timescale} 1p 1p {9*timescale} {25*timescale})
+VD9 d9 0 PULSE({vh} 0 {9*timescale} 1p 1p {7*timescale} {25*timescale})
+VD10 d10 0 PULSE({vh} 0 {10*timescale} 1p 1p {5*timescale} {25*timescale})
+VD11 d11 0 PULSE({vh} 0 {11*timescale} 1p 1p {3*timescale} {25*timescale})
+VD12 d12 0 PULSE({vh} 0 {12*timescale} 1p 1p {1*timescale} {25*timescale})
 
 * cdac_line: Capacitor controlled by switch
 .subckt cdac_line in out ref_a ref_b c_width=5u c_length=5u
-XQN sw_out in ref_a sw_out  nmos_3p3 w=width l=0.28u AD={width*0.24u} AS={width*0.24u} PD={2*(width + 0.24u)} PS={2*(width + 0.24u)}
-XQP sw_out in ref_b ref_b   pmos_3p3 w=width l=0.28u AD={width*0.24u} AS={width*0.24u} PD={2*(width + 0.24u)} PS={2*(width + 0.24u)}
+XQP sw_out in ref_a sw_out  pmos_3p3 w=width l=0.28u AD={width*0.24u} AS={width*0.24u} *PD={2*(width + 0.24u)} PS={2*(width + 0.24u)}
+XQN sw_out in ref_b ref_b   nmos_3p3 w=width l=0.28u AD={width*0.24u} AS={width*0.24u} *PD={2*(width + 0.24u)} PS={2*(width + 0.24u)}
 XC1 sw_out out mim_1p5fF c_width=c_width c_length=c_length m=1
 .ends cdac_line
 
 * Components
-.param cu=10u
+.param cu=5u
 XC0 0    outl mim_1p5fF c_width={sqrt(1)*cu}   c_length={sqrt(1)*cu}   m=1
 XCA outl outr mim_1p5fF c_width={sqrt(1)*cu}   c_length={sqrt(1)*cu}   m=1
 RCA outl outr 100T
@@ -54,7 +56,7 @@ XD12 d12 outr ref 0 cdac_line c_width={sqrt(32)*cu} c_length={sqrt(32)*cu}
 .end
 
 .control
-tran 10u 100m uic
+tran 10n 200u uic
 set wr_singlescale
 wrdata output.txt V(outr) V(d1) V(d2) V(d3) V(d4) V(d5) V(d6) V(d7) V(d8) V(d9) V(d10) V(d11) V(d12)
-.endc
\ No newline at end of file
+.endc
diff --git a/spice/cdac_ideal.spice b/spice/cdac_ideal.spice
new file mode 100644
index 0000000..1afa9ca
--- /dev/null
+++ b/spice/cdac_ideal.spice
@@ -0,0 +1,62 @@
+* CDAC Simulation
+
+.include "globalfoundries-pdk-libs-gf180mcu_fd_pr/models/ngspice/design.ngspice"
+.lib "globalfoundries-pdk-libs-gf180mcu_fd_pr/models/ngspice/sm141064.ngspice" typical
+.lib "globalfoundries-pdk-libs-gf180mcu_fd_pr/models/ngspice/sm141064.ngspice" mimcap_typical
+
+.option method = gear
+
+.param width=2.4u
+
+* Voltage sources definition
+.param vh=3.3
+.param timescale=5u
+
+VCC ref 0 3.3
+VD1 d1 0 PULSE({vh} 0 {1*timescale} 1p 1p {23*timescale} {25*timescale})
+VD2 d2 0 PULSE({vh} 0 {2*timescale} 1p 1p {21*timescale} {25*timescale})
+VD3 d3 0 PULSE({vh} 0 {3*timescale} 1p 1p {19*timescale} {25*timescale})
+VD4 d4 0 PULSE({vh} 0 {4*timescale} 1p 1p {17*timescale} {25*timescale})
+VD5 d5 0 PULSE({vh} 0 {5*timescale} 1p 1p {15*timescale} {25*timescale})
+VD6 d6 0 PULSE({vh} 0 {6*timescale} 1p 1p {13*timescale} {25*timescale})
+VD7 d7 0 PULSE({vh} 0 {7*timescale} 1p 1p {11*timescale} {25*timescale})
+VD8 d8 0 PULSE({vh} 0 {8*timescale} 1p 1p {9*timescale} {25*timescale})
+VD9 d9 0 PULSE({vh} 0 {9*timescale} 1p 1p {7*timescale} {25*timescale})
+VD10 d10 0 PULSE({vh} 0 {10*timescale} 1p 1p {5*timescale} {25*timescale})
+VD11 d11 0 PULSE({vh} 0 {11*timescale} 1p 1p {3*timescale} {25*timescale})
+VD12 d12 0 PULSE({vh} 0 {12*timescale} 1p 1p {1*timescale} {25*timescale})
+
+* cdac_line: Capacitor controlled by switch
+.subckt cdac_line in out ref_a ref_b k=1
+XQP sw_out in ref_a sw_out  pmos_3p3 w=width l=0.28u AD={width*0.24u} AS={width*0.24u} PD={2*(width + 0.24u)} PS={2*(width + 0.24u)}
+XQN sw_out in ref_b ref_b   nmos_3p3 w=width l=0.28u AD={width*0.24u} AS={width*0.24u} PD={2*(width + 0.24u)} PS={2*(width + 0.24u)}
+C1 sw_out out {k*20f}
+.ends cdac_line
+
+* Components
+.param cu=5u
+CC0 0    outl 20f
+CCA outl outr {64/63*20e-15}
+RCA outl outr 100T
+XD1  d1  outl ref 0 cdac_line k=1
+XD2  d2  outl ref 0 cdac_line k=2
+XD3  d3  outl ref 0 cdac_line k=4
+XD4  d4  outl ref 0 cdac_line k=8
+XD5  d5  outl ref 0 cdac_line k=16
+XD6  d6  outl ref 0 cdac_line k=32
+XD7  d7  outr ref 0 cdac_line k=1
+XD8  d8  outr ref 0 cdac_line k=2
+XD9  d9  outr ref 0 cdac_line k=4
+XD10 d10 outr ref 0 cdac_line k=8
+XD11 d11 outr ref 0 cdac_line k=16
+XD12 d12 outr ref 0 cdac_line k=32
+
+.op
+.option post nomod
+.end
+
+.control
+tran 10n 200u uic
+set wr_singlescale
+wrdata output.txt V(outr) V(d1) V(d2) V(d3) V(d4) V(d5) V(d6) V(d7) V(d8) V(d9) V(d10) V(d11) V(d12)
+.endc