| * D:\CMOS_OPAMP_Project\Diff_amp\Diff_amp_Opamp.cir |
| |
| .lib "sky130_fd_pr/models/sky130.lib.spice" tt |
| |
| * Sheet Name: / |
| xM1 Net-_M1-Pad1_ vbias vdd vdd sky130_fd_pr__pfet_01v8 w=20 l=1 |
| xM4 Net-_M2-Pad1_ Net-_M2-Pad1_ vss vss sky130_fd_pr__nfet_01v8 w=20 l=1 |
| xM2 Net-_M2-Pad1_ vinp Net-_M1-Pad1_ Net-_M1-Pad1_ sky130_fd_pr__pfet_01v8 w=50 l=1 |
| xM3 vo vinm Net-_M1-Pad1_ Net-_M1-Pad1_ sky130_fd_pr__pfet_01v8 w=50 l=1 |
| xM5 vo Net-_M2-Pad1_ vss vss sky130_fd_pr__nfet_01v8 w=20 l=1 |
| |
| R1 vo Net-_C1-Pad2_ 290 |
| C1 vout Net-_C1-Pad2_ 3.2p |
| xM6 vout vbias vdd vdd sky130_fd_pr__pfet_01v8 w=20 l=1 |
| xM7 vout vo GND GND sky130_fd_pr__nfet_01v8 w=50 l=1 |
| CL vout GND 14p |
| |
| ******* DC supply info****** |
| VDD vdd GND 5 |
| VSS vss GND 0 |
| VBIAS vbias 0 3.9 |
| |
| *******Transient analysis AC Source******** |
| *VINP vinp 0 SIN(3.9 1m 10k 0 0 0) |
| *VINM vinm 0 SIN(3.9 1m 10k 0 0 180) |
| |
| *******AC analysis AC Source****** |
| VINP vinp 0 dc 3.9 ac 1 |
| VINM vinm 0 dc 3.9 ac -1 |
| |
| ******AC Command***** |
| ac dec 100 1 1000meg |
| *Magnitude dB plot for v(vout) on log scale |
| plot vdb(vout) xlog |
| |
| *Phase degrees plot for v(vout) on log scale |
| let outd = 57.29*vp(vout) |
| settype phase outd |
| plot outd xlimit 1 1000meg ylabel 'phase' |
| let pm = outd + 180 |
| settype phase pm |
| plot pm xlimit 1 1000meg ylabel 'Phase Margin' |
| |
| .endc |
| |
| .end |
