HELP NEEDED FOR A ngSPICE Simulation Hey everyone, I am very new to simulating circuits on ngspice. We have veen given a project assignment by our professor to simulate a Dickson Charge Pumps in ngspice Netlist. To be specific I am trying to create a ngspice netlist for simulating the Dickson Charge Pump with different input voltages while keeping the frequency constant at 500 MHz and the stop time at 2000 ns. I am using the 180nm_bsim3 model parameters. I have tried creating this code... but it seems to give an error saying (unimplemented control card) *THIS IS THE CODE * Dickson Charge Pump Simulation * Include MOSFET model file .include 180nm_bsim3.txt * Define MOSFETs for the Charge Pump mp m1 Vdd Vmid GND P1 W=10u L=2u mn m2 Vmid Vout GND N1 W=10u L=2u * Define Power Supplies vdd Vdd GND DC 1.8 vgnd GND 0 DC 0 * Define Capacitor cload Vout GND 100f * Define Input Pulse for Charge Pump vin Vmid 0 PULSE(0 1.8 0 0.1ns 0.1ns 10ns 20ns) * Transient Simulation .tran 0 2000ns .backanno .end I have attached the model parameter file.

There is no .backanno command in ngspice, it seems. Remove it. The simulation should work this way.

Tried doing that, but there is no output visible. Is that because I haven't added a plot function in the code?

Yes, you can either add it in the code block or just type “run” and then “plot node_name” on the interpreter to see the plot