LTspice gate nand

[cheniour]

hello i'm new in this groups and i need a help
my project topic energy harvesting .so i need to know how i use gate nade bcause it have many branch any person can help me please

 

[opampsmoker]

NAND gate....yes you get it in the logic section, then put in your digital thresholds and output high and low voltage.

Labs: LTspice NAND gates: ECE 1050-005 Spring 2019 Matlab for ECE Design

utah.instructure.com

 

[alec_t]

Welcome to ETO!
Note that the native generic NAND gate doesn't behave quite like a real-world one (such as a CD4000 series gate).
Post your project schematic, plus your asc file.

 

[cheniour]

you can help me please I want to do the simulation I prepared the all blocks but now I'm going to try to command the semi actif boost rectifier by the two pwm signal but the output voltage reach at 450 mv so I need 1.5 volt I don t know what is the problem
also tomorrow I will do a meeting but anything worked correctly

 

[alec_t]

Edit the inverter and both NAND gates so that Vhigh = 1.5V.
Set the sim run time to 0.1, with all other parameters blank.

 

[cheniour]

there is a fault in my inverter ?

 

[alec_t]

Your inverter has Vhigh = 15V. That would put its low/high threshold at 7.5V, which the input could never reach.

 

[eTech]

I made a just a few changes to get it to run. You'll have to troubleshoot.
See attached.

 

[cheniour]

thank you very much
why did you added resistance interne 100m and what's mean il(1) =0?

 

[eTech]

thank you very much
why did you added resistance interne 100m and what's mean il(1) =0?

All voltage sources have some resistance. i(L1)=0 tells spice to initialize L1 inductor to 0 current at start of simulation.
Both help convergence.